MURATA POWER SOLUTIONS ULE-1.2/30-D48PM

ULE Series www.murata-pss.com Isolated, High Density, Eighth-Brick 1.25–20 Amp, DC-DC Converters Typical unit The ULE Series "Eighth-Brick" DC-DC Converters are high-current isolated power converters designed for use in high-density system boards. FEATURES PRODUCT OVERVIEW  Measuring just 0.89 × 2.22 × 0.36 inches (22.6 in heavy-copper pc boards all contribute to RoHS compliant × 56.4 × 9.1mm), these open-frame, low-profi le impressive thermal derating. The ULEs feature set  New 1/8-brick package, 1/4-brick pinout E-bricks fi t the industry-standard quarter-brick includes high isolation (2250Vdc, 48V models), in through-hole or SMT version footprint. Now you can “cut-and-paste” the layout input pi fi lters, input undervoltage shutdown,  0.89 x 2.22 x 0.36 in. (22.6 x 56.4 x 9.1mm) from your last Q-brick design to save time and save output overvoltage protection, current limiting,  44% board space (1.86 square inches versus 3.3) short-circuit protection, and thermal shutdown. The Output current: 1.25-20 Amps in the process. standard footprint carries VOUT trim, on/off control,  Output voltages: 1.5V to 48V From a 9-18V, 18-36V or 36-75V input, ULEs and sense pins (sense pins are not available on  Input voltage: 12V, 24V and 48V nominal deliver 1.5 to 48 Volt outputs with current up to 12V or higher models).  20 Amps. They employ an interleaved, synchro- All ULE E-Bricks are certifi ed to the BASIC- Interleaved, synchronous-rectifi er nous-rectifi er topology that exploits 100% of their insulation requirements of UL/EN/IEC60950-1, topology delivers:  Outstanding effi ciency (to 94%) duty cycle. They simultaneously achieve high 2nd edition, and all “D48” models (36-75V input  Low noise effi ciency, low noise, tight line/load regulation, and ranges) carry the CE mark. Safety certifi cations,  Stable no-load operation quick step response. EMC compliance testing and qualifi cation testing  No output reverse conduction An open-frame design, high effi ciency, low-on- are available. resistance FETs, and planar magnetics embedded  Excellent thermal performance  On/off control, trim and sense pins  Fully isolated (2250Vdc BASIC)  Fully I/O protected; Thermal shutdown  Certifi ed to UL/IEC/EN 60950-1 and CAN/CSA C22.2 No.60950-1, 2nd edition  Lead-free construction/attach For full details go to www.murata-ps.com/rohs www.murata-ps.com/support MDC_ULE Series.H03 Page 1 of 28 ULE Series Isolated, High Density, Eighth-Brick 1.25–20 Amp, DC-DC Converters PERFORMANCE SPECIFICATIONS SUMMARY AND ORDERING GUIDE Effi ciency Output Input VIN IIN no IIN full R/N (mVp-p)  Regulation (Max.) VOUT IOUT Power Nom. Range load load Model Family  (V) (A) (W) Typ. Max. Line Load (V) (V) (mA) (A) Min. Typ. ULE-1.5/20-D24xx-C 1.5 20 30 25 60 ±0.15% ±0.15% 24 18-36 40 1.42 86% 88% ULE-1.5/20-D48xx-C 1.5 20 30 25 60 ±0.15% ±0.15% 48 36-75 40 0.74 84% 84.5% ULE-1.8/20-D24xx-C 1.8 20 36 40 80 ±0.1% ±0.1% 24 18-36 40 1.72 85% 87% ULE-1.8/20-D48xx-C 1.8 20 36 40 80 ±0.25% ±0.25% 48 36-75 40 0.87 84.5% 86.5% ULE-2.5/20-D24xx-C 2.5 20 50 30 50 ±0.05% ±0.05% 24 18-36 95 2.35 87% 88.5% ULE-2.5/20-D48xx-C 2.5 20 50 50 75 ±0.05% ±0.1% 48 36-75 55 1.17 88% 89% ULE-3.3/20-D12x-C 3.3 66 60 100 ±0.05% ±0.05% 12 100 6.15 88.9% 89.4% 20  9-18  ULE-3.3/20-D12xM-C 3.3 20  66 60 100 ±0.05% ±0.05% 12 9-18  100 6.15 88.9% 89.4% ULE-3.3/20-D24x-C 3.3 20 66 50 80 ±0.05% ±0.05% 24 18-36 60 3.09 88% 89% ULE-3.3/20-D24xM-C 3.3 20 66 50 80 ±0.05% ±0.05% 24 18-36 60 3.09 88% 89% ULE-3.3/20-D48x-C 3.3 20 66 50 100 ±0.1% ±0.25% 48 36-75 60 1.54 87% 89% ULE-3.3/20-D48xM-C 3.3 20 66 50 100 ±0.1% ±0.25% 48 36-75 60 1.54 87% 89% ULE-5/10-D12x-C 5 10 50 60 125 ±0.05% ±0.05% 12 9-18 160 4.63 87% 90% ULE-5/12-D24x-C 5 12  60 50 100 ±0.1% ±0.25% 24 19-36  160 2.78 88% 90% ULE-5/12-D24xM-C 5 60 50 100 ±0.1% ±0.25% 24 160 2.78 88% 90% 12  19-36  ULE-5/12-D48x-C 5 12 60 50 100 ±0.1% ±0.25% 48 36-75 90 1.38 88.5% 90.5% ULE-5/12-D48xM-C 5 12 60 50 100 ±0.1% ±0.25% 48 36-75 90 1.38 88.5% 90.5% ULE-12/4.2-D24x-C 12 4.2  50.4 50 150 ±0.05% ±0.075% 24 18-36 55 2.31 89.5% 91% ULE-12/4.2-D24xM-C 12 50.4 50 150 ±0.05% ±0.075% 24 18-36 55 2.31 89.5% 91% 4.2  ULE-12/4.2-D48x-C 12 4.2 50.4 50 150 ±0.05% ±0.075% 48 36-75 55 1.14 91% 92% ULE-12/4.2-D48xM-C 12 4.2 50.4 50 150 ±0.05% ±0.075% 48 36-75 55 1.14 91% 92% ULE-24/3-D48x-C 24 3 72 400 700 ±0.3% ±1.25% 48 36-75 45 1.63 90.8% 92% ULE-48/1.25-D48x-C 48 1.25 60 640 750 ±0.175% ±3.2% 48 36-75 75 1.35 91% 92.5% ULE-48/1.25-D48xM-C 48 1.25 60 640 750 ±0.175% ±3.2% 48 36-75 75 1.35 91% 92.5%  Please refer to the full model number structure for additional ordering part numbers and  If VIN = 19−20V, IOUT = 8A Max. options.  Min. load = 10%.  All specifi cations are at nominal line voltage and full load, +25ºC unless otherwise noted.  If VIN = 9−10V, IOUT = 18A Max. See detailed specifi cations. ULE-1.2/30-D48N-C ULE-1.8/20-D24N-C ULE-12/4.2-D48NM-C ULE-3.3/20-D12PM ULE-48/1.25-D48NM-C ULE-1.2/30-D48P-C ULE-1.8/20-D24NM-C ULE-12/4.2-D48PM-C ULE-3.3/20-D12PM-C ULE-48/1.25-D48PM-C ULE-1.5/20-D24N-C ULE-1.8/20-D24P-C ULE-2.5/20-D24N-C ULE-3.3/20-D24PM-C ULE-5/10-D12N-C ULE-1.5/20-D24NM-C ULE-1.8/20-D24PM-C ULE-2.5/20-D24PM ULE-3.3/20-D48NM-C ULE-5/10-D12NM ULE-1.5/20-D24P-C ULE-1.8/20-D48N-C ULE-2.5/20-D24PM-C ULE-3.3/20-D48PM-C ULE-5/10-D12NM-C ULE-1.5/20-D24PM-C ULE-1.8/20-D48NL2-C ULE-2.5/20-D48N-C ULE-31103 ULE-5/10-D12P-C ULE-1.5/20-D48N-C ULE-2.5/20-D48NL2 ULE-31104 ULE-5/10-D12PM-C ULE-1.5/20-D48NM ULE-1.8/20-D48P ULE-2.5/20-D48NM-C ULE-31106 ULE-5/12-D24PM ULE-1.5/20-D48NM-C ULE-1.8/20-D48P-C ULE-2.5/20-D48P-C ULE-31131-C ULE-5/12-D24PM-C ULE-1.5/20-D48P-C ULE-1.8/20-D48PM-C ULE-2.5/20-D48PM ULE-31131-Y ULE-5/12-D48NM-C ULE-1.5/20-D48PM ULE-12/4.2-D24NM-C ULE-2.5/20-D48PM-C ULE-31199-C ULE-5/12-D48PM-C ULE-1.5/20-D48PM-C ULE-12/4.2-D24PM-C ULE-3.3/20-D12NM-C ULE-12/4.2-D48NL2-C ULE-12/4.2-D48PL1-C ULE-3.3/20-D48NL2-C ULE-3.3/20-D48NL1-C ULE-3.3/20-D48PL1-C ULE-3.3/20-D48PL2-C ULE-5/12-D48NL1-C ULE-5/12-D48NL2-C www.murata-ps.com/support MDC_ULE Series.H03 Page 2 of 28 ULE-1.8/20-D48NM-C ULE Series Isolated, High Density, Eighth-Brick 1.25–20 Amp, DC-DC Converters PART NUMBER STRUCTURE U LE - 1.5 / 20 - D48 N M Lx - C Output Confi guration: RoHS-6 hazardous substance compliant U = Unipolar/Single Output Does not claim EU RoHS exemption 7b, lead in solder Pin Length Option (Through-hole packages only) Blank = standard length 0.180˝ (4.6mm) Eighth-Brick Package L1 = Pin length 0.110±0.010˝ (2.79±0.25mm ➀ L2 = Pin length 0.145±0.010˝ (3.68±0.25mm) ➀ Nominal Output Voltage Surface (Gullwing) Mount Package ➁ (ULE-12/4.2-D48, ULE-24/3-D48, and ULE-48/1.25-D48 have no surface mount option.) Maximum Rated Output Remote On/Off Control Polarity: Current in Amps P = Positive polarity (standard for D12 and D24 models, optional special order for D48 models) Input Voltage Range: N = Negative polarity (standard for D48 models, D12 = 12V nominal optional special order for D12 and D24 models) D24 = 24V nominal D48 = 48V nominal ➀ Special quantity order is required; samples available with standard pin length only. ➁ SMT (M) versions not available in sample quantities. ➂ Some model number combinations may not be available. See website or contact your local Murata sales representative. www.murata-ps.com/support MDC_ULE Series.H03 Page 3 of 28 ULE Series Isolated, High Density, Eighth-Brick 1.25–20 Amp, DC-DC Converters FUNCTIONAL SPECIFICATIONS INPUT CHARACTERISTICS Load Current Remote On/Off Control Start-up Time Under Refl ected Inter- Start-up Voltage (back) Full Inrush nal Reverse Positive Negative VIN to VOUT Remote On/Off threshold Shut- Ripple Load Transient Output Low Standby Input Polarity Cur- Logic Logic regulated to VOUT regu- Min. down Current Condi- Conditions Short No Load Line Mode Filter Protec- rent “P” model “N” model (Max.) lated (Max.) 2 Model Family  (V) (V) (mA) tions (A sec) Circuit (mA) (A) (mA) Type tion (mA) suffi x suffi x mSec mSec ULE-1.5/20-D24  17.0 16.0 1.96 ULE-1.5/20-D48 34.0 33.0 0.98 17.0 16.0 2.3 ULE-1.8/20-D24  ULE-1.8/20-D48 33.0 31.0 1.16 ULE-2.5/20-D24 17.0 16.0 3.23 ULE-2.5/20-D48 33.0 32.0 1.55 ULE-3.3/20-D12 8.5 8.0 7.42 OFF=Ground pin OFF=open or 6-90, model 6-90, model 40−250 40−160 1−8 None, 15−45, See to +0.8V max. +3.5V to dependent dependent ULE-3.3/20-D24 17.0 16.0 4.10 model model model install model Ordering 0.5−1 L-C 1.0 ON=open or +13.5V max. depen- depen- depen- external ULE-3.3/20-D48 34.5 33.5 2.05 dependent Guide 3.5V to +13.5V ON=Ground pin dent dent dent fuse max. to +0.8V max. ULE-5/10-D12 8.5 8.0 6.14 ULE-5/12-D24 19.0 17.5 3.30 ULE-5/12-D48 34.5 33.5 1.82 ULE-12/4.2-D24 17.0 16.0 3.04 ULE-12/4.2-D48 35.0 34.0 1.51 ULE-24/3-D48 35.0 33.0 2.17 150 150 ULE-48/1.25-D48 35.0 33.5 1.46 6-90 6-90 OUTPUT CHARACTERISTICS Capacitive Loading Current Limit VOUT Max. Inception Accuracy Low ESR <0.02Ω Max. Ripple/Noise 98% of VOUT VOUT 50% Load resistive load Adjustment Temperature Minimum Remote Sense (20 MHz Line/Load after warmup Model Family (V) % of VNOM (μF) Range Coeffi cient Loading Compensation bandwidth) Regulation Effi ciency (A) ULE-1.5/20-D24 1.5 24 ULE-1.5/20-D48 1.5 24 ULE-1.8/20-D24 1.8 24 ULE-1.8/20-D48 1.8 25 ULE-2.5/20-D24 2.5 24 ULE-2.5/20-D48 2.5 24 No Minimum 10,000 +10% Load ULE-3.3/20-D12 3.3 24 ±1 to ±2 −20 to +10% ULE-3.3/20-D24 3.3 24 of VNOM, ±0.02% of of VNOM, model See Ordering Guide model VOUT range/°C ULE-3.3/20-D48 3.3 26 dependent dependent ULE-5/10-D12 5 13 ULE-5/12-D24 5 15 ULE-5/12-D48 5 16 ULE-12/4.2-D24 12 6 2000 420 mA ULE-12/4.2-D48 12 6.25 none ULE-24/3-D48 24 680 300 mA 4.25 ULE-48/1.25-D48 48 470 No Minimum 2.5 See notes on page 5. www.murata-ps.com/support MDC_ULE Series.H03 Page 4 of 28 ULE Series Isolated, High Density, Eighth-Brick 1.25–20 Amp, DC-DC Converters ISOLATION CHARACTERISTICS DYNAMIC CHARACTERISTICS Input to Switching Output Isolation Isolation Dynamic Load Response Frequency Min. Resistance Capacitance Isolation Model Family (50-75-50% load step) KHz Model Family (V) (MΩ) (pF) Safety Rating ULE-1.5/20-D24 100μSec to ±1.5% of fi nal value 280±15 ULE-1.5/20-D24 ULE-1.5/20-D48 100μSec to ±1.5% of fi nal value 280±15 ULE-1.5/20-D48 ULE-1.8/20-D24 100μSec to ±1.5% of fi nal value 340±15 ULE-1.8/20-D24 ULE-1.8/20-D48 100μSec to ±1.5% of fi nal value 340±15 ULE-1.8/20-D48 ULE-2.5/20-D24 150μSec to ±1% of fi nal value 385±15 ULE-2.5/20-D24 1750 ULE-2.5/20-D48 ULE-2.5/20-D48 80μSec to ±1.5% of fi nal value 385±45 ULE-3.3/20-D12 150μSec to ±1.25% of fi nal value 310±15 ULE-3.3/20-D12 2000- ULE-3.3/20-D24 150μSec to ±1.5% of fi nal value 385±15 ULE-3.3/20-D24 2250 min., Basic 100 model Insulation ULE-3.3/20-D48 ULE-3.3/20-D48 150μSec to ±1% of fi nal value 365±15 dependent ULE-5/10-D12 ULE-5/10-D12 75μSec to ±2% of fi nal value 325±15 470 ULE-5/12-D24 75μSec to ±2% of fi nal value 450±15 ULE-5/12-D24 ULE-5/12-D48 ULE-5/12-D48 100μSec to ±1% of fi nal value 450±15 ULE-12/4.2-D24 1750 ULE-12/4.2-D24 150μSec to ±1.25% of fi nal value 400±15 ULE-12/4.2-D48 ULE-12/4.2-D48 150μSec to ±1.25% of fi nal value 380±15 ULE-24/3-D48 2000 ULE-24/3-D48 200μSec to ±2% of fi nal value 240±30 ULE-48/1.25-D48 1500 ULE-48/1.25-D48 200μSec to ±1% of fi nal value 250±15 MISCELLANEOUS CHARACTERISTICS Overvoltage Operating Temperature Range 12 Protection Operating PCB Storage Thermal Short via magnetic Short Circuit Calculated See Temperature Temperature Protection/ Circuit feedback Protection Short Circuit Relative 16 Model Family MTBF derating curves (no derating) Range Shutdown Current (V) Method  Duration Humidity ULE-1.5/20-D24 3A 2.3 ULE-1.5/20-D48 3A 2.0 ULE-1.8/20-D24 3A 2.3 ULE-1.8/20-D48 3A 2.3 ULE-2.5/20-D24 3A 3.5 ULE-2.5/20-D48 3A 3.0 Current ULE-3.3/20-D12 300mA 3.96 limiting, Continuous, +105 to To hiccup output ULE-3.3/20-D24 3A 3.96 −40 to −55 to +125ºC, +85ºC/85% TBC −40 to +85ºC with derating autorestart. shorted to +105ºC +125ºC model non- ULE-3.3/20-D48 3A 3.96 Remove ground. dependent condensing overload for No damage. ULE-5/10-D12 5A 6.0 recovery ULE-5/12-D24 5A 6.0 ULE-5/12-D48 2A 6.4 ULE-12/4.2-D24 3A 15.0 ULE-12/4.2-D48 3A 14.0 ULE-24/3-D48* 0.65A 28.0 ULE-48/1.25-D48 500mA 55.0 *No derating is required up to 85°C. See notes on page 5. www.murata-ps.com/support MDC_ULE Series.H03 Page 5 of 28 ULE Series Isolated, High Density, Eighth-Brick 1.25–20 Amp, DC-DC Converters FUNCTIONAL SPECIFICATION NOTES 1. All models are tested and specifi ed with external 1||10 μF ceramic/tantalum output 8. Output noise may be further reduced by adding an external fi lter. See I/O Filtering capacitors and a 22 μF external input capacitor. All capacitors are low ESR types. and Noise Reduction. These capacitors are necessary to accommodate our test equipment and may not 9. All models are fully operational and meet published specifi cations, including “cold be required to achieve specifi ed performance in your applications. The ULE-12/4.2 start” at –40ºC. and ULE-24/3 modules require minimum load; all other models regulate within spec 10. Regulation specifi cations describe the deviation as the line input voltage or output and are stable under no-load to full load conditions. General conditions for Specifi - load current is varied from a nominal midpoint value to either extreme. cations are +25 deg.C, VIN=nominal, VOUT=nominal, full load. Adequate airfl ow must 11. Alternate pin length and/or other output voltages are available under special quantity be supplied for extended testing under power. order. 2. Input Ripple Current is tested and specifi ed over a 5 Hz to 20 MHz bandwidth. Input 12. Electronic overvoltage shutdown is not included on 48V input models to comply fi ltering is CIN=33 μF tantalum, CBUS=220 μF electrolytic, LBUS=12 μH. with certain telecom reliability requirements. These requirements attempt continued 3. Note that Maximum Power Derating curves indicate an average current at nominal operation despite input overvoltage. The converter is rated only to the maximum input voltage. At higher temperatures and/or lower airfl ow, the DC-DC converter will input voltage. tolerate brief full current outputs if the total RMS current over time does not exceed 13. Do not exceed maximum power specifi cations when adjusting the output trim. the Derating curve. All Derating curves are presented at sea level altitude. Be aware 14. At zero output current, the output may contain low frequency components which of reduced power dissipation with increasing density altitude. exceed the ripple specifi cation. The output may be operated indefi nitely with no load. 4. Mean Time Before Failure is calculated using the Telcordia (Belcore) SR-332 Method 1, 15. If reverse polarity is accidentally applied to the input, a body diode will become Case 3, ground fi xed conditions, Tpcboard=+25ºC, full output load, natural air convection. forward biased and will conduct considerable current. To ensure reverse input 5. The On/Off Control is normally controlled by a switch. But it may also be driven with protection with full output load, always connect an external input fuse in series with external logic or by applying appropriate external voltages which are referenced to the +VIN input. Use approximately twice the full input current rating with nominal Input Common. The On/Off Control Input should use either an open collector or open input voltage. drain transistor. 16. Output current limit is non-latching. When the overcurrent fault is removed, the 6. Short circuit shutdown begins when the output voltage degrades approximately 2% converter will immediately recover. from the selected setting. 17. The Sense inputs are not included on lower current output models. 7. The outputs are not intended to sink appreciable reverse current.. 18. ULE-5/12-D24 IOUT=8A max. if VIN=19-20V. PHYSICAL CHARACTERISTICS AND SAFETY Outline dimensions See mechanical specs (below) Pin material Copper alloy Pin diameter 0.04/0.062" (1.016/1.524mm) Pin fi nish Nickel underplate with gold overplate Weight 1 ounce (28 grams) Electromagnetic interference (external fi lter required) Designed to meet EN55022/CISPR22 with external fi lter Safety Certifi ed to UL/cUL 60950-1, CSA-C22.2 No. 60950-1, IEC/EN 60950-1, 2nd edition Absolute Maximum Ratings Input Voltage: Continuous: 12 Volt input models 18 Volts 24 Volt input models 36 Volts 48 Volt input models 75 Volts Transient (100 mSec. Max.) 12 Volt input models 25 Volts 24 Volt input models 50 Volts 48 Volt input models 100 Volts On/Off Control (pin 2) See specifi cations Input Reverse Polarity Protection 5 Amps, 10 sec. max. Output Overvoltage Protection Magnetic feedback. See note (7). Output Current * Current-limited. Devices can with stand sustained short circuit without damage. Storage Temperature –55 to +125°C. Lead Temperature Refer to solder profi le. These are stress ratings. Exposure of devices to greater than any of these conditions may adversely affect long-term reliability. Proper operation under conditions other than those listed in the Performance/Functional Specifi cations Table is not implied. * The outputs are not intended to sink reverse current. www.murata-ps.com/support MDC_ULE Series.H03 Page 6 of 28 ULE Series Isolated, High Density, Eighth-Brick 1.25–20 Amp, DC-DC Converters TYPICAL PERFORMANCE CURVES ULE-1.5/20-D48N ULE-1.5/20-D48 Maximum Current Temperature Derating Efficiency vs. Line Voltage and Load Current @ +25°C (VIN = 48V, air flow direction is transverse) 25 90 88 86 20 84 100 lfm 82 15 200 lfm 80 VIN = 36V 300 lfm 78 10 400 lfm VIN = 48V 76 VIN = 75V 74 5 72 70 0 2 4 6 8 10 12 14 16 18 20 30 40 50 60 70 80 –40 0 25 35 45 55 65 75 85 Load Current (Amps) Ambient Temperature (°C) 5,%  $ 5,%  $-AXIMUM#URRENT4EMPERATURE$ERATING %FFICIENCYVS,INE6OLTAGEAND,OAD#URRENT —# 6).6AIRFLOWDIRECTIONISTRANSVERSE         .ATURAL#ONVECTION 6).6 LFM   6).6  LFM LFM    6).6                 n         ,OAD#URRENT!MPS !MBIENT4EMPERATUREo# ULE-2.5/20-D24N ULE-2.5/20-D24N Maximum Current Temperature Derating Efficiency vs. Line Voltage and Load Current @ +25°C VIN = 24V, transverse air flow at sea level 92 20 90 19.5 88 19 86 Natural convection 100 lfm 18.5 200 lfm 84 VIN = 19V 300 lfm 400 lfm 82 18 VIN = 24V 80 17.5 VIN = 36V 78 17 76 74 16.5 20 25 30 40 35 45 50 60 55 65 70 80 75 85 2 4 6 8 10 12 14 16 18 20 Load Current (Amps) Ambient Temperature (°C) www.murata-ps.com/support MDC_ULE Series.H03 Page 7 of 28 Efficiency (%) %FFICIENCY Efficiency (%) Output Current (Amps) /UTPUT#URRENT!MPS Output Current (Amps) ULE Series Isolated, High Density, Eighth-Brick 1.25–20 Amp, DC-DC Converters TYPICAL PERFORMANCE CURVES 5,%  $ 5,%  $-AXIMUM#URRENT4EMPERATURE$ERATING %FFICIENCYVS,INE6OLTAGEAND,OAD#URRENT —# 6).6AIRFLOWDIRECTIONISTRANSVERSE         LFM 6).6   6).6 LFM  LFM  6).6                     n         ,OAD#URRENT!MPS !MBIENT4EMPERATUREo# 5,%  $ 5,%  $-AXIMUM#URRENT4EMPERATURE$ERATING %FFICIENCYVS,INE6OLTAGEAND,OAD#URRENT —# 6).6AIRFLOWDIRECTIONISTRANSVERSE          .ATURAL#ONVECTION   LFM 6).6   LFM  6).6   LFM 6).6                       n         ,OAD#URRENT!MPS !MBIENT4EMPERATUREo# 5,%  $ 5,%  $-AXIMUM#URRENT4EMPERATURE$ERATING %FFICIENCYVS,INE6OLTAGEAND,OAD#URRENT —# 6).6AIRFLOWDIRECTIONISTRANSVERSE        LFM 6).6   6).6 LFM LFM  6).6                    n         ,OAD#URRENT!MPS !MBIENT4EMPERATUREo# www.murata-ps.com/support MDC_ULE Series.H03 Page 8 of 28 %FFICIENCY %FFICIENCY %FFICIENCY /UTPUT#URRENT!MPS /UTPUT#URRENT!MPS /UTPUT#URRENT!MPS ULE Series Isolated, High Density, Eighth-Brick 1.25–20 Amp, DC-DC Converters TYPICAL PERFORMANCE CURVES 5,%  $ 5,%  $-AXIMUM#URRENT4EMPERATURE$ERATING %FFICIENCYVS,INE6OLTAGEAND,OAD#URRENT —# 6).6AIRFLOWDIRECTIONISTRANSVERSE      LFM    6).6 LFM LFM   LFM 6).6     6).6                   n         ,OAD#URRENT!MPS !MBIENT4EMPERATUREo# 5,%  $-AXIMUM#URRENT4EMPERATURE$ERATING ULE-5/10-D12 Efficiency vs. Line Voltage and Load Current @ +25°C 6).6AIRFLOWDIRECTIONISTRANSVERSE  94 92  90 88  .ATURALCONVECTION 86 VIN = 9V  84 LFM VIN = 12V LFM 82  VIN = 18V LFM 80 78  1.2 2.4 3.6 4.8 6 7.2 8.4 9.6 10.8 12 n               !MBIENT4EMPERATUREo# Load Current (Amps) 5,%  $ 5,%  $-AXIMUM#URRENT4EMPERATURE$ERATING %FFICIENCYVS,INE6OLTAGEAND,OAD#URRENT —# 6).6AIRFLOWDIRECTIONFROMINPUTTOOUTPUT      LFM   6).6  LFM     LFM 6).6    6).6                    n         ,OAD#URRENT!MPS !MBIENT4EMPERATUREo# www.murata-ps.com/support MDC_ULE Series.H03 Page 9 of 28 %FFICIENCY Efficiency (%) %FFICIENCY /UTPUT#URRENT!MPS /UTPUT#URRENT!MPS /UTPUT#URRENT!MPS ULE Series Isolated, High Density, Eighth-Brick 1.25–20 Amp, DC-DC Converters TYPICAL PERFORMANCE CURVES 5,%  $ ULE-5/12-D48 Maximum Current Temperature Derating %FFICIENCYVS,INE6OLTAGEAND,OAD#URRENT —# (VIN = 48V, air flow direction from input to output) 12.5  12  11.5 6).6 11  10.5 100 lfm  6).6 10 200 lfm 9.5  6).6 9  300 lfm 8.5 8             –40 0 30 40 35 45 50 60 55 65 70 80 75 85 90 ,OAD#URRENT!MPS Ambient Temperature (oC) ULE-12/4.2-D24 ULE-12/4.2-D24N Maximum Current Temperature Derating Efficiency Vs. Line Voltage and Load Current @25ºC (VIN=24V, transverse airflow at sea level) 4.2 94 4.1 92 4.0 90 3.9 Natural convection 88 100 lfm 3.8 200 lfm 86 300 lfm 3.7 VIN = 18V 400 lfm 84 VIN = 24V 3.6 VIN = 26V 82 3.5 80 3.4 78 3.3 3.2 76 20 25 30 35 45 40 50 55 65 60 70 75 85 80 90 0.20 0.60 1.00 1.40 1.80 2.20 2.60 3.00 3.40 3.80 4.20 Load Current (Amps) Ambient Temperature (°C) 5,%  $ ULE-12/4.2-D48N Maximum Current Temperature Derating %FFICIENCYVS,INE6OLTAGEAND,OAD#URRENT —# (VIN=48V, transverse airflow at sea level)  4.5  4.0  3.5   3.0  Natural convection 2.5 100 lfm  200 lfm  300 lfm 2.0 6).6 400 lfm  1.5  6).6  1.0 6).6  0.5   0 20 25 30 35 45 40 50 55 65 60 70 75 85 80 90            ,OAD#URRENT!MPS Ambient Temperature (°C) www.murata-ps.com/support MDC_ULE Series.H03 Page 10 of 28 %FFICIENCY Efficiency (%) %FFICIENCY Output Current (Amps) Output Current (Amps) Output Current (Amps) ULE Series Isolated, High Density, Eighth-Brick 1.25–20 Amp, DC-DC Converters TYPICAL PERFORMANCE CURVES ULE-24/3-D48 ULE-24/3-D48N-C Temperature Derating Vin 36 (air flow from Pin 1 to Pin 3 on PCB) Efficiency vs. Line Voltage and Load Current @ +25°C 4 93 92 3 91 90 Natural Convection 89 0.5 m/s (100 LFM); 1.0 m/s (200 LFM); 2 VIN = 36V 1.5 m/s (300 LFM); 2.0 m/s (400 LFM) 88 VIN = 48V VIN = 60V 87 VIN = 75V 1 86 85 0 84 30 35 40 45 50 55 60 65 70 75 80 85 0.3 0.65 1 1.3 1.65 2 2.3 2.65 3 Ambient Temperature (°C) Load Current (Amps) ULE-24/3-D48N-C Temperature Derating ULE-24/3-D48N-C Temperature Derating Vin 48 (air flow from Pin 1 to Pin 3 on PCB) Vin 60 (air flow from Pin 1 to Pin 3 on PCB) 4 4 3 3 Natural Convection Natural Convection 2 2 0.5 m/s (100 LFM); 1.0 m/s (200 LFM); 0.5 m/s (100 LFM); 1.0 m/s (200 LFM); 1.5 m/s (300 LFM); 2.0 m/s (400 LFM) 1.5 m/s (300 LFM); 2.0 m/s (400 LFM) 1 1 0 0 30 35 40 45 50 55 60 65 70 75 80 85 30 35 40 45 50 55 60 65 70 75 80 85 Ambient Temperature (°C) Ambient Temperature (°C) ULE-24/3-D48N-C Temperature Derating ULE-48/1.25-D48 Vin 72 (air flow from Pin 1 to Pin 3 on PCB) Efficiency vs. Line Voltage and Load Current @ +25°C 4 92 90 3 88 86 Natural Convection 84 2 0.5 m/s (100 LFM); 1.0 m/s (200 LFM); VIN = 36V 82 1.5 m/s (300 LFM); 2.0 m/s (400 LFM) VIN = 48V 80 VIN = 60V VIN = 75V 78 1 76 74 72 0 70 30 35 40 45 50 55 60 65 70 75 80 85 0.10 0.22 0.33 0.45 0.56 0.68 0.79 0.91 1.02 1.14 1.25 Ambient Temperature (°C) Load Current (Amps) www.murata-ps.com/support MDC_ULE Series.H03 Page 11 of 28 Efficiency (%) Output Current (Amps) Output Current (Amps) Output Current (Amps) Output Current (Amps) Efficiency (%) ULE Series Isolated, High Density, Eighth-Brick 1.25–20 Amp, DC-DC Converters TYPICAL PERFORMANCE CURVES 5,%  $0OWER$ISSIPATIONVS,OAD#URRENT —# 5,%  $0OWER$ISSIPATIONVS,OAD#URRENT —#     6).6 6).6  6).6  6).6  6).6 6).6                               ,OAD#URRENT!MPS ,OAD#URRENT!MPS 5,%  $0OWER$ISSIPATIONVS,OAD#URRENT —# 5,%  $0OWER$ISSIPATIONVS,OAD#URRENT —#     6).6 6).6   6).6 6).6   6).6 6).6                                 ,OAD#URRENT!MPS ,OAD#URRENT!MPS www.murata-ps.com/support MDC_ULE Series.H03 Page 12 of 28 0OWER$ISSIPATION7ATTS 0OWER$ISSIPATION7ATTS 0OWER$ISSIPATION7ATTS 0OWER$ISSIPATION7ATTS ULE Series Isolated, High Density, Eighth-Brick 1.25–20 Amp, DC-DC Converters TYPICAL PERFORMANCE CURVES 5,%  $0OWER$ISSIPATIONVS,OAD#URRENT —# 5,%  $0OWER$ISSIPATIONVS,OAD#URRENT —#     6).6 6).6  6).6 6).6   6).6 6).6                                  ,OAD#URRENT!MPS ,OAD#URRENT!MPS 5,%  $0OWER$ISSIPATIONVS,OAD#URRENT —# 5,%  $0OWER$ISSIPATIONVS,OAD#URRENT —#    6).6 6).6  6).6  6).6  6).6  6).6                                 ,OAD#URRENT!MPS ,OAD#URRENT!MPS www.murata-ps.com/support MDC_ULE Series.H03 Page 13 of 28 0OWER$ISSIPATION7ATTS 0OWER$ISSIPATION7ATTS 0OWER$ISSIPATION7ATTS 0OWER$ISSIPATION7ATTS ULE Series Isolated, High Density, Eighth-Brick 1.25–20 Amp, DC-DC Converters TYPICAL PERFORMANCE CURVES 5,%  $0OWER$ISSIPATIONVS,OAD#URRENT —# ULE-24/3-D48 Power Dissipation vs. Load Current @ +25°C 6.5  6  5.5 6).6 VIN = 75V  VIN = 60V 5  6).6 VIN = 48V 4.5 VIN = 36V  6).6 4  3.5  3  2.5  2  1.5  1            0.3 0.65 1 1.3 1.65 2 2.3 2.65 3 ,OAD#URRENT!MPS Load Current (Amps) ULE-48/1.25-D48 Maximum Current Temperature Derating at sea level ULE-48/1.25-D48 Power Dissipation vs. Load Current @ +25°C 7 1.25 6 1.0 VIN = 75V VIN = 60V 5 Natural convection VIN = 48V VIN = 36V 0.75 100 lfm 4 0.5 3 0.25 2 1 0 0.1 0.2 0.3 0.4 0.6 0.7 0.8 0.9 1.0 1.1 1.3 0 20 40 60 80 100 120 Load Current (Amps) Ambient Temperature (°C) www.murata-ps.com/support MDC_ULE Series.H03 Page 14 of 28 Power Dissipation (Watts) 0OWER$ISSIPATION7ATTS Output Current (Amps) Power Dissipation (Watts) ULE Series Isolated, High Density, Eighth-Brick 1.25–20 Amp, DC-DC Converters MECHANICAL SPECIFICATIONS The ULE series consist of a number of unique high performance designs The block diagrams below are typical examples and are not intended to be sharing similar mechanical outlines and pinouts. The internal architecture exact representations. Some models do not include Sense and Trim pins. Please uses several different topologies including push-pull, fl yback and others. be aware that Murata Power Solutions may change these designs as needed. ULE-3.3/20-D48N +SENSE +VIN +VOUT GATE DRIVE FEEDBACK –VIN −VOUT −SENSE PWM CONTROLLER OPTO REFERENCE & ON/OFF TRIM ISOLATION ERROR AMP CONTROL UV, OV AND OVER-TEMPERATURE COMPARATORS Typical topology is shown. ULE-12/4.2-D48N +VIN +VOUT –VIN −VOUT ON/OFF FEEDBACK CONTROL PWM CONTROLLER REFERENCE & TRIM ERROR AMP UV, OV AND OVER-TEMPERATURE COMPARATORS Typical topology is shown. www.murata-ps.com/support MDC_ULE Series.H03 Page 15 of 28 ULE Series Isolated, High Density, Eighth-Brick 1.25–20 Amp, DC-DC Converters MECHANICAL SPECIFICATIONS ULE-24/3-D48N and ULE-48/1.25-D48N +VIN –VIN ON/OFF CONTROL FEEDBACK +VOUT PWM CONTROLLER −VOUT UV, OV AND OVER-TEMPERATURE COMPARATORS OPTO REFERENCE & ISOLATION ERROR AMP Typical topology is shown. www.murata-ps.com/support MDC_ULE Series.H03 Page 16 of 28 ULE Series Isolated, High Density, Eighth-Brick 1.25–20 Amp, DC-DC Converters MECHANICAL SPECIFICATIONS Through-hole Pin Changes for 2008 Extruded 0.040-inch Pin Confi gurations In 2008, for through-hole models only, Murata Power Solutions will gradually RoHS Models (-C) 0.040" Pin depth* phase over to a different extruded 0.040” (1.02 mm) diameter pin design and ULE-1.5/20-D24P-C 0.25 (6.4) elimination of the spacer standoffs on most models. This will have no effect on ULE-1.5/20-D48-C 0.25 (6.4) installation, interchangeability, electrical or mechanical specifi cations. Any ULE-1.8/20-D24-C 0.25 (6.4) machined 0.062” (1.57 mm) diameter pin will transition to a straight wire 0.062” ULE-1.8/20-D48-C 0.25 (6.4) pin. The new 0.040” pins will insert properly to existing host PC boards and ULE-2.5/20-D24-C 0.19 (4.8) include an integral pin shoulder to form the mounting plane (Figure 1). There is ULE-2.5/20-D48-C 0.19 (4.8) no model number change, only a slightly changed appearance. Use the drawings ULE-3.3/20-D12-C 0.19 (4.8) and table below to identify the new pin design. And, surface mount ULEs are not ULE-3.3/20-D24-C 0.25 (6.4) affected. ULE-3.3/20-D48N-C 0.25 (6.4) Dimensions in inches (mm) ULE-3.3/20-D48P-C 0.19 (4.8) All new production models are RoHS-6 compliant and always use the –C ULE-5/10-D12-C 0.19 (4.8) model number suffi x. Older non-RoHS models are also being changed over to ULE-5/12-D24-C 0.19 (4.8) the new extruded pins; however non-RoHS models are not listed in this table. ULE-5/12-D48-C 0.25 (6.4) 0.040 (1.02) dia. pin ULE-12/4.2-D24-C 0.25 (6.4) ULE-12/4.2-D48-C 0.25 (6.4) Pin shoulder, 0.072 ±0.002 dia. (1.83 ±0.05) ULE-24/3-D48N-C 0.25 (6.4) ULE Converter ULE-48/1.25-D48-C 0.25 (6.4) Seating plane *The “0.040-inch pin depth” is the distance between the mounting plane of the ULE converter (at the pin shoulder) and the inserted tip of the pin. Therefore it is the length of pin which the host receiving PC board must accept. The ULE mounting plane interfaces User’s host to the top mounting surface (seating plane) of the user’s PC board. The ULE mounting Keep-out area PC Board Pin depth, see table plane is established either by an integral pin shoulder (new) or a plastic standoff (older) but not both. Users should avoid placing components immediately below the converter. Dimensions are in inches (mm) Drawing not to scale The pin fi nish for all models remains as gold plate over nickel underplate. Figure 1. Extruded 0.040-inch Pin The pin material is a copper alloy. The pin fi nish is suitable for both leaded The “integral” pin shoulder is formed as part of the extruded pin fabrica- and lead-free solders. tion and replaces the plastic standoff spacer. The shoulder diameter is 0.072 +/−0.002" and forms the mounting plane of the converter. The user should provide suffi cient clearance for a 0.040" pin hole but well below the 0.072" shoulder diameter. This mounting plane avoids mechanical stress placed on the converter components. Do not place the components below the converter. Iout Vout Number On/Off Trim Sense Model Number (Amps, (Volts) of Pins pin? pin? pins? max.) ULE Connections ULE-1.5/20-D24P-C 1.5 20 8 yes yes yes The ULE series consists of several different PC board layouts sharing a ULE-1.5/20-D48N-C 1.5 20 8 yes yes yes common outline specifi cation and overall size. This simplifi es interchange- ULE-1.8/20-D24P-C 1.8 20 8 yes yes yes ability in case the user needs different input or output specifi cations. ULE-1.8/20-D48N-C 1.8 20 8 yes yes yes ULE-2.5/20-D24P-C 2.5 20 8 yes yes yes Certain models do not include Sense or Trim connections. All models ULE-2.5/20-D48N-C 2.5 20 8 yes yes yes include Remote On/Off control pins. Please refer to the following table: ULE-3.3/20-D12P-C 3.3 20 8 yes yes yes ULE-3.3/20-D24P-C 3.3 20 8 yes yes yes ULE-3.3/20-D48N-C 3.3 20 8 yes yes yes ULE-5/10-D12P-C 5 10 8 yes yes yes ULE-5/12-D24P-C 5 12 8 yes yes yes ULE-5/12-D48N-C 5 12 8 yes yes yes ULE-12/4.2-D24P-C 12 4.2 6 yes yes no ULE-12/4.2-D48N-C 12 4.2 6 yes yes no ULE-24/3-D48N-C 24 3 5 yes no no ULE-48/1.25-D48N-C 48 1.25 5 yes no no www.murata-ps.com/support MDC_ULE Series.H03 Page 17 of 28 ULE Series Isolated, High Density, Eighth-Brick 1.25–20 Amp, DC-DC Converters MECHANICAL SPECIFICATIONS, THROUGH-HOLE (PINNED) MODELS END VIEW SIDE VIEW See Table 1.02±0.05 0.040±0.002 1.57±0.05 4.78 0.062±0.002 PINS 1-3, 5-7 0.188 PINS 4 & 8 1.80±0.05 MOUNTING PLANE 0.071±.002 SHOULDER AT PINS 1-3, 5-7 PIN 4 DOSA-Compliant Input/Output Connections † 56.4 PIN 5 2.22 Pin Function PIN 3 3.81 50.80 1 +Vin 0.150 2.000 2 On/Off Control* 3 −Vin 7.62 7.62 22.6 4 −Vout 0.300 0.300 ** 0.89 7.62 7.62 5 −Sense 0.300 0.300 † 6 Trim 3.81 7 +Sense** 0.150 BOTTOM VIEW 8 +Vout PIN 2 PIN 6 * The Remote On/Off can be provided † with either positive (P suffi x) or negative PIN 7 (N suffi x) polarity. PIN 1 PIN 8 ** Sense Pins omitted for 12Vout, 24Vout, and 48Vout models. † Trim pin omitted for 24Vout and 48Vout RECOMMENDED FOOTPRINT models. 0.083±0.010 (VIEW THROUGH CONVERTER) PLATED THRU HOLES 2x (Pins 4 & 8) .061±.010 TYP PLATED THRU HOLES 3.81 0.150 8 1 7.62 7** 22.9 2 0.300 C 6† L 0.90 7.62 11.4 5** 3 0.300 0.45 4 3.81 0.150 C L 50.80 3.81 2.000 0.150 58.4 2.30 ISOMETRIC VIEW DIMENSIONS ARE IN INCHES [mm] THIRD ANGLE PROJECTION TOLERANCES: 2 PLACE 0.02 ANGLES: 1 3 PLACE 0.010 COMPONENTS SHOWN ARE FOR REFERENCE ONLY MATERIAL: SMT PINS: COPPER ALLOY FINISH: (ALL PINS) GOLD (5u"MIN) OVER NICKEL (50u" MIN) www.murata-ps.com/support MDC_ULE Series.H03 Page 18 of 28 ULE Series Isolated, High Density, Eighth-Brick 1.25–20 Amp, DC-DC Converters MECHANICAL SPECIFICATIONS, SURFACE-MOUNT (GULLWING) MODELS END VIEW SIDE VIEW 0.63 0.025 See Table PINS COPLANAR WITHIN 0.004" PIN 4 58.4 2.30 Input/Output Connections PIN 5** PIN 3 Pin Function 0.125 TYP 3.81 1 +Vin 0.150 2 On/Off Control* 7.62 7.62 3 −Vin 22.6 0.300 0.300 4 −Vout 0.89 7.62 7.62 ** 5 −Sense 0.300 0.300 † 6 Trim 3.81 7 +Sense** 0.150 BOTTOM VIEW PIN 2 8 +Vout PIN 6 * The Remote On/Off can be provided PIN 1 PIN 7** with either positive (P suffi x) or negative (N suffi x) polarity. PIN 8 ** Sense Pins omitted for 12Vout, 24Vout, and 48Vout models. RECOMMENDED FOOTPRINT † Trim pin omitted for 24Vout and 48Vout (VIEW THROUGH CONVERTER) models. 59.44 2.340 Please refer to the “ULE Connections” table. 4.64 4.64 3.81 0.183 0.183 0.150 C L 1 8 7.62 7.62 7** 22.9 0.300 0.300 C 2 6† L 0.90 7.62 7.62 5** 0.300 0.300 3 4 3.30 0.51 3.81 0.130 0.020 0.150 58.4 2.30 ISOMETRIC VIEW DIMENSIONS ARE IN INCHES [mm] THIRD ANGLE PROJECTION TOLERANCES: 2 PLACE 0.02 ANGLES: 1 3 PLACE 0.010 COMPONENTS SHOWN ARE FOR REFERENCE ONLY MATERIAL: SMT PINS: COPPER ALLOY FINISH: (ALL PINS) PURE TIN (100u"MIN) OVER NICKEL (75u" MIN) www.murata-ps.com/support MDC_ULE Series.H03 Page 19 of 28 ULE Series Isolated, High Density, Eighth-Brick 1.25–20 Amp, DC-DC Converters MECHANICAL SPECIFICATIONS, Continued THRU-HOLE STANDARD PACKAGE 0.122 REF OR 0.150 REF* NOMINAL DEPENDING ON MODEL See Table ULE THRU-HOLE SERIES MAXIMUM HEIGHTS Model Family Height (Max) Model Family Height (Max) ULE-1.5/20-D24 0.404 [10.26] *ULE-5/12-D24 0.405 [10.29] ULE-1.5/20-D48 0.381 [9.68] ULE-5/12-D48 0.377 [9.58] ULE-1.8/20-D24 0.404 [10.26] ULE-12/4.2-D24 0.377 [9.58] ULE-1.8/20-D48 0.381 [9.68] ULE-12/4.2-D48 0.377 [9.58] ULE-2.5/20-D24* 0.409 [10.39] ULE-24/3-D48 0.425 [10.80] ULE-2.5/20-D48* 0.409 [10.39] ULE-48/1.25-D48 0.448 [11.38] ULE-3.3/20-D12* 0.409 [10.39] ULE-68/1.5-D48 0.377 [9.58] ULE-3.3/20-D24 0.381 [9.68] ULE-3.3/20-D48* 0.409 [10.39] TYPE 'M' GULL WING SMT PACKAGE See Table 0.130 REF ULE 'M' TYPE SMT (GULL WING) SERIES MAXIMUM HEIGHTS Model Family Height (Max) Model Family Height (Max) ULE-1.5/20-D24 M 0.404 [10.26] ULE-5/10-D12 M 0.400 [10.16] ULE-1.5/20-D48 M 0.404 [10.26] ULE-5/12-D24 M 0.400 [10.16] ULE-1.8/20-D24 M 0.404 [10.26] ULE-5/12-D48 M 0.400 [10.16] ULE-1.8/20-D48 M 0.404 [10.26] ULE-12/4.2-D24 M 0.400 [10.16] ULE-2.5/20-D24 M 0.404 [10.26] ULE-48/1.25-D48 M 0.446 [11.33] ULE-3.3/20-D12 M 0.404 [10.26] ULE-3.3/20-D24 M 0.404 [10.26] ULE-3.3/20-D48 M 0.404 [10.26] DIMENSIONS ARE IN INCHES [mm] TOLERANCES: 2 PLACE 0.02 ANGLES: 1 3 PLACE 0.010 COMPONENTS SHOWN ARE FOR REFERENCE ONLY www.murata-ps.com/support MDC_ULE Series.H03 Page 20 of 28 ULE Series Isolated, High Density, Eighth-Brick 1.25–20 Amp, DC-DC Converters Input Source Impedance TECHNICAL NOTES ULE converters must be driven from a low ac-impedance input source. The Input Fusing DC-DC’s performance and stability can be compromised by the use of highly Certain applications and/or safety agencies may require the installation of inductive source impedances. The input circuit shown in Figure 2 is a practical fuses at the inputs of power conversion components. Fuses should also be solution that can be used to minimize the effects of inductance in the input used if the possibility of sustained, non-current-limited, input-voltage polarity traces. For optimum performance, components should be mounted close to reversals exist. For Murata Power Solutions ULE 24-60 Watt DC-DC Converters, the DC-DC converter. If the application has a high source impedance, low VIN you should use fast-blow type fuses, installed in the ungrounded input supply models can benefi t of increased external input capacitance. line, with values no greater than the following. I/O Filtering, Input Ripple Current, and Output Noise Model Fuse Values All models in the ULE 24-60 Watt DC-DC Converters are tested/specifi ed for 12 Volt Input 10 Amps input refl ected ripple current and output noise using the specifi ed external input/ 24 Volt input 5 Amps output components/circuits and layout as shown in the following two fi gures. 48 Volt Input 4 Amps External input capacitors (CIN in Figure 2) serve primarily as energy-storage All relevant national and international safety standards and regulations must elements, minimizing line voltage variations caused by transient IR drops in be observed by the installer. For system safety agency approvals, the convert- conductors from backplane to the DC-DC. Input caps should be selected for bulk ers must be installed in compliance with the requirements of the end-use capacitance (at appropriate frequencies), low ESR, and high rms-ripple-current safety standard. ratings. The switching nature of DC-DC converters requires that dc voltage Input Undervoltage Shutdown and Start-Up Threshold sources have low ac impedance as highly inductive source impedance can affect Under normal start-up conditions, devices will not begin to regulate until system stability. In Figure 2, CBUS and LBUS simulate a typical dc voltage bus. Your specifi c system confi guration may necessitate additional considerations. the ramping-up input voltage exceeds the Start-Up Threshold Voltage. Once operating, devices will not turn off until the input voltage drops below the Undervoltage Shutdown limit. Subsequent re-start will not occur until the input is brought back up to the Start-Up Threshold. This built in hysteresis prevents any unstable on/off situations from occurring at a single input voltage. TO CURRENT OSCILLOSCOPE PROBE Start-Up Time +VIN The VIN to VOUT Start-Up Time is the interval of time between the point at which LBUS + the ramping input voltage crosses the Start-Up Threshold and the fully loaded VIN CBUS CIN output voltage enters and remains within its specifi ed accuracy band. Actual – measured times will vary with input source impedance, external input/output capacitance, and load. The ULE Series implements a soft start circuit that limits –VIN the duty cycle of its PWM controller at power up, thereby limiting the input CIN = 33μF, ESR < 700mΩ @ 100kHz inrush current. CBUS = 220μF, ESR < 100mΩ @ 100kHz LBUS = 12μH The On/Off Control to VOUT start-up time assumes the converter has its nominal input voltage applied but is turned off via the On/Off Control pin. The Figure 2. Measuring Input Ripple Current specifi cation defi nes the interval between the point at which the converter is turned on and the fully loaded output voltage enters and remains within its specifi ed accuracy band. Similar to the VIN to VOUT start-up, the On/Off Control to VOUT start-up time is also governed by the internal soft start circuitry and external load capacitance. The difference in start up time from VIN to VOUT and from On/Off Control to VOUT is therefore insignifi cant. www.murata-ps.com/support MDC_ULE Series.H03 Page 21 of 28 ULE Series Isolated, High Density, Eighth-Brick 1.25–20 Amp, DC-DC Converters In critical applications, output ripple/noise (also referred to as periodic and rise above the designed operating temperature, a precision temperature sensor random deviations or PARD) may be reduced below specifi ed limits using fi lter- will power down the unit. When the internal temperature decreases below the ing techniques, the simplest of which is the installation of additional external threshold of the temperature sensor, the unit will self start. See Performance/ output capacitors. These output caps function as true fi lter elements and Functional Specifi cations. should be selected for bulk capacitance, low ESR and appropriate frequency Output Overvoltage Protection response. All external capacitors should have appropriate voltage ratings and ULE output voltages are monitored for an overvoltage condition via magnetic be located as close to the converter as possible. Temperature variations for all feedback. The signal is coupled to the primary side and if the output voltage relevant parameters should also be taken carefully into consideration. The most rises to a level which could be damaging to the load, the sensing circuitry will effective combination of external I/O capacitors will be a function of line volt- power down the PWM controller causing the output voltages to decrease. Fol- age and source impedance, as well as particular load and layout conditions. lowing a time-out period the PWM will restart, causing the output voltages to In Figure 3, the two copper strips simulate real-world pcb impedances ramp to their appropriate values. If the fault condition persists, and the output between the power supply and its load. In order to minimize measurement voltages again climb to excessive levels, the overvoltage circuitry will initiate errors, scope measurements should be made using BNC connectors, or the another shutdown cycle. This on/off cycling is referred to as "hiccup" mode. probe ground should be less than ½ inch and soldered directly to the fi xture. Contact Murata Power Solutions for an optional output overvoltage monitor circuit using a comparator which is optically coupled to the primary side thus allowing tighter and more precise control. Current Limiting As soon as the output current increases to 10% to 50% above its rated value, the DC-DC converter will go into a current-limiting mode. In this condition, the output voltage will decrease proportionately with increases in output current, +SENSE thereby maintaining somewhat constant power dissipation. This is commonly +VOUT referred to as power limiting. Current limit inception is defi ned as the point at which the full-power output voltage falls below the specifi ed tolerance. See RLOAD C1 SCOPE C2 Performance/Functional Specifi cations. If the load current, being drawn from the converter, is signifi cant enough, the unit will go into a short circuit condition –VOUT as specifi ed under "Performance." –SENSE Short Circuit Condition When a converter is in current-limit mode, the output voltage will drop as C1 = 0.47μF CERAMIC C2 = NA the output current demand increases. If the output voltage drops too low, the LOAD 2-3 INCHES (51-76mm) FROM MODULE magnetically coupled voltage used to develop primary side voltages will also drop, thereby shutting down the PWM controller. Following a time-out period, Figure 3. Measuring Output Ripple/Noise (PARD) the PWM will restart causing the output voltages to begin ramping to their appropriate values. If the short-circuit condition persists, another shutdown Floating Outputs cycle will be initiated. This on/off cycling is referred to as "hiccup" mode. The Since these are isolated DC-DC converters, their outputs are "fl oating" with hiccup cycling reduces the average output current, thereby preventing internal respect to their input. Designers will normally use the –Output (pin 4) as the temperatures from rising to excessive levels. The ULE is capable of enduring an ground/return of the load circuit. You can, however, use the +Output (pin 8) as indefi nite short circuit output condition. ground/return to effectively reverse the output polarity. Features and Options Minimum Output Loading Requirements On/Off Control ULE converters employ a synchronous-rectifi er design topology. The ULE- The input-side, remote On/Off Control function can be ordered to operate with 12/4.2 and ULE-24/3 modules require minimum load; all other models regulate either polarity: within spec and are stable under no-load to full load conditions. Operation under no-load conditions however might slightly increase the output ripple and Standard models are equipped with Positive-polarity (“P" part-number noise. suffi x) and these devices are enabled when the On/Off Control is left open or is pulled high, as per Figure 4. Positive-polarity devices are disabled when the Thermal Shutdown On/Off Control is pulled low. These ULE converters are equipped with thermal-shutdown circuitry. If envi- ronmental conditions cause the internal temperature of the DC-DC converter to www.murata-ps.com/support MDC_ULE Series.H03 Page 22 of 28 ULE Series Isolated, High Density, Eighth-Brick 1.25–20 Amp, DC-DC Converters +VOUT + Vcc +VIN ON/OFF CONTROL +SENSE CONTROL 1MΩ ON/OFF 5-20 TRIM LOAD CONTROL TURNS –SENSE -VIN –VIN –VOUT Figure 6. Trim Connections Using A Trimpot Figure 4. Driving the Positive Polarity On/Off Control Pin Optional Negative-polarity devices (“N” suffi x) are off when the On/Off Control +VOUT +VIN is open (or pulled high), and on when the On/Off Control is pulled low with respect to –VIN as shown in Figure 5. +SENSE ON/OFF TRIM LOAD CONTROL + VIN R1 +VCC –SENSE –VIN –VOUT O N /O F F C O N TR O L Figure 7. Trim Connections To Increase Output Voltages Using a Fixed Resistor –VIN +VOUT +VIN Figure 5. Driving the Negative Polarity On/Off Control Pin +SENSE Dynamic control of the remote on/off function is facilitated with a mechanical relay or an open-collector/open-drain drive circuit (optically isolated if appropri- ON/OFF TRIM LOAD CONTROL ate). The drive circuit should be able to sink appropriate current (see Performance R2 Specs) when activated and withstand appropriate voltage when deactivated. –SENSE Applying an external voltage to the On/Off Control when no input power is applied to the converter can cause permanent damage to the converter. –VIN –VOUT Trimming Output Voltage ULE converters have a trim capability that allows users to adjust the output voltages as listed in the specifi cations. Adjustments to the output voltages can Figure 8. Trim Connections To Decrease Output Voltages be accomplished via a trim pot (Figure 6) or a single fi xed resistor as shown A single resistor connected from the Trim to the +Output, or +Sense where in Figures 7 and 8. A single fi xed resistor can increase or decrease the output applicable, will increase the output voltage in this confi guration. A resistor con- voltage depending on its connection. The resistor should be located close to nected from the Trim to the –Output, or –Sense where applicable, will decrease the converter and have a TCR less than 100ppm/°C to minimize sensitivity the output voltage in this confi guration. to changes in temperature. If the trim function is not used, leave the trim pin fl oating. Trim adjustments greater than the specifi ed range can have an adverse affect on the converter's performance and are not recommended. Excessive voltage differences between VOUT and Sense, in conjunction with trim adjust- ment of the output voltage, can cause the overvoltage protection circuitry to activate (see Performance Specifi cations for overvoltage limits). Power derating is based on maximum output current and voltage at the converter’s output pins. Use of trim and sense functions can cause output voltages to increase, thereby increasing output power beyond the converter's specifi ed rating or cause output voltages to climb into the output overvoltage region. Therefore: (VOUT at pins) x (IOUT) <= rated output power www.murata-ps.com/support MDC_ULE Series.H03 Page 23 of 28 ULE Series Isolated, High Density, Eighth-Brick 1.25–20 Amp, DC-DC Converters Remote Sense Note: The Sense and VOUT lines are internally connected Trim Equations through low value resistors. Nevertheless, if the sense function is not used for Trim Up Trim Down remote regulation the user should connect the +Sense to +VOUT and –Sense 1.5 Volt Output to –VOUT at the DC-DC converter pins. 6.23(VO – 1.226) 7.64 ULE series converters have a sense feature to provide point of use regula- –10.2 –10.2 RT (kΩ) = RT (kΩ) = UP DOWN VO – 1.5 1.5 – VO tion, thereby overcoming moderate IR drops in pcb conductors or cabling. The remote sense lines carry very little current and therefore require minimal 1.8 Volt Output cross-sectional-area conductors. The sense lines are used by the feedback control-loop to regulate the output. As such, they are not low impedance points 7.44(VO – 1.226) 9.12 –10.2 –10.2 RT (kΩ) = RT (kΩ) = UP DOWN and must be treated with care in layouts and cabling. Sense lines on a pcb 1.8 – VO VO – 1.8 should be run adjacent to dc signals, preferably ground. In cables and discrete 2.5 Volt Output wiring applications, twisted pair or other techniques should be implemented. 10(VO – 1.226) 12.26 ULE series converters will compensate for drops between the output voltage RT (kΩ) = –10.2 RT (kΩ) = –10.2 UP DOWN at the DC-DC and the sense voltage at the DC-DC provided that: VO – 2.5 2.5 – VO [VOUT(+) –VOUT(–)] –[Sense(+) –Sense (–)]  5% VOUT 3.3 Volt Output Output overvoltage protection is monitored at the output voltage pin, not 16.31 13.3(VO – 1.226) –10.2 –10.2 RT (k ) = RT (k ) = DOWN the Sense pin. Therefore, excessive voltage differences between VOUT and UP VO – 3.3 3.3 – VO Sense in conjunction with trim adjustment of the output voltage can cause the overvoltage protection circuitry to activate (see Performance Specifi cations 5 Volt Output for overvoltage limits). Power derating is based on maximum output current 25.01 20.4(VO – 1.226) and voltage at the converter’s output pins. Use of trim and sense functions can –10.2 –10.2 RT (k ) = RT (k ) = DOWN UP VO – 5 5 – VO cause output voltages to increase thereby increasing output power beyond the ULE’s specifi ed rating or cause output voltages to climb into the output over- 12 Volt Output voltage region. Also, the use of Trim Up and Sense combined may not exceed 49.6(VO – 1.226) 60.45 +10% of VOUT. Therefore, the designer must ensure: –10.2 –10.2 RT (k ) = RT (k ) = UP DOWN VO – 12 12 – VO (VOUT at pins) x (IOUT)  rated output power 15 Volt Output Contact and PCB resistance losses due to IR drops 76.56 62.9(VO – 1.226) –10.2 –10.2 RT (k ) = RT (k ) = DOWN UP +VOUT 15 – VO VO – 15 +VIN IOUT +SENSE Note: Resistor values are in k. Adjustment accuracy is subject to resistor Sense Current tolerances and factory-adjusted output accuracy. VO = desired output voltage. ON/OFF TRIM LOAD CONTROL Sense Return Soldering Guidelines –SENSE Murata Power Solutions recommends the specifi cations below when installing these IOUT Return converters. These specifi cations vary depending on the solder type. Exceeding these –VIN –VOUT specifi cations may cause damage to the product. Be cautious when there is high atmo- spheric humidity. We strongly recommend a mild pre-bake (100 ºC. for 30 minutes). Your Contact and PCB resistance losses due to IR drops production environment may differ therefore please thoroughly review these guidelines with your process engineers. Figure 9. Remote Sense Circuit Confi guration Wave Solder Operations for through-hole mounted products (THMT) For Sn/Ag/Cu based solders: For Sn/Pb based solders: Maximum Preheat Temperature 115° C. Maximum Preheat Temperature 105° C. Maximum Pot Temperature 270° C. Maximum Pot Temperature 250° C. Maximum Solder Dwell Time 7 seconds Maximum Solder Dwell Time 6 seconds Refl ow Solder Operations for surface-mount products (SMT) For Sn/Ag/Cu based solders: For Sn/Pb based solders: Preheat Temperature Less than 1 ºC. per second Preheat Temperature Less than 1 ºC. per second Time over Liquidus 45 to 75 seconds Time over Liquidus 60 to 75 seconds Maximum Peak Temperature 260 ºC. Maximum Peak Temperature 235 ºC. Cooling Rate Less than 3 ºC. per second Cooling Rate Less than 3 ºC. per second www.murata-ps.com/support MDC_ULE Series.H03 Page 24 of 28 ULE Series Isolated, High Density, Eighth-Brick 1.25–20 Amp, DC-DC Converters Surface-Mount Package ("M" suffi x) Mechanical Confi guration of Input/Output Connections Murata Power Solutions’ ULE series SMT DC-DC converters are the only higher- These new converters are supplied either using traditional through-hole pins power DC-DCs that can be automatically “pick-and-placed” using standard or SMT leads. (Note that some models are offered only with lead mounting). vacuum-pickup equipment and subsequently refl owed using high-temperature, The pin options insert into plated-through holes in the host pcb. Be aware that lead-free solder. some heat dissipation is carried off by either the pins or leads. The Derating Curves assume that some additional pad area is available on your host pcb to Virtually all SMT DC-DCs today are unprotected "open-frame" devices as- absorb the heat. sembled by their vendors with high-temperature solder (usually Sn96.5/Ag3.5 with a melting point +221°C) so that you may attach them to your board using The lead option uses either short tabs in "gullwing" style or standoff leads low-temperature solder (usually Sn63/Pb37 with a melting point of +183°C). under the converter. The gullwing leads typically are copper alloy with 150 Conceptually straightforward, this "stepped" solder approach has its limita- microinches of tin plating. Solder paste (typically 0.008" to 0.009" thick) is ap- tions . . . and is clearly out of step with an industry trending toward the broad plied to the host pcb using a solder mask pressure screening technique and the use of lead-free solders. Users need to experiment and develop refl ow profi les board is heated and cooled long enough for the solder to refl ow and adhere to that ensure the components on their DC-DC never exceed 215-216°C. If those both the host pads and the converter’s mounting leads. components get too hot, "double-refl ow" could compromise the reliability of After such mounting, the entire mechanical mounting load is carried by the their solder joints. Virtually all these devices demand you "cool down" the Sn63 solder. Obviously the converters must be accurately positioned all during the profi le you are likely using today. solder refl ow period. Where solder surface tension is suffi cient to force tiny Murata Power Solutions is not exempted from the Laws of Physics. And we components into position, these larger converters may not move and must be do not have magic solders no one else has. We do have a simple and practical, accurately positioned by your SMT system. straightforward approach that works. We assemble our SMT DC-DCs on a Part Handling and Supply thermally-stable plastic lead-frame (nylon 46, UL94V-0 fl ammability rated) using SMT eighth- and quarter-brick DC-DC converters (plus installed heat shields if a high temperature lead-free solder. The lead-frame ensures coplanarity (to used) are supplied in JEDEC-standard 5.35" by 12.4" waffl e trays which are within 0.004 in.) of the unit's tin-plated (150 microinches) copper leads and compatible with the feeders on industry-standard pick-and-place machines. also supports a removable heat shield. Since the converters are larger and heavier than many other components, The disposable heat shield, with a cutaway exposing the package leads, make sure your system can reliably remove the units from their trays, move provides thermal insulation to internal components during refl ow and doubles as them to the host pcb and accurately position them. The plastic heat shield the vacuum pick-up location. The insulation properties of the heat shield are so (Figure 10) doubles as a vacuum pickup area. effective that temperature differentials as high as 50°C develop inside-to-outside the shield. Oven temperature profi les with peaks of 250-260°C and dwell times exceeding 2 minutes above 221°C are easily achieved. Murata Power Solutions’ new-generation SMT units are shipped in stackable, JEDEC-style plastic trays (Figure 13). Automated Assembly Production Notes Murata Power Solutions’ new high-effi ciency DC-DC converters are designed for modern surface-mount technology (SMT) automated assembly using screened solder paste, "pick and place" component positioning and forced hot air refl ow oven soldering. If you are new to SMT techniques and have a volume application, these features save time, cost and improve manufacturing effi ciency. Murata Power Solutions’ DC-DC assembly operations themselves make extensive use of such techniques. Even if you have previous SMT experience, you should read the sections be- low on solder refl ow profi les and heat shields. This information is not intended to replace the documentation for your SMT system. We assume that you are Figure 10. ULE SMT DC-DC with Disposable Heat Shield already experienced with all the components of your SMT system. Solder Balls This section will discuss several SMT issues, including: ULE converters are thoroughly inspected according to military standard I/O Mechanical Confi guration J-STD-001B for the presence of solder balls. The specifi cation allows small Part Handling and Supply solder balls as long as they are rigidly attached and do not compromise the spacing and clearance requirements needed to maintain electrical isolation. Printed Circuit Board (pcb) Mounting Soldering using Refl ow Technology Temperature Profi ling Heat Shields and Removal www.murata-ps.com/support MDC_ULE Series.H03 Page 25 of 28 ULE Series Isolated, High Density, Eighth-Brick 1.25–20 Amp, DC-DC Converters Orientation: When loaded into JEDEC trays, the converters 250 are oriented in the same direction. See the diagram below. For the ULE series, a notch is placed on the top of the case (on the 200 Heat Shield removal tabs) to indicate the pin 1 position. You should visually Test Board Air Under Shield inspect the tray to be sure of this orientation. 150 Most pick-and-place automatic assembly systems use a 100 camera which must be trained to recognize the orientation of the converter before it is assembled onto the host PC board. 50 This “training” locates and identifi es prominent, dimensionally Z1 Z2 Z3 Z4 Z5 Z6 Z7 100 200 300 400 500 600 stable landmarks such as the board corners or fi ducial marks. Seconds On the bottom of the converter, the ULE series include Figure 11. Recommended Solder Profi le (When the Heat-shield temperature exceeds +250°C, optical fi ducial marks viewable by your SMT imaging system. Observing from the air within is 50°C cooler) the bottom, your SMT imaging camera should fi nd these marks to identify the converter and verify pin 1. On most pick-and-place systems, during head transit, Post Refl ow Procedures the imaging system will automatically fi ne tune the end mounting position of After successful solder refl ow, be sure to completely clean and dry your assem- the converter using image comparisons from these fi ducials or other reference bled boards using a recommended wash solution and dryer. Failure to remove all marks you have chosen. fl ux may cause long term deterioration of on-board conductors and components. The fi ducial marks are placed fairly close together because many imaging And, traces of contaminants which are not removed may reduce isolation volt- systems have a one inch or less observing area since most SMT parts are con- ages or risk a safety hazard. Be aware that low remaining concentrations of fl ux siderably smaller than these converters. You may prefer to train your imaging or other assembly compounds can be very diffi cult to detect by eye. system to use a corner of the converter or an I/O lead. Pick and Place pcb Mounting The fi ducial marks will remain identical within any date code lot of converters. The main issues here are pad area, orientation, positioning accuracy, vacuum In the remote possibility that the fi ducials may have changed position with a PC pickup and coplanarity. Murata Power Solutions recommends that pcb pads to board revision, you should not mix different date lots on any one production as- interface with the DC-DC converter should be sized as shown in the diagram sembly session. In addition, to avoid non-recognition or misplacement of the con- below. The pads footprint accommodates the positioning accuracy of your SMT verter, retrain your imaging system at the beginning of each series of assembly equipment and manufactured tolerances of the DC-DC mounting leads. sessions. There may be tiny variations in the absolute position from unit to unit. If you use a camera above the pcb after placement on the solder paste, do not rely on the inkjet marking on the heat shield to verify proper orientation. SMT LEAD SMT UNIT Use the pin 1 notch instead. Coplanarity: Murata Power Solutions manufactures these converters with very fl at mounting leads (see coplanarity specs) however your host pcb must 0.020 (0.51) also be fl at for a successful mounting. Be aware of possible warping of the pcb PCB under heat gradients and/or humidity conditions. The solder paste will tolerate a small amount of mismatch and will tend to “wet” the entire pad area by Copper Pad capillary action if the temperatures are correct. 2.340 (59.44) Vacuum Pickup: Select the vacuum collet on your SMT placement system 0.183 for the weight and size of the DC-DC converter. Note that units with heatsinks 1.975 (50.17) (4.65) are slightly heavier. Tests at Murata Power Solutions have shown that excellent acceleration and transit head speed are available for these converters if the collet size is proper and the vacuum is suffi cient. When positioning the vacuum collet, use the geometric center of the heat shield as the pickup area since the center of gravity is very close. 0.300 TYP. Soldering (7.62) 0.020 REF. 0.150 TYP. Refl ow technology works well for small parts. However, larger components (0.51) (3.81) such as these DC-DC’s with higher thermal mass may require additional refl ow 0.130 TYP. time (but not enough to disturb smaller parts also being refl owed concurrently (3.30) with the DC-DC). When this is combined with higher temperature lead-free sol- DIMENSIONS ARE IN INCHES (MM) ders (or solders with reduced heavy metals), there is increased risk of reheat- ing components inside the DC-DC enough so that they either change positions Figure 12. Recommended SMT Mounting Pad Dimensions (and possibly stop functioning) or the components are damaged by the heat. www.murata-ps.com/support MDC_ULE Series.H03 Page 26 of 28 Degrees Celsius ULE Series Isolated, High Density, Eighth-Brick 1.25–20 Amp, DC-DC Converters For these reasons, Murata Power Solutions developed disposable heat 5.35 (135.89) shields using high temperature plastic. The DC-DC is installed and refl owed 1.50 1.50 with the shield in place. After successful refl ow and cooling, and before wash- (38.1) (38.1) ing, the heat shield should be removed. Temperature Profi ling We wish to ramp the temperature up and down to successfully refl ow the solder without heat damage. Each refl ow oven, humidity conditions, solder paste type, oven feed rate, and the number of heat zones all require a different profi le. Therefore you may have to experiment. PIN 1 DIMPLE Since these converters are constructed using high temperature solders, 2.875 there will be no heat problems on your host pcb using traditional solder with (73.03) 63% lead and 37% tin with a melting point of +183°C. Device lead tempera- ture must remain below 230°C for less than 75 seconds, assuming that the heat shield is in place. Murata Power Solutions uses a 216°C melt lead-free tin/silver/copper alloy to assemble these converters. There are several lead-free solders suitable for your host pcb depending on 12.40 2.875 (314.96) (73.03) your SMT system and whatever local certifi cation and environmental regulations you must observe. Contact Murata Power Solutions if you need specifi c advice. Heat Shield Careful thermocouple testing has shown that the interior of the DC-DC under the heat shield is tens of degrees cooler than the outside ambient temperature 2.875 for typical refl ow profi les. This protects internal components and limits the (73.03) amount of refl ow where it is not desired. The heat shield also includes marking for product identifi cation and a date/lot code. On ULE models, the heat shield is attached to the converter using molded plastic pins on the heat shield interior which insert into recessed dimples in the pinframe. An extra molded pin on the heat shield at the pin 1 location (and corresponding notch on the pcb) can only be installed one way properly on the pinframe. If the shield accidentally comes loose, it may be reinstalled by align- ing the pins and dimples. To remove the shield from the converter, after successful mounting and cool- 1.032 ing, squeeze the heat shield ears inward toward the converter body and pull the (26.21) shield upwards. Discard or recycle the shield. If you are using a fl ux wash cycle, remove the heat shield before washing to avoid coming loose inside the washer. DIMENSIONS ARE IN INCHES (MM) Figure 13. Shipping Tray www.murata-ps.com/support MDC_ULE Series.H03 Page 27 of 28 ULE Series Isolated, High Density, Eighth-Brick 1.25–20 Amp, DC-DC Converters Vertical Wind Tunnel Murata Power Solutions employs a computer controlled custom-designed closed loop vertical wind tunnel, infrared video camera system, and test instrumentation for accurate airfl ow and heat dissipation analysis of power products. IR Transparent The system includes a precision low fl ow-rate anemometer, optical window Variable variable speed fan, power supply input and load controls, Unit under speed fan temperature gauges, and adjustable heating element. test (UUT) The IR camera monitors the thermal performance of the IR Video Unit Under Test (UUT) under static steady-state conditions. A Camera special optical port is used which is transparent to infrared wavelengths. Both through-hole and surface mount converters are soldered down to a 10" x 10" host carrier board for realistic heat absorption and spreading. Both longitudinal and trans- Heating verse airfl ow studies are possible by rotation of this carrier element board since there are often signifi cant differences in the heat Precision dissipation in the two airfl ow directions. The combination of low-rate adjustable airfl ow, adjustable ambient heat, and adjustable anemometer Input/Output currents and voltages mean that a very wide 3” below UUT range of measurement conditions can be studied. The collimator reduces the amount of turbulence adjacent Ambient to the UUT by minimizing airfl ow turbulence. Such turbu- temperature lence infl uences the effective heat transfer characteristics sensor and gives false readings. Excess turbulence removes more heat from some surfaces and less heat from others, possibly Airflow causing uneven overheating. collimator Both sides of the UUT are studied since there are different thermal gradients on each side. The adjustable heating element and fan, built-in temperature gauges, and no-contact IR camera mean Figure 14. Vertical Wind Tunnel that power supplies are tested in real-world conditions. This product is subject to the following operating requirements Murata Power Solutions, Inc. and the Life and Safety Critical Application Sales Policy: 129 Flanders Road, Westborough, MA 01581 U.S.A. Refer to: http://www.murata-ps.com/requirements/ ISO 9001 and 14001 REGISTERED Murata Power Solutions, Inc. makes no representation that the use of its products in the circuits described herein, or the use of other technical information contained herein, will not infringe upon existing or future patent rights. The descriptions contained herein do not imply the granting of licenses to make, use, or sell equipment constructed in accordance therewith. Specifi cations are subject to change without notice. © 2018 Murata Power Solutions, Inc. www.murata-ps.com/support MDC_ULE Series.H03 Page 28 of 28