MURATA POWER SOLUTIONS UCE-12/10-D48N-C

UCE Series www.murata-ps.com Isolated, High-Density, Eighth-Brick Low Profile DC-DC Converters FEATURES „„ Industry standard eighth-brick pinout Typical unit and package „„ Low profile 0.4" height with 0.9" x 2.3" For efficient, fully isolated DC power in the smallest space, the UCE outline dimensions „„ open frame DC-DC converter series fit in industry-standard “eighth 36 to 75 Vdc input range (48V nominal) „„ Fully isolated, 2250 Vdc (BASIC) brick” outline dimensions and mounting pins (on quarter-brick pinout). insulation PRODUCT OVERVIEW „„ Outstanding thermal performance and derating Units are offered with fixed output voltages from down the converter if thermal limits are reached. 1.5 to 12 Volts and currents up to 30 Amps. UCEs “Hiccup” output protection automatically restarts „„ Extensive self-protection and short operate over a wide temperature range (up to +85 the converter when the fault is removed. circuit features with no output reverse degrees Celsius at moderate airflow) with full rated A convenient remote On/Off control input enables conduction power. Interleaved synchronous rectifier topology phased startup and shutdown in multi-voltage ap- „„ On/Off control, trim and sense functions yields excellent efficiency over 90% and no reverse plications. To compensate for longer wiring and to „„ Interleaved synchronous rectification output conduction. retain output voltage accuracy at the load, UCEs em- yields high efficiency over 90% UCEs achieve these impressive mechanical and ploy a Sense input to dynamically correct for ohmic environmental specs while delivering excellent losses. A trim input may be connected to a user’s „„ Fully protected against temperature and electrical performance in a through-hole package. adjustment potentiometer or trim resistors for output voltage limits Overall noise is typically 50 mV pk-pk (low voltage voltage calibration. The UCE will tolerate substantial „„ RoHS-6 or RoHS-5 compliant models) with fast step response. These converters capacitive loading for bypass-cap applications. „„ Certified to UL/EN/IEC 60950-1 and offer tight output regulation and high stability even UCEs include industry-standard safety certifica- CAN/CSA C22.2 No. 60950-1, 2nd Edition with no load. The unit is fully protected against tions and BASIC I/O insulation provides input/output safety approvals input undervoltage, output overcurrent and short isolation to 2250V. Radiation emission testing is circuit. An on-board temperature sensor shuts performed to widely-accepted EMC standards. SIMPLIFIED BLOCK DIAGRAM +SENSE (7) +VIN (1) +VOUT (8) SWITCH CONTROL −VOUT (4) –VIN −SENSE (3) INPUT UNDERVOLTAGE, INPUT (5) PULSE OVERVOLTAGE, AND OUTPUT TRANSFORMER OVERVOLTAGE COMPARATORS PWM OPTO REFERENCE & VOUT TRIM CONTROLLER ISOLATION ERROR AMP (6) REMOTE ON/OFF Typical topology is shown. CONTROL (2) Figure 1. Simplified Block Diagram For full details go to www.murata-ps.com/rohs www.murata-ps.com/support MDC_UCE.E03 Page 1 of 17 UCE Series Isolated, High-Density, Eighth-Brick Low Profile DC-DC Converters PERFORMANCE SPECIFICATIONS SUMMARY AND ORDERING GUIDE Output Input Ripple & Noise IIN, no IIN, full (mVp-p) Regulation (max.) Efficiency Package VOUT IOUT Power VIN Nom. Range load load Model Family (V) (A) (W) Typ. Max. Line Load (V) (V) (mA) (A) Min. Typ. Case Pinout 1.2 25 30 Please contact Murata Power Solutions for further information. UCE-1.2/25-D48 UCE-1.5/20-D48 1.5 20 30 50 100 ±0.15% ±0.3% 48 36-75 50 0.72 85% 87% C56 P32 UCE-1.5/40-D48 1.5 40 60 Please contact Murata Power Solutions for further information. 1.8 30 54 30 45 1.28 87% 88% UCE-1.8/30-D48 80 UCE-2.5/20-D48 2.5 20 50 ±0.125% ±0.25% 50 1.14 88% 91% UCE-3.3/15-D48 3.3 15 49.5 1.15 86% 90% 50 60 3.3 30 99 100 ±0.1% ±0.2% 2.27 89% 91% UCE-3.3/30-D48 UCE-5/10-D48 5 10 50 48 36-75 30 1.15 88% 90.5% C56 P32 UCE-5/20-D48 5 20 100 30 60 2.25 90% 92.5% 12 4.2 50.4 150 ±0.125% ±0.25% 1.14 92% UCE-12/4.2-D48 50 UCE-12/8.3-D48 12 8.3 99.6 300 2.31 86% 200 90% UCE-12/10-D48 12 10 120 2.78  Please refer to the model number structure for additional ordering part numbers and options. PART NUMBER STRUCTURE U CE - 3.3 / 30 - D48 N B H Lx - C Output Configuration: RoHS Hazardous Materials compliance C = RoHS6 (does not claim EU RoHS exemption 7b–lead in solder), standard U = Unipolar/Single Y = RoHS5 (with lead), optional, special quantity order Pin Length Option (Through-hole packages only) Eighth-Brick Package Blank = Standard pin length 0.180 inches (4.6mm) L1 = Pin length 0.110 inches (2.79mm)* L2 = Pin length 0.145 inches (3.68mm)* Nominal Output Voltage *Special quantity order is required; Conformal coating (optional) no sample quantities available. Blank = no coating, standard Maximum Rated Output H = Coating added, optional, special quantity order Current in Amps Baseplate (optional, not available on some models) Blank = No baseplate, standard Input Voltage Range: B = Baseplate installed, optional, special quantity order D48 = 36-75V, Note: Some model combinations may not be On/Off Control Logic 48V nominal available. Contact Murata Power Solutions for N = Negative logic, standard availability. P = Positive logic, optional As of September 2017, ONLY the following part numbers will be available: UCE-5/20-D48N-C; UCE-5/20-D48NB-C. Product Adaptations Murata Power Solutions offers several variations of our core product family. As of this date, the following products are available: These products are available under scheduled quantity orders and may also UCE-3.3/30-D48NHL2-Y include separate manufacturing documentation from a mutually agreeable Product Specification. Since these product adaptations largely share a common UCE-12/4.2-D48NHL2-Y parts list and similar specifications and test methods with their root products, These models are all negative On/Off logic, no baseplate, conformal coating they are provided at excellent costs and delivery. Please contact Murata Power added, 3.68mm pin length, and RoHS-5 hazardous substance compliance (with Solutions for details. lead). www.murata-ps.com/support MDC_UCE.E03 Page 2 of 17 UCE Series Isolated, High-Density, Eighth-Brick Low Profile DC-DC Converters FUNCTIONAL SPECIFICATIONS INPUT CHARACTERISTICS Under- Reflected Remote On/Off Control Start-up voltage (back) Internal Reverse threshold Output Model Family Shut- Ripple Input Filter Polarity Inrush Low Line Standby Positive Logic Negative Logic Min. Short Current down Current Type Protection Transient (Vin=min.) Mode “P” Model “N” Model (A) Circuit (mA) 2 (V) (mA)② A sec (A) (mA) Suffix Suffix (mA) 32 0.97 UCE-1.5/20-D48 UCE-1.8/30-D48 32.5 1.72 UCE-2.5/20-D48 34 32 1.53 L-C OFF=Ground OFF=open or 32 1.54 UCE-3.3/15-D48 50-150, 10-30, 1-10, pin to +1V max. +2.5V to UCE-3.3/30-D48 32 model 3.06 0.05 None, install model model 1.0 ON=open or +15V max. 2 dependent A sec external fuse UCE-5/10-D48 34.5 32 1.53 Pi dependent dependent +3.5 to +15V ON=Ground pin to 34 31.5 3.00 Pi UCE-5/20-D48 max. +0.8V max. UCE-12/4.2-D48 1.52 UCE-12/8.3-D48 34 32 3.07 L-C 500 3.70 UCE-12/10-D48 OUTPUT CHARACTERISTICS Current Limit Vout Capacitive Remote Ripple/ Inception Accuracy Loading Max. Low Sense Noise 98% of Vout, 50% Load ESR <0.02Ω Max. Adjustment Temperature Minimum Compen- (20 MHz Line/Load after warmup Model Family % of Vnom µF Range Coefficient Loading sation bandwidth) Regulation Efficiency A UCE-1.5/20-D48 24.5 UCE-1.8/30-D48 36 UCE-2.5/20-D48 10,000 32 UCE-3.3/15-D48 24 –10 to ±0.02% of UCE-3.3/30-D48 35 No minimum ±1% +10% of Vout range +10% See ordering guide load UCE-5/10-D48 1000 15. Vnom. per °C UCE-5/20-D48 10,000 23 min. UCE-12/4.2-D48 5.5 UCE-12/8.3-D48 1000 12 UCE-12/10-D48 13 ISOLATION CHARACTERISTICS Input to Input to Output baseplate Baseplate to output Isolation Isolation Min. Min. Min. Resistance Capacitance Model Family V V V MΩ pF Isolation Safety Rating UCE-1.5/20-D48 100 UCE-1.8/30-D48 10 UCE-2.5/20-D48 UCE-3.3/15-D48 UCE-3.3/30-D48 2250 1500 1500 1000 Basic Insulation UCE-5/10-D48 100 UCE-5/20-D48 UCE-12/4.2-D48 UCE-12/8.3-D48 UCE-12/10-D48 www.murata-ps.com/support MDC_UCE.E03 Page 3 of 17 UCE Series Isolated, High-Density, Eighth-Brick Low Profile DC-DC Converters FUNCTIONAL SPECIFICATIONS, CONTINUED MISCELLANEOUS CHARACTERISTICS Overvoltage 12 Protection Operating Operating Storage Thermal Short (V) Via Temperature Range PCB Temperature Protection/ Circuit magnetic Short Circuit Relative Calculated with derating Temperature Range Shutdown Current feedback Protection Short Circuit Humidity 4 16 Model Family MTBF (°C) (no derating) (°C) (ºC) (A) (V) Method Duration (non-condensing) UCE-1.5/20-D48 1.95 TBC 2.8 V. max UCE-1.8/30-D48 Current Continuous, UCE-2.5/20-D48 1.8 M HRS 120 5 3 limiting, output UCE-3.3/15-D48 2.4 M HRS −40 to +110 4.25 hiccup shorted UCE-3.3/30-D48 −55 to −40 to +85 (model autorestart. to to +85°C/85% +125 UCE-5/10-D48 2.6 M HRS dependent) 110 0.5 7 max. Remove ground. UCE-5/20-D48 2.7 M HRS overload for No dam- TBC UCE-12/4.2-D48 recovery. age. UCE-12/8.3-D48 125 5 14.5 2.4 M HRS UCE-12/10-D48 ABSOLUTE MAXIMUM RATINGS DYNAMIC CHARACTERISTICS Start-up Time Dynamic Load Input Voltage: Response Continuous: Remote On/ (50-75-50% 48 Volt input models 75 Volts Vin to Vout Off to Vout load step) to 1% Transient (100 mSec. Max.) regulated regulated of final value, Switching 48 Volt input models 100 Volts (Max.) (Max.) µSec Frequency On/Off Control +15 Volts Model Family (See note 1) mSec KHz Input Reverse Polarity Protection None, install external fuse. UCE-1.5/20-D48 100 50 50 480 Output Overvoltage Protection Magnetic feedback. 150 10 10 400 UCE-1.8/30-D48 See specifications. UCE-2.5/20-D48 100 50 50 350 Output Current Current-limited. Devices can UCE-3.3/15-D48 200 50 50 480 withstand sustained short circuit 50 15 10 380 UCE-3.3/30-D48 without damage. UCE-5/10-D48 100 50 50 400 Storage Temperature –40 to +125°C. UCE-5/20-D48 100 max. 10 10 330 Lead Temperature See soldering guidelines. UCE-12/4.2-D48 30 60 60 Absolute maximums are stress ratings. Exposure of devices to greater than any of these UCE-12/8.3-D48 50 50 50 200 conditions may adversely affect long-term reliability. Proper operation under conditions UCE-12/10-D48 50 60 60 other than those listed in the Performance/Functional Specifications Table is not implied or recommended. www.murata-ps.com/support MDC_UCE.E03 Page 4 of 17 UCE Series Isolated, High-Density, Eighth-Brick Low Profile DC-DC Converters FUNCTIONAL SPECIFICATIONS, CONTINUED PERFORMANCE SPECIFICATION NOTES (1) All models are tested and specified with external 1||10 µF ceramic/tantalum output capaci- (7) The outputs are not intended to sink appreciable reverse current. This may damage the tors and no external input capacitor. All capacitors are low ESR types. These capacitors are outputs. necessary to accommodate our test equipment and may not be required to achieve specified (8) Output noise may be further reduced by adding an external filter. See I/O Filtering and Noise performance in your applications. All models are stable and regulate within spec under no-load Reduction. conditions. (9) All models are fully operational and meet published specifications, including “cold start” at General conditions for Specifications are +25 deg.C, Vin = nominal, Vout = nominal, full load. –40ºC. Adequate airflow must be supplied for extended testing under power. (10) Regulation specifications describe the deviation as the line input voltage or output load (2) Input Ripple Current is tested and specified over a 5 Hz to 20 MHz bandwidth. Input filtering current is varied from a nominal midpoint value to either extreme. is Cin = 33 µF, 100V tantalum, Cbus = 220 µF, 100V electrolytic, Lbus = 12 µH. (11) Alternate pin length and/or other output voltages are available under special quantity order. (3) Note that Maximum Power Derating curves indicate an average current at nominal input (12) Output overvoltage is non-latching. When the overvoltage fault is removed, the converter voltage. At higher temperatures and/or lower airflow, the DC-DC converter will tolerate brief will immediately recover. full current outputs if the total RMS current over time does not exceed the Derating curve. All Derating curves are presented at sea level altitude. Be aware of reduced power dissipation (13) Do not exceed maximum power specifications when adjusting the output trim. with increasing density altitude. (14) At zero output current, the output may contain low frequency components which exceed (4) Mean Time Before Failure is calculated using the Telcordia (Belcore) SR-332 Method 1, Case the ripple specification. The output may be operated indefinitely with no load. 3, ground fixed conditions, Tpcboard=+25 deg.C, full output load, natural air convection. (15) If reverse polarity is accidentally applied to the input, a body diode will become forward bi- (5) The On/Off Control is normally controlled by a switch. But it may also be driven with exter- ased and will conduct considerable current. To ensure reverse input protection with full output nal logic or by applying appropriate external voltages which are referenced to Input Common. load, always connect an external input fuse in series with the +Vin input. The On/Off Control Input should use either an open collector or open drain transistor. (6) Short circuit shutdown begins when the output voltage degrades approximately 2% from the selected setting. PHYSICAL CHARACTERISTICS Outline dimensions See mechanical specs (below) Pin material Copper alloy Pin diameter 0.04/0.062" (1.016/1.524mm) Pin finish Nickel underplate with gold overplate UCE-1.5/20-D48 0.67 ounces (19 grams) UCE-1.8/30-D48, UCE-2.5/20-D48 UCE-5/10-D48 0.71 ounces (20 grams) Weight UCE-5/20-D48 UCE-12/4.2-D48 UCE-3.3/15-D48 1 ounce (28 grams) UCE-3.3/30-D48, UCE-12/8.3-D48, UCE-12/10-D48 0.81 ounces (23 grams) Meets EN55022/CISPR22 (requires external filter) Electromagnetic interference (external filter required) Safety Certified to UL/cUL 60950-1, CSA-C22.2 No. 60950-1, IEC/EN 60950-1, 2nd Edition SOLDERING GUIDELINES Murata Power Solutions recommends the specifications below when installing these converters. These specifications vary depending on the solder type. Exceed- ing these specifications may cause damage to the product. Your production environment may differ; therefore please thoroughly review these guidelines with your process engineers. Wave Solder Operations for through-hole mounted products (THMT) For Sn/Ag/Cu based solders: Maximum Preheat Temperature 115ºC. Maximum Pot Temperature 270ºC. Maximum Solder Dwell Time 7 seconds For Sn/Pb based solders: Maximum Preheat Temperature 105ºC. Maximum Pot Temperature 250ºC. Maximum Solder Dwell Time 6 seconds www.murata-ps.com/support MDC_UCE.E03 Page 5 of 17 UCE Series Isolated, High-Density, Eighth-Brick Low Profile DC-DC Converters TYPICAL PERFORMANCE DATA UCE-1.5/20-D48 Efficiency vs Line Voltage & Load Current @ 25ºC UCE-1.5/20-D48 Maximum Current Temperature Derating (Vin = 48V, no baseplate, longitudinal airflow at sea level) 90 20 85 16 0.5 m/s (100 LFM) 1.0 m/s (200 LFM) Vin = 75V 1.5 m/s (300 LFM) 12 80 2.0 m/s (400 LFM) Vin = 48V Vin = 36V 8 75 4 70 0 65 30 35 40 45 50 55 60 65 70 75 80 85 Ambient Temperature (ºC) 60 3 6 9 12 15 18 Load Current (A) UCE-1.8/30-D48 Efficiency vs Line Voltage & Load Current @ 25ºC UCE-1.8/30-D48 Maximum Current Temperature Derating (Vin = 48V, no baseplate, longitudinal airflow at sea level) 95 35 90 30 85 Vin = 75V 25 80 Vin = 48V 0.5 m/s (100 LFM) 75 20 1.0 m/s (200 LFM) Vin = 36V 70 15 1.5 m/s (300 LFM) 65 2.0 m/s (400 LFM) 10 60 55 5 50 0 45 30 35 40 45 50 55 60 65 70 75 80 40 Ambient Temperature (ºC) 3 5 7 9 11 13 15 17 19 21 23 25 27 29 Load Current (A) UCE-2.5/20-D48 Efficiency vs Line Voltage & Load Current @ 25ºC UCE-2.5/20-D48 Maximum Current Temperature Derating (Vin = 48V, with baseplate, longitudinal airflow at sea level) 95 20 18 90 Natural Convection 16 0.5 m/s (100 LFM) Vin = 75V 1.0 m/s (200 LFM) 85 Vin = 48V 14 1.5 m/s (300 LFM) Vin = 36V 12 80 10 30 40 50 60 70 80 75 Ambient Temperature (ºC) 70 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Load Current (A) www.murata-ps.com/support MDC_UCE.E03 Page 6 of 17 Efficiency (%) Efficiency (%) Output Current (A) Output Current (A) Output Current (A) Efficiency (%) UCE Series Isolated, High-Density, Eighth-Brick Low Profile DC-DC Converters TYPICAL PERFORMANCE DATA UCE-3.3/15-D48 Efficiency Vs. Line Voltage & Load Current @ +25ºC UCE-3.3/15-D48 Maximum Current Temperature Derating (Vin = 48V, no baseplate, longitudinal airflow at sea level) 95 15 12 90 0.5 m/s (100 LFM) 1.0 m/s (200 LFM) 9 Vin = 75V 85 1.5 m/s (300 LFM) Vin = 48V 2.0 m/s (400 LFM) 6 Vin = 36V 80 3 75 0 30 35 40 45 50 55 60 65 70 75 80 85 70 Ambient Temperature (ºC) 3 4 5 6 7 8 9 10 11 12 13 14 15 Load Current (A) UCE-3.3/30-D48 Efficiency vs Line Voltage & Load Current @ 25ºC 95 22 90 20 85 18 Vin = 75V 80 16 Vin = 48V 75 Vin = 36V 14 70 12 Power Dissipation 65 10 Vin = 48V 60 8 55 6 50 4 45 2 40 0 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Load Current (A) UCE-3.3/30-D48 Maximum Current Temperature Derating UCE-3.3/30-D48 Maximum Current Temperature Derating (Vin=48V, no baseplate, longitudinal airflow at sea level) (Vin=48V, no baseplate, transverse airflow at sea level) 35 35 30 30 25 25 20 20 Natural Convection Natural Convection 15 15 0.5 m/s (100 LFM) 0.5 m/s (100 LFM) 1.0 m/s (200 LFM) 1.0 m/s (200 LFM) 10 10 1.5 m/s (300 LFM) 1.5 m/s (300 LFM) 5 5 2.0 m/s (400 LFM) 2.0 m/s (400 LFM) 0 0 30 40 50 60 70 80 30 40 50 60 70 80 Ambient Temperature (ºC) Ambient Temperature (ºC) www.murata-ps.com/support MDC_UCE.E03 Page 7 of 17 Efficiency (%) Output Current (A) Efficiency (%) Output Current (A) Output Current (A) Loss (Watts) UCE Series Isolated, High-Density, Eighth-Brick Low Profile DC-DC Converters TYPICAL PERFORMANCE DATA UCE-5/10-D48 Efficiency Vs. Line Voltage & Load Current @ +25ºC UCE-5/10-D48 Maximum Current Temperature Derating at Sea Level (Vin = 48V, transverse airflow, no baseplate) 100 3.5 11 98 10 96 3 94 9 92 2.5 90 8 88 2 Natural Convection Vin = 75V 86 7 0.5 m/s (100 LFM) Vin = 48V 84 1.5 1.0 m/s (200 LFM) 6 82 Vin = 36V 1.5 m/s (300 LFM) 80 1 5 2.0 m/s (400 LFM) 78 76 Power Dissipation (Vin = 48V) 4 0.5 30 35 40 45 50 55 60 65 70 75 80 85 74 72 Ambient Temperature (ºC) 70 0 1 2 3 4 5 6 7 8 9 10 Load Current (A) UCE-5/20-D48 Efficiency Efficiency and Power Dissipation @ Ta = +25ºC UCE-5/20-D48 Maximum Current Temperature Derating at Sea Level (Vin = 48V, transverse airflow, no baseplate) 96 16 25 94 14 20 92 12 15 90 10 Natural Convection Vin = 75V 88 8 10 0.5 m/s (100 LFM) Vin = 48V 1.0 m/s (200 LFM) Vin = 36V 86 6 1.5 m/s (300 LFM) 5 2.0 m/s (400 LFM) 84 4 0 82 Power Dissipation (Vin = 48V) 2 30 35 40 45 50 55 60 65 70 75 80 85 Ambient Temperature (ºC) 80 0 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Load Current (A) Thermal image with hot spot at full load current with 25 °C ambient; air is flowing at UCE-12/4.2-D48 Efficiency Vs. Line Voltage & Load Current @ +25ºC 100 LFM. Air is flowing across the converter from V– to V+ at 48V input. Identifiable and recommended maximum value to be verified in application. T5 & Q7, max temp = 120 °C / IPC9592 guidelines. 95 90 85 Vin = 75V 80 Vin = 48V Vin = 36V 75 70 65 60 0.6 1.2 1.8 2.4 3.0 3.6 4.2 Load Current (A) www.murata-ps.com/support MDC_UCE.E03 Page 8 of 17 Efficiency (%) Efficiency (%) Power Dissipation (Watts) Power Dissipation (Watts) Efficiency (%) Output Current (A) Output Current (A) UCE Series Isolated, High-Density, Eighth-Brick Low Profile DC-DC Converters TYPICAL PERFORMANCE DATA UCE-12/4.2-D48 Maximum Current Temperature Derating UCE-12/8.3-D48 Efficiency vs Line Voltage & Load Current @ 25ºC (Vin = 48V, no baseplate, longitudinal airflow at sea level) 95 4.25 90 4 Vin = 75V 85 1.0 to 2.0 m/s (200 to 400 LFM) Vin = 48V 3.75 0.5 m/s (100 LFM) Vin = 36V 80 3.5 75 3.25 70 3 3 4 5 6 7 8 30 40 50 60 70 80 Load Current (A) Ambient Temperature (ºC) UCE-12/8.3-D48 Maximum Current Temperature Derating UCE-12/8.3-D48 Maximum Current Temperature Derating at sea level (Vin = 48V, no baseplate, longitudinal airflow at sea level) (Vin = 48V, with baseplate, airflow is from -Vin to +Vin) 9 9 8 8 7 7 0.5 m/s (100 LFM) 6 6 1.0 m/s (200 LFM) 0.5 m/s (100 LFM) 1.5 m/s (300 LFM) 5 1.0 m/s (200 LFM) 5 2.0 m/s (400 LFM) 1.5 m/s (300 LFM) 4 4 2.0 m/s (400 LFM) 3 3 2 2 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 (ºC) Ambient Temperature (ºC) UCE-12/10-D48 Efficiency and Power Dissipation @ Ta = +25ºC UCE-12/10-D48 Maximum Current Temperature Derating at sea level (Vin = 48V, no baseplate, airflow direction from Vin to Vout) 100 12 28 95 10 90 24 85 8 80 20 Vin = 75V 75 Vin = 48V 6 16 Natural Convection 70 Vin = 36V 0.5 m/s (100 LFM) 4 65 12 1.0 m/s (200 LFM) 60 1.5 m/s (300 LFM) 2 8 55 2.0 m/s (400 LFM) 50 0 Power Dissipation (Vin = 48V) 4 30 35 40 45 50 55 60 65 70 75 80 85 45 40 0 Ambient Temperature (ºC) 3 4 5 6 7 8 9 10 Load Current (A) www.murata-ps.com/support MDC_UCE.E03 Page 9 of 17 Efficiency (%) Output Current (A) Output Current (A) Power Dissipation (Watts) Output Current (A) Efficiency (%) Output Current (A) UCE Series Isolated, High-Density, Eighth-Brick Low Profile DC-DC Converters MECHANICAL SPECIFICATIONS Dimensions are in inches (mm shown for ref. only). PIN Shoulder 1-3, 5-7: φ0.078±0.003 (1.98±0.076) Third Angle Projection PIN Shoulder 4,8: Open Frame φ0.100±0.003 (2.54±0.076) Without Baseplate 2.30 (58.4) Tolerances (unless otherwise specified): 0.37 max .XX ± 0.02 (0.5) .XXX ± 0.010 (0.25) (9.4) Angles ± 2˚ 0.18 Components are shown for reference only. 0.015 minimum clearance 2.00 (50.8) (4.6) between standoffs and PINS 1-3, 5-7: highest component 0.040±0.001 (1.016±0.025) dia. PINS 4, 8: 0.062±0.001 (1.575±0.025) dia. 3 4 0.300 (7.62) 0.15 0.900 2 (3.81) (22.9) 0.300 (7.62) 1 DOSA-Compliant Pin 8 Bottom view INPUT/OUTPUT CONNECTIONS Pin Function P32 1 +Vin Standard pin length is shown. Please refer to the Part Number Structure 2 On/Off Control for special order pin lengths. 3 –Vin 4 –Vout 5 –Sense 6 Trim 7 +Sense 8 +Vout www.murata-ps.com/support MDC_UCE.E03 Page 10 of 17 UCE Series Isolated, High-Density, Eighth-Brick Low Profile DC-DC Converters MECHANIC MECHANICAL SPECIFICA AL SPECIFICATIONS TIONS Dimensions are in inches (mm shown for ref. only). With Baseplate Third Angle Projection Screw length must not go through baseplate. PIN Shoulder 1-3, 5-7: φ0.078±0.003 (1.98±0.076) Tolerances (unless otherwise specified): PIN Shoulder 4,8: .XX ± 0.02 (0.5) φ0.100±0.003 (2.54±0.076) .XXX ± 0.010 (0.25) 0.50 Angles ± 2˚ (12.7) Components are shown for reference only. 0.18 0.015 minimum clearance between standoffs and (4.6) highest component 2.00 (50.8) PINS 1-3, 5-7: 0.040±0.001 (1.016±0.025) dia. PINS 4, 8: 0.062±0.001 (1.575±0.025) dia. 3 4 0.300 (7.62) 0.15 0.900 2 (3.81) (22.9) 0.300 (7.62) 1 Pin 8 DOSA-Compliant INPUT/OUTPUT CONNECTIONS Bottom view Pin Function P32 2.00 (50.8) 1 +Vin 2 On/Off Control M3 threaded insert 2 places, See notes 1&2 3 –Vin 0.900 0.600 4 –Vout (15.24) (22.9) 5 –Sense 6 Trim 7 +Sense 8 +Vout 2.30 (58.4) 1. M3 screw used to bolt unit's baseplate to other surfaces (such as heatsink) must not exceed 0.118'' (3mm) depth below the surface of baseplate 2. Applied torque per screw should not exceed 5.3 In-lb (0.6 Nm) Standard pin length is shown. Please refer to the Part Number Struc- ture for special order pin lengths. www.murata-ps.com/support MDC_UCE.E03 Page 11 of 17 UCE Series Isolated, High-Density, Eighth-Brick Low Profile DC-DC Converters Input Source Impedance TECHNICAL NOTES These converters will operate to specifications without external components, Input Fusing assuming that the source voltage has very low impedance and reasonable Certain applications and/or safety agencies may require fuses at the inputs of input voltage regulation. Since real-world voltage sources have finite imped- power conversion components. Fuses should also be used when there is the ance, performance is improved by adding external filter components. Some- possibility of sustained input voltage reversal which is not current-limited. For times only a small ceramic capacitor is sufficient. Since it is difficult to totally greatest safety, we recommend a fast blow fuse installed in the ungrounded characterize all applications, some experimentation may be needed. Note that input supply line with a value which is approximately twice the maximum line external input capacitors must accept high speed switching currents. current, calculated at the lowest input voltage. Because of the switching nature of DC-DC converters, the input of these The installer must observe all relevant safety standards and regulations. For converters must be driven from a source with both low AC impedance and safety agency approvals, install the converter in compliance with the end-user adequate DC input regulation. Performance will degrade with increasing input safety standard. inductance. Excessive input inductance may inhibit operation. The DC input regulation specifies that the input voltage, once operating, must never degrade Input Reverse-Polarity Protection below the Shut-Down Threshold under all load conditions. Be sure to use If the input voltage polarity is reversed, an internal body diode will become adequate trace sizes and mount components close to the converter. forward biased and likely draw excessive current from the power source. If this source is not current-limited or the circuit appropriately fused, it could cause I/O Filtering, Input Ripple Current and Output Noise permanent damage to the converter. Please be sure to install a properly All models in this converter series are tested and specified for input reflected rated external input fuse. ripple current and output noise using designated external input/output compo- nents, circuits and layout as shown in the figures below. External input capaci- Input Under-Voltage Shutdown and Start-Up Threshold tors (Cin in the figure) serve primarily as energy storage elements, minimizing Under normal start-up conditions, converters will not begin to regulate properly line voltage variations caused by transient IR drops in the input conductors. until the rising input voltage exceeds and remains at the Start-Up Threshold Users should select input capacitors for bulk capacitance (at appropriate Voltage (see Specifications). Once operating, converters will not turn off until frequencies), low ESR and high RMS ripple current ratings. In the figure below, the input voltage drops below the Under-Voltage Shutdown Limit. Subsequent the Cbus and Lbus components simulate a typical DC voltage bus. Your specific restart will not occur until the input voltage rises again above the Start-Up system configuration may require additional considerations. Please note that Threshold. This built-in hysteresis prevents any unstable on/off operation at a the values of Cin, Lbus and Cbus will vary according to the specific converter single input voltage. model. Users should be aware however of input sources near the Under-Voltage TO Shutdown whose voltage decays as input current is consumed (such as CURRENT OSCILLOSCOPE PROBE capacitor inputs), the converter shuts off and then restarts as the external +VIN capacitor recharges. Such situations could oscillate. To prevent this, make LBUS + sure the operating input voltage is well above the UV Shutdown voltage AT ALL – VIN TIMES. CBUS CIN + – Start-Up Delay −VIN Assuming that the output current is set at the rated maximum, the Vin to Vout Start-Up Time (see Specifications) is the time interval between the point when CIN = 33µF, ESR < 700mΩ @ 100kHz CBUS = 220µF, ESR < 100mΩ @ 100kHz the rising input voltage crosses the Start-Up Threshold and the fully loaded LBUS = 12µH regulated output voltage enters and remains within its specified regulation band. Actual measured times will vary with input source impedance, external Figure 2. Measuring Input Ripple Current input capacitance, input voltage slew rate and final value of the input voltage In critical applications, output ripple and noise (also referred to as periodic as it appears at the converter. and random deviations or PARD) may be reduced by adding filter elements These converters include a soft start circuit to moderate the duty cycle of the such as multiple external capacitors. Be sure to calculate component tempera- PWM controller at power up, thereby limiting the input inrush current. ture rise from reflected AC current dissipated inside capacitor ESR. The On/Off Remote Control interval from inception to Vout regulated assumes that the converter already has its input voltage stabilized above the Start-Up Threshold before the On command. The interval is measured from the On command until the output enters and remains within its specified regulation band. The specification assumes that the output is fully loaded at maximum rated current. www.murata-ps.com/support MDC_UCE.E03 Page 12 of 17 UCE Series Isolated, High-Density, Eighth-Brick Low Profile DC-DC Converters Note that the temperatures are of the ambient airflow, not the converter +SENSE itself which is obviously running at higher temperature than the outside air. +VOUT Also note that very low flow rates (below about 25 LFM) are similar to “natural convection,” that is, not using fan-forced airflow. RLOAD SCOPE C1 C2 Murata Power Solutions makes Characterization measurements in a closed cycle wind tunnel with calibrated airflow. We use both thermocouples and an infrared camera system to observe thermal performance. As a practical matter, −VOUT it is quite difficult to insert an anemometer to precisely measure airflow in −SENSE most applications. Sometimes it is possible to estimate the effective airflow if you thoroughly understand the enclosure geometry, entry/exit orifice areas and C1 = 1µF the fan flowrate specifications. C2 = 10µF CAUTION: If you exceed these Derating guidelines, the converter may have LOAD 2-3 INCHES (51-76mm) FROM MODULE an unplanned Over Temperature shut down. Also, these graphs are all collected Figure 3. Measuring Output Ripple and Noise (PARD) near Sea Level altitude. Be sure to reduce the derating for higher altitude. Floating Outputs Since these are isolated DC-DC converters, their outputs are “floating” with Output Overvoltage Protection (OVP) respect to their input. The essential feature of such isolation is ideal ZERO This converter monitors its output voltage for an over-voltage condition. If CURRENT FLOW between input and output. Real-world converters however do the output exceeds OVP limits, the sensing circuit will power down the unit, exhibit tiny leakage currents between input and output (see Specifications). and the output voltage will decrease. After a time-out period, the PWM will These leakages consist of both an AC stray capacitance coupling component automatically attempt to restart, causing the output voltage to ramp up to its and a DC leakage resistance. When using the isolation feature, do not allow rated value. It is not necessary to power down and reset the converter for the the isolation voltage to exceed specifications. Otherwise the converter may automatic OVP-recovery restart. be damaged. Designers will normally use the negative output (-Output) as If the fault condition persists and the output voltage climbs to excessive the ground return of the load circuit. You can however use the positive output levels, the OVP circuitry will initiate another shutdown cycle. This on/off cycling (+Output) as the ground return to effectively reverse the output polarity. is referred to as “hiccup” mode. Minimum Output Loading Requirements Output Fusing All models regulate within specification and are stable under no load to full The converter is extensively protected against current, voltage and temperature load conditions. Operation under no load might however slightly increase extremes. However your application circuit may need additional protection. In output ripple and noise. the extremely unlikely event of output circuit failure, excessive voltage could be applied to your circuit. Consider using appropriate external protection. Thermal Shutdown To protect against thermal overstress, these converters include thermal Output Current Limiting shutdown circuitry. If environmental conditions cause the temperature of the As soon as the output current increases to approximately 125% to 150% of DC-DC’s to rise above the Operating Temperature Range up to the shutdown its maximum rated value, the DC-DC converter will enter a current-limiting temperature, an on-board electronic temperature sensor will power down mode. The output voltage will decrease proportionally with increases in output the unit. When the temperature decreases below the turn-on threshold, the current, thereby maintaining a somewhat constant power output. This is also converter will automatically restart. There is a small amount of hysteresis to commonly referred to as power limiting. prevent rapid on/off cycling. The temperature sensor is typically located adja- cent to the switching controller, approximately in the center of the unit. See the Current limiting inception is defined as the point at which full power falls Performance and Functional Specifications. below the rated tolerance. See the Performance/Functional Specifications. Note particularly that the output current may briefly rise above its rated value CAUTION: If you operate too close to the thermal limits, the converter may in normal operation as long as the average output power is not exceeded. This shut down suddenly without warning. Be sure to thoroughly test your applica- enhances reliability and continued operation of your application. If the output tion to avoid unplanned thermal shutdown. current is too high, the converter will enter the short circuit condition. Temperature Derating Curves Output Short Circuit Condition The graphs in this data sheet illustrate typical operation under a variety of When a converter is in current-limit mode, the output voltage will drop as the conditions. The Derating curves show the maximum continuous ambient air output current demand increases. If the output voltage drops too low (approxi- temperature and decreasing maximum output current which is acceptable mately 98% of nominal output voltage for most models), the magnetically under increasing forced airflow measured in Linear Feet per Minute (“LFM”). coupled voltage used to develop the PWM bias voltage will also drop, thereby Note that these are AVERAGE measurements. The converter will accept brief shutting down the PWM controller. Following a time-out period, the PWM will increases in current or reduced airflow as long as the average is not exceeded. restart, causing the output voltage to begin rising to its appropriate value. www.murata-ps.com/support MDC_UCE.E03 Page 13 of 17 UCE Series Isolated, High-Density, Eighth-Brick Low Profile DC-DC Converters If the short-circuit condition persists, another shutdown cycle will initiate. Contact and PCB resistance losses due to IR drops This rapid on/off cycling is called “hiccup mode.” The hiccup cycling reduces the average output current, thereby preventing excessive internal temperatures 1 +VOUT +VIN and/or component damage. I OUT +SENSE The “hiccup” system differs from older latching short circuit systems Sense Current because you do not have to power down the converter to make it restart. The system will automatically restore operation as soon as the short circuit condi- ON/OFF 2 TRIM LOAD tion is removed. CONTROL Sense Return Remote Sense Input −SENSE Use the Sense inputs with caution. Sense is normally connected at the load. I OUT Return 3 Sense inputs compensate for output voltage inaccuracy delivered at the load. −VIN -VOUT This is done by correcting IR voltage drops along the output wiring and the Contact and PCB resistance current carrying capacity of PC board etch. This output drop (the difference losses due to IR drops between Sense and Vout when measured at the converter) should not exceed 0.5V. Consider using heavier wire if this drop is excessive. Sense inputs also Figure 4. Remote Sense Circuit Configuration improve the stability of the converter and load system by optimizing the control Trimming the Output Voltage loop phase margin. The Trim input to the converter allows the user to adjust the output voltage Note: The Sense input and power Vout lines are internally connected through over the rated trim range (please refer to the Specifications). In the trim equa- low value resistors to their respective polarities so that the converter can tions and circuit diagrams that follow, trim adjustments use either a trimpot or operate without external connection to the Sense. Nevertheless, if the Sense a single fixed resistor connected between the Trim input and either the +Sense function is not used for remote regulation, the user should connect +Sense to or –Sense terminals. (On some converters, an external user-supplied precision +Vout and –Sense to –Vout at the converter pins. DC voltage may also be used for trimming). Trimming resistors should have a low temperature coefficient (±100 ppm/deg.C or less) and be mounted close The remote Sense lines carry very little current. They are also capacitively to the converter. Keep leads short. If the trim function is not used, leave the coupled to the output lines and therefore are in the feedback control loop to trim unconnected. With no trim, the converter will exhibit its specified output regulate and stabilize the output. As such, they are not low impedance inputs voltage accuracy. and must be treated with care in PC board layouts. Sense lines on the PCB should run adjacent to DC signals, preferably Ground. In cables and discrete There are two CAUTIONs to observe for the Trim input: wiring, use twisted pair, shielded tubing or similar techniques. CAUTION: To avoid unplanned power down cycles, do not exceed EITHER Any long, distributed wiring and/or significant inductance introduced into the the maximum output voltage OR the maximum output power when setting the Sense control loop can adversely affect overall system stability. If in doubt, test trim. Be particularly careful with a trimpot. If the output voltage is excessive, your applications by observing the converter’s output transient response during the OVP circuit may inadvertantly shut down the converter. If the maximum step loads. There should not be any appreciable ringing or oscillation. You power is exceeded, the converter may enter current limiting. If the power is may also adjust the output trim slightly to compensate for voltage loss in any exceeded for an extended period, the converter may overheat and encounter external filter elements. Do not exceed maximum power ratings. overtemperature shut down. Please observe Sense inputs tolerance to avoid improper operation: CAUTION: Be careful of external electrical noise. The Trim input is a senstive input to the converter’s feedback control loop. Excessive electrical noise may [Vout(+) −Vout(-)] − [Sense(+) −Sense(-)] ≤ 10% of Vout cause instability or oscillation. Keep external connections short to the Trim Output overvoltage protection is monitored at the output voltage pin, not the input. Use shielding if needed. Sense pin. Therefore excessive voltage differences between Vout and Sense together with trim adjustment of the output can cause the overvoltage protec- tion circuit to activate and shut down the output. Power derating of the converter is based on the combination of maximum output current and the highest output voltage. Therefore the designer must ensure: (Vout at pins) x (Iout) ≤ (Max. rated output power) www.murata-ps.com/support MDC_UCE.E03 Page 14 of 17 UCE Series Isolated, High-Density, Eighth-Brick Low Profile DC-DC Converters Trimming by Using an External Voltage Source 1. The easiest way to trim the output using an external voltage source is to +VOUT +VIN drive the Trim pin directly from a variable source. The following equation can External be used to calculate the voltage at the Trim pin. +SENSE source + Vo ON/OFF TRIM LOAD Vtrim = 2 x 1.225 x − 1.225 – CONTROL Vonominal –SENSE Vo is the output voltage you want; Vonominal is the nominal output voltage; Vtrim is the voltage that should appear at the trim pin. –VIN –VOUT 2. If the purpose of trimming is to compensate voltage drop of power path from converter to the Load, you may separately connect the sense pin directly Figure 5. Trimming with an external source to the load. It’s much easier than real time adjusting trim voltage. 3. CAUTION: To avoid unplanned power down cycles, do not exceed EITHER the maximum output voltage OR the maximum output power when setting the trim. If the output voltage is excessive, the OVP circuit may shut down the converter. If the maximum power is exceeded, the converter may enter current limiting. If the power is exceeded for an extended period, the converter may overheat and encounter overtemperature shut down. Be careful of external electrical noise. The Trim input is a sensitive input to the converter’s feedback control loop. Excessive electrical noise may cause instability or oscillation. Trim Equations Trim Equations Trim Down Trim Up Connect trim resistor between Connect trim resistor between trim pin and −Sense trim pin and +Sense 5.11 × VNOM × (1+∆) 5.11 − 5.11 R (k Ω) = − 10.22 R (k Ω) = − 10.22 TrimDn TrimUp ∆ 1.225 × ∆ ∆ Where, ∆ = | (VNOM − VOUT) / VNOM | VNOM is the nominal, untrimmed output voltage. VOUT is the desired new output voltage. Do not exceed the specified trim range or maximum power ratings when adjusting trim. Use 1% precision resistors mounted close to the converter on short leads. www.murata-ps.com/support MDC_UCE.E03 Page 15 of 17 UCE Series Isolated, High-Density, Eighth-Brick Low Profile DC-DC Converters Trim Circuits +VOUT +VIN +VCC +SENSE ON/OFF ON/OFF TRIM LOAD CONTROL CONTROL –SENSE -VIN –VIN –VOUT Figure 6. Trim Connections Using A Trimpot Figure 8. Driving the On/Off Control Pin (suggested circuit) +VOUT +VOUT +VIN +VIN +SENSE +SENSE RTRIM DOWN ON/OFF ON/OFF TRIM TRIM LOAD LOAD CONTROL CONTROL RTRIM UP –SENSE –SENSE –VIN –VIN –VOUT –VOUT Figure 7. Trim Connections To Increase Output Voltages Figure 9. Trim Connections To Decrease Output Voltages Connect sense to its respective Vout pin if sense is not used with a remote load. Remote On/Off Control There are two CAUTIONs for the On/Off Control: On the input side, a remote On/Off Control can be specified with either positive CAUTION: While it is possible to control the On/Off with external logic if or negative logic logic. you carefully observe the voltage levels, the preferred circuit is either an open drain/open collector transistor, a switch or a relay (which can thereupon be Positive: Models equipped with positive logic are enabled when the On/Off controlled by logic) returned to negative Vin. pin is left open or is pulled high to +Vin with respect to –Vin. An internal bias current causes the open pin to rise to approximately +15V. Some models will CAUTION: Do not apply voltages to the On/Off pin when there is no input also turn on at lower intermediate voltages (see Specifications). Positive-logic power voltage. Otherwise the converter may be permanently damaged. devices are disabled when the On/Off is grounded or brought to within a low voltage (see Specifications) with respect to –Vin. Output Capacitive Load These converters do not require external capacitance added to achieve rated Negative: Models with negative logic are on (enabled) when the On/Off is specifications. Users should only consider adding capacitance to reduce switch- grounded or brought to within a low voltage (see Specifications) with respect to ing noise and/or to handle spike current step loads. Install only enough capaci- –Vin. The device is off (disabled) when the On/Off is left open or is pulled high tance to achieve noise objectives. Excess external capacitance may cause to approximately +15V with respect to –Vin. regulation problems, slower transient response and possible instability. Proper Dynamic control of the On/Off function should be able to sink the speci- wiring of the Sense inputs will improve these factors under capacitive load. fied signal current when brought low and withstand appropriate voltage The maximum rated output capacitance and ESR specification is given for a when brought high. Be aware too that there is a finite time in milliseconds capacitor installed immediately adjacent to the converter. Any extended output (see Specifications) between the time of On/Off Control activation and stable, wiring or smaller wire gauge or less ground plane may tolerate somewhat higher regulated output. This time will vary slightly with output load type and current capacitance. Also, capacitors with higher ESR may use a larger capacitance. and input conditions. www.murata-ps.com/support MDC_UCE.E03 Page 16 of 17 UCE Series Isolated, High-Density, Eighth-Brick Low Profile 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 airflow and heat dissipation analysis of power products. IR Transparent The system includes a precision low flow-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 airflow studies are possible by rotation of this carrier element board since there are often significant differences in the heat Precision dissipation in the two airflow directions. The combination of low-rate adjustable airflow, 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 airflow turbulence. Such turbu- temperature lence influences 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 10. 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. Specifications are subject to change without notice. ©201 8 Murata Power Solutions, Inc. www.murata-ps.com/support MDC_UCE.E03 Page 17 of 17