MURATA POWER SOLUTIONS UCH-12/4.2-D48NB-C

Single Output UCH Models www.murata-ps.com Isolated, “Half-Brick” 1.8−15V Output DC/DC Converters PRODUCT OVERVIEW Typical Unit The high efficiency, low noise and long-term reli- impressive efficiencies. Output voltages are ability that defines Murata Power Solutions’ DC/ 1.8 to 15 Volts. The input voltage range is 36 to 75 DC Converters now comes to you in the standard or 18 to 36 Volts. All models meet the Low Voltage “half-brick” configuration (2.3˝ x 2.4˝ x 0.40˝). Directive (LVD). Our new UCH Series is certified to UL/EN60950- For high reliability and affordability, Murata 1 safety requirements (some models pending), Power Solutions utilizes high-speed automatic including each European country’s deviations. All assembly to construct the UCH’s proven SMT- models have BASIC insulation; guarantee 2250Vdc on-pcb designs. An optional baseplate offers full (in to out) isolation; and because they are designed output power at maximum temperature. with Class B thermal insulation, satisfy all safety UCH’s feature input filters, input undervoltage FEATURES requirements over their full operating tempera- and overvoltage lockout, output current limiting, n Standard “half-brick” configuration tures. Construction/attach meets stringent RoHS-6 short-circuit protection, and thermal shutdown. specifications. Additionally, all devices have output trim capability n Certified to UL-60950-1, CSA-C22.2 No. UCH Models are designed for demanding tele- and an on/off control pin that can be ordered with 60950-1, IEC\EN 60950-1, 2nd edition com, datacom and networking applications. Their either logic type. (some models pending) “semi-synchronous-rectifier” design achieves n Fully isolated, 2250Vdc guaranteed n Output voltages: 1.8 – 15 Volts n Vin range: 36-75V or 18-36V n Full 50-150 Watt output power n Reliable SMT-on-pcb construction n Input under and output overvoltage shutdown n Output current limiting and short-circuit protection n On/off, VOUT trim and sense functions n Modifications and customs for OEMs +SENSE n RoHS-6 construction/attach (6) +VOUT +VIN (5) (4) CASE SWITCH (2) CONTROL –VOUT (9) –VIN –SENSE (1) (8) PMW OPTO REFERENCE & CONTROLLER ISOLATION ERROR MAP VOUT TRIM (7) INPUT UNDERVOLTAGE, INPUT Typical topology is shown. OVERVOLTAGE, AND OUTPUT OVERVOLTAGE COMPARATORS *Can be ordered with positive (standard) REMOTE* or negative (optional) polarity. ON/OFF CONTROL Figure 1. Simplified Schematic (3) (some models pending For full details go to certification) REG.-Nr C457 . www.murata-ps.com/rohs www.murata-ps.com/support MDC_UCH Models.D03 Page 1 of 18 Single Output UCH Models Isolated, “Half-Brick” 1.8−15V Output DC/DC Converters PERFORMANCE SPECIFICATIONS SUMMARY AND ORDERING GUIDE ➀ Output Input Package C61 R/N (mVp-p) ➁ Regulation (Max.) Efficiency Case Iin, Iin, full Vout Iout Power Vin Nom. Range no load load inches Root Family ➀ (Volts) (Amps) (Watts) Typ. Max. Line Load (Volts) (Volts) (mA) (Amps) Min. Typ. (mm) UCH-1.8/40-D48N-C 1.8 40 72 50 100 ±0.125% ±0.25% 48 36-75 50 1.72 85% 87% UCH-2.5/40-D48N-C 2.5 40 100 100 ±0.1% ±0.2% 48 36-75 50 2.34 87.5% UCH-3.3/10-D24P-C 10 33 ±0.2% 24 18-36 1.54 UCH-3.3/10-D48N-C 10 33 ±0.2% 48 36-75 0.77 89% 50 87% UCH-3.3/15-D48N-C 3.3 15 49.5 80 ±0.125% 48 36-75 1.16 UCH-3.3/35-D24P-C 35 115.5 ±0.125% 24 18-36 5.41 100 2.4×2.28×0.40 UCH-3.3/30-D48N-C 30 99 ±0.125% 48 36-75 2.29 89% 90% (61×57.9×10.2) UCH-5/10-D48N-C 10 50 60 150 ±0.125% ±0.25% 48 36-75 1.17 85.5% 89% UCH-5/20-D24P-C 5 20 100 50 ±0.125% 24 18-36 4.6 90.5% 100 89% UCH-5/30-D48N-C 30 150 60 ±0.125% 3.43 91% UCH-12/4.2-D48N-C 12 4.2 50.4 80 150 ±0.125% 1.16 87.5% 90.5% 48 36-75 UCH-12/12.5-D48N-C 12 12.5 150 50 90 3.37 89% 92.6% 150 ±0.125% UCH-15/6.7-D48N-C ➂ 15 6.7 100.5 70 2.28 90% 92% ➀ Please refer to the full model number structure for additional ordering part numbers and options. ➁ All specifications are at nominal line voltage and full load, +25 °C. unless otherwise noted. See detailed specifications. Output capacitors are 1 µF ceramic in parallel with 10 µF electrolytic . Input cap is 22 µF, low ESR. I/O caps are necessary for our test equipment and may not be needed for your application. ➂ Pending UL and VDE certification. As of October 2016, ONLY the following part number will be available: UCH-5/20-D24PB-C PART NUMBER STRUCTURE U CH - 5 / 30 - D48 N B H LX - C Output RoHS Hazardous Materials Compliance Configuration: C = RoHS-6 (does not claim EU RoHS exemption 7b–lead in solder), standard Unipolar Single Output Y = RoHS-5 (with lead), optional, special order Half-brick package Pin Length Option Blank = Standard pin length, 0.180 inches (4.6mm) Nominal Output Voltage L1 = 0.110 inches (2.79mm) * L2 = 0.145 inches (3.68mm) * Maximum Rated Output: Current in Amps Conformal Coating Option Blank = No coating, standard Input Voltage Range: H = Coating added, optional D24 = 18-36 Volts * (built to order; contact Murata Power Solutions for MOQ and lead times.) D48 = 36-75 Volts Optional Baseplate Blank = No Baseplate, standard Special quantity order is required; B = Baseplate installed, optional quantity order * no sample quantities available. On/Off Control Logic Note: P = Positive logic (standard for D24, optional for D48) Some model number combinations N = Negative logic (standard for D48, optional for D24) may not be available. Please contact Murata Power Solutions. www.murata-ps.com/support MDC_UCH Models.D03 Page 2 of 18 Single Output UCH Models Isolated, “Half-Brick” 1.8−15V Output DC/DC Converters FUNCTIONAL SPECIFICATIONS ➀ UCH-1.8/40-D48 UCH-2.5/40-D48 UCH-3.3/10-D24 UCH-3.3/10-D48 UCH-3.3/15-D48 UCH-3.3/35-D24 UCH-3.3/30-D48 Input Input voltage range See ordering guide Start-up threshold, Volts 34 34 16 34 34 16 34 Undervoltage 32 31 15 31 31 15 31 shutdown, V Overvoltage shutdown none Reflected (back) ripple cur- 10 20 10 15 15 15 10 rent, mA pk-pk Input Current Full load conditions See ordering guide. 2 Inrush transient, A sec 0.05 Output short circuit, mA 50 Low line (Vin = min.), Amps 2.30 1.54 2.06 1.03 1.54 7.21 3.09 Standby mode, mA 2 10 8 (Off, UV, OT shutdown) Internal input filter type Pi L-C External recommended fast 10 3 5 3 3 12.5 7.5 blow fuse, Amps Reverse polarity None. Install external fuse. protection Remote On/Off Control Positive logic OFF = Ground pin to +1V max. (P model suffix) ON = Open or +3.5 to +13.5V max Negative logic OFF = Open or +2.5V to +15V max. (N model suffix) ON = –0.1V to +0.8V max Current, mA 1 Output Voltage output range See ordering guide. Voltage output accuracy ±1% of Vnom (50% load) Adjustment range –10 to +10% of Vnom. Temperature coefficient ±0.02% of Vout range per °C over oper. temp. range Minimum loading No minimum loading. Remote sense +10%. 17 compensation Ripple/noise See ordering guide. (20 MHz bandwidth) Line/Load regulation See ordering guide. Efficiency See ordering guide. Maximum capacitive loading, Low ESR <0.02Ω max., 10,000 max. resistive load, μF www.murata-ps.com/support MDC_UCH Models.D03 Page 3 of 18 Single Output UCH Models Isolated, “Half-Brick” 1.8−15V Output DC/DC Converters UCH-5/10-D48 UCH-5/20-D24 UCH-5/30-D48 UCH-12/4.2-D48 UCH-12/12.5-D48 UCH-15/6.7-D48 Input Input voltage range See ordering guide. Start-up threshold, Volts 34 16 35 35 35 35 Undervoltage 33 15 34 33.5 33.5 33 shutdown, V Overvoltage shutdown none Reflected (back) ripple cur- 15 20 15 20 20 20 rent, mA pk-pk Input Current Full load conditions See ordering guide. 2 Inrush transient, A sec 0.05 Output short circuit, mA 50 Low line (Vin = min.), Amps 1.54 6.17 4.63 1.51 4.47 3.06 Standby mode, mA 4 10 4 1 (Off, UV, OT shutdown) Internal input filter type Pi L-C Pi L-C External recommended fast 10 10 7.5 10 7.5 blow fuse, Amps Reverse polarity None. Install external fuse. protection Remote On/Off Control Positive logic OFF = Ground pin to +1V max. (P model suffix) ON = Open or +3.5 to +15V max Negative logic OFF = Open or +2.5V to +15V max. (N model suffix) ON = –0.1V to +0.8V max Current, mA 1 Output Voltage output range See ordering guide. Voltage output accuracy ±1% of Vnom. Adjustment range –10 to +10% of Vnom. Temperature coefficient ±0.02% of Vout range per °C over oper. Temp. range Minimum loading No minimum loading. Remote sense +10%. 17 compensation Ripple/noise See ordering guide. (20 MHz bandwidth) Line/Load regulation See ordering guide. Efficiency See ordering guide. Maximum capacitive loading, Low ESR <0.02Ω max., 10,000 10,000 max. 20,000 max. 5000 10,000 1,000 resistive load, μF www.murata-ps.com/support MDC_UCH Models.D03 Page 4 of 18 Single Output UCH Models Isolated, “Half-Brick” 1.8−15V Output DC/DC Converters UCH-1.8/40-D48 UCH-2.5/40-D48 UCH-3.3/10-D24 UCH-3.3/10-D48 UCH-3.3/15-D48 UCH-3.3/35-D24 UCH-3.3/30-D48 Isolation Voltage Input to Output, Volts min. 2250 Input to baseplate, Volts min. 1500 Baseplate to output, Volts min. 1500 Isolation resistance, MΩ 100 Isolation capacitance, pF 1000 Isolation safety rating Basic insulation Current limit inception (98% of 59 max. 49 15 15 19 40 35 Vout, after warmup), Amps Short circuit protection method Current limiting, hiccup autorestart. Remove overload for recovery. Short circuit current, Amps 5 Short circuit duration Output may be shorted continuously to ground (no damage). Overvoltage protection, Volts 2.7 max. 3.75 max. 4.95 V max 4.62 max. 4.95 max. (via magnetic feedback) Prebiased Startup Starts if external voltage is less than Vnom. Dynamic characteristics Dynamic load response 100 µSec to ±1% 100 µSec to ±1% 200 µSec to ±1% 200 µSec to ±1% 200 µSec to ±1% 200 µSec to ±1% 200 µSec to ±1% (50-75-50% load step) of final value of final value of final value of final value of final value of final value of final value Start-up time Vin to Vout regulated, mSec 10 max. Remote On/Off to Vout 10 max. regulated, mSec Switching frequency, KHz 360 420 ± 40 330 ± 40 Environmental Calculated MTBF 1.6M hrs. TBD 1.8M hrs. TBD Operating ambient temperature −40 to +85 (See Derating Curves) range, °C (with derating) Operating PC board −40 to +110 temperature, °C Storage temperature range, °C −55 to +125 Thermal protection/shutdown, °C +115 +115 +120 Relative humidity To +85°C/85%, non-condensing Soldering Guidelines Murata Power Solutions recommends the specifications below when installing these converters. These specifications vary depending on the solder type. Exceeding these specifica- tions 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: 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 www.murata-ps.com/support MDC_UCH Models.D03 Page 5 of 18 Single Output UCH Models Isolated, “Half-Brick” 1.8−15V Output DC/DC Converters UCH-5/10-D48 UCH-5/20-D24 UCH-5/30-D48 UCH-12/4.2-D48 UCH-12/12.5-D48 UCH-15/6.7-D48 Isolation Voltage Input to Output, Volts min. 2250 Input to baseplate, Volts min. 1500 Baseplate to output, Volts min. 1500 Isolation resistance, MΩ 100 Isolation capacitance, pF 1000 Isolation safety rating Basic insulation Miscellaneous Current limit inception (98% of Vout, 13 26 35 5.4 14.5 7.4 after warmup), Amps Short circuit protection method Current limiting, hiccup autorestart. Remove overload for recovery. Short circuit current, Amps 5 Short circuit duration Output may be shorted continuously to ground (no damage). Overvoltage protection, Volts 7.75 max. 7.5 max. 7.5 18 max. 16.8 max. 17.5 (via magnetic feedback) Prebiased Startup Starts if external voltage is less than Vnom. Dynamic characteristics Dynamic load response 200 µSec to ±1% 200 µSec to ±1% 200 µSec to ±1% 250 µSec to ±1% 250 µSec to ±1% 250 µSec to ±1% (50-75-50% load step) of final value of final value of final value of final value of final value of final value Start-up time Vin to Vout regulated, mSec 10 max. Remote On/Off to Vout 10 max. regulated, mSec Switching frequency, KHz 300 ± 30 330 ± 40 300 ± 30 335 ± 35 335 ± 35 350 ± 40 Environmental Calculated MTBF 1.6M hours TBD 1.9M hours 1.6M hours TBD Operating ambient temperature −40 to +85 (See Derating Curves) range, °C (with derating) Operating PC board −40 to +110 temperature, °C Storage temperature range, °C −55 to +125 Thermal protection/shutdown, °C +120 +115 Relative humidity To +85°C/85%, non-condensing www.murata-ps.com/support MDC_UCH Models.D03 Page 6 of 18 Single Output UCH Models Isolated, “Half-Brick” 1.8−15V Output DC/DC Converters UCH-1.8/40-D48 UCH-2.5/40-D48 UCH-3.3/10-D24 UCH-3.3/10-D48 UCH-3.3/15-D48 UCH-3.3/35-D24 UCH-3.3/30-D48 Physical Outline dimensions See mechanical specs. Baseplate material Aluminum Pin material Gold plated copper alloy with nickel underplate Pin diameter 0.04/0.08 inches (1.016/2.032 mm) Weight, ounces 1.68 2 Weight, grams 47 60 Electromagnetic interference (conducted and Certified to EN55022/CISPR22 radiated) (external filter required) Flammability UL94V-0 Safety Certified to UL 60950-1, CSA C22.2 No.60950-1, IEC/EN 60950-1, 2nd edition (some models pending). UCH-5/10-D48 UCH-5/20-D24 UCH-5/30-D48 UCH-12/4.2-D48 UCH-12/12.5-D48 UCH-15/6.7-D48 Physical Outline dimensions See mechanical specs. Baseplate material Aluminum Pin material Gold plated copper alloy with nickel underplate Pin diameter 0.04/0.08 inches (1.016/2.032 mm) Weight, ounces 2 1.73 Weight, grams 60 49 Electromagnetic interference (conducted and Certified to EN55022/CISPR22 radiated) (external filter required) Flammability UL94V-0 Safety Certified to UL 60950-1, CSA C22.2 No.60950-1, IEC/EN 60950-1, 2nd edition (some models pending). www.murata-ps.com/support MDC_UCH Models.D03 Page 7 of 18 Single Output UCH Models Isolated, “Half-Brick” 1.8−15V Output DC/DC Converters Absolute Maximum Ratings Input Voltage: D24 Models - Volts, max. continuous 0-36 VDC Volts, transient, 100 mSec 50 VDC D48 Models - Volts, max. continuous 0-75 VDC Volts, transient, 100 mSec 100 VDC On/Off Control -0.7 V. min to +15V max. Input Reverse-Polarity Protection None. Install external fuse. Output Overvoltage Vout nom. +20% max. Output Current Current-limited. Devices can withstand sustained short circuit without damage. The outputs are not intended to accept appreciable reverse current. Overtemperature Protection Device includes electronic overtemperature shutdown protection under normal operation. Storage Temperature -55 to +125° C Lead Temperature See soldering specifications 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 Specifications Table is not implied. Specification Notes: (1) All models are tested and specified with external 1 µF paralleled with 10 µF output capacitors (9) All models are fully operational and meet published specifications, including “cold start” at –40°C. and no external input capacitor. All capacitors are low ESR types. These capacitors are necessary to At full power, the package temperature of all on-board components must not exceed +128°C. accommodate our test equipment and may not be required to achieve specified performance in your applications. All models are stable and regulate within spec under no-load conditions. (10) Regulation specifications describe the deviation as the line input voltage or output load current is varied from a nominal midpoint value to either extreme. All specifications are typical unless noted. General conditions for Specifications are +25°C, Vin=nominal, Vout=nominal, full load. Adequate airflow must be supplied for extended testing under (11) The output overvoltage protection is automatic recovery. The overvoltage may occur either from power. internal failure or from an external forcing voltage as in a shared power system. (2) Input Back Ripple Current is tested and specified over a 5 Hz to 20 MHz bandwidth. Input filtering (12) Output current limit and short circuit protection is non-latching. When the overcurrent fault is is Cin=33 µF, 100V, Cbus=220 μF, 100V, Lbus=12 µH. removed, the converter will immediately recover. After an output overcurrent or short circuit, “hiccup” operation repeatedly attempts to restart the converter with a brief, full-current output. If the overcurrent (3) Note that Maximum Power Derating curves indicate an average current at nominal input voltage. condition still exists, the restart current will be removed and then tried again. This short current pulse At higher temperatures and/or lower airflow, the DC/DC converter will tolerate brief full current outputs prevents overheating and damaging the converter. Once the fault is removed, the converter immedi- if the total RMS current over time does not exceed the Derating curve. All Derating curves are pre- ately resumes normal operation. sented at sea level altitude. Be aware of reduced power dissipation with increasing altitude. (13) Do not exceed maximum power specifications when adjusting the output trim. (4) Mean Time Before Failure is calculated using the Telcordia (Belcore) SR-332 Method 1, Case 3, ground fixed conditions, Tpcboard=+25°C, full load, natural air convection. (14) At zero output current, the output may contain low frequency components which exceed the ripple specification. The output may be operated indefinitely with no load. (5) The On/Off Control is normally selected by a switch or an open collector or open drain transistor. But it may also be driven with external logic or by applying appropriate external voltages which are (15) If reverse polarity is accidentally applied to the input, to ensure reverse input protection with full referenced to Input Common and comply with the On/Off voltage specifications. output load, always connect an external input fuse in series with the +Vin input. Use approximately twice the full input current rating with nominal input voltage. (6) Output current limiting begins when the output voltage degrades approximately 2% from the selected setting. (16) Output accuracy is dependent on user-supplied trim resistors. To achieve high accuracy, use ±1% or better tolerance metal-film resistors mounted close to the converter. (7) The outputs are not intended to sink appreciable reverse current. (17) Normally, the Sense lines are connected at the remote load to compensate for IR voltage drops (8) Output noise may be further reduced by adding an external filter. Logic circuits with low power in the power wiring and to improve dynamic response. If Sense is not used, each Sense pin should be voltages may have a small voltage margin between logic ZERO and logic ONE, requiring noise sup- connected at the converter to its respective Vout pin. pression. Use only as much output filtering as needed to achieve your noise requirements. Excessive output capacitance can retard transient response or possibly cause instability. Low ESR ceramic CAUTION: This product is not internally fused. To comply with safety agency certifications and to capacitors may degrade dynamic performance. Be sure to thoroughly test your system under full load avoid injury to personnel or equipment, the user must connect an external fast-blow fuse to the input with all components installed. terminals. www.murata-ps.com/support MDC_UCH Models.D03 Page 8 of 18 Single Output UCH Models Isolated, “Half-Brick” 1.8−15V Output DC/DC Converters TYPICAL PERFORMANCE DATA UCH-1.8/40-D48 Maximum Current Temperature Derating (at sea level) UCH-1.8/40-D48 Efficiency and Power Dissipation No baseplate, VIN = 48V, airflow is from VIN to VOUT vs Line Voltage and Load Current @25˚C 45 95 12.1 90 11 40 85 9.9 80 8.8 35 VIN = 36V 75 7.7 VIN = 75V 30 70 VIN = 48V 6.6 5.5 65 25 Power Dissipation 400 lfm 60 4.4 (VIN = 48V) 300 lfm 55 3.3 20 200 lfm 100 lfm 50 2.2 15 45 1.1 40 0 10 4 8 12 16 20 24 28 32 36 40 30 35 40 45 50 55 60 65 70 75 80 85 Load Current (Amps) Ambient Temperature ( C) ° UCH-2.5/40-D48 Maximum Current Temperature Derating (at sea level) UCH-2.5/40-D48 Efficiency and Power Dissipation No baseplate, VIN = 48V, transverse airflow vs Line Voltage and Load Current @25˚C 40 95 10 9 38 90 8 36 85 7 VIN = 36V 34 6 80 32 VIN = 48V 5 75 Power Dissipation 4 VIN = 75V 30 (VIN = 48V) 400 lfm 3 70 28 300 lfm 2 200 lfm 65 100 lfm 26 1 0 60 24 3 6 9 12 15 18 21 24 27 30 40 50 60 70 80 Load Current (Amps) Ambient Temperature ( C) ° UCH-3.3/10-D24 Efficiency and Power Dissipation UCH-3.3/10-D48 Maximum Current Temperature Derating vs Line Voltage and Load Current @25˚C vs Line Voltage and Load Current @25˚C 90 95 4 6 90 3.8 85 5 85 3.6 80 4 80 3.4 VIN = 36V VIN = 75V 75 3 VIN = 48V VIN = 24V 75 3.2 VIN = 36V VIN = 18V Power Dissipation Power Dissipation 70 2 (VIN = 48V) (VIN = 24V) 70 3.0 65 1 65 2.8 3 4 5 6 7 8 9 10 3 4 5 6 7 8 9 10 Load Current (Amps) Load Current (Amps) www.murata-ps.com/support MDC_UCH Models.D03 Page 9 of 18 Efficiency (%) Efficiency (%) Efficiency (%) Power Dissipation (Watts) Power Dissipation (Watts) Power Dissipation (Watts) Efficiency (%) Output Current (Amps) Output Current (Amps) Power Dissipation (Watts) Single Output UCH Models Isolated, “Half-Brick” 1.8−15V Output DC/DC Converters TYPICAL PERFORMANCE DATA UCH-3.3/15-D48 Efficiency and Power Dissipation vs Line Voltage and Load Current @25˚C 10 95 90 9 85 8 VIN = 75V 80 7 VIN = 48V 75 6 70 5 VIN = 36V 65 4 Power Dissipation (VIN = 48V) 60 3 2 55 3 4 5 6 7 8 9 10 11 12 13 14 15 Load Current (Amps) UCH-3.3/35-D24 Maximum Current Temperature Derating (at sea level) UCH-3.3/35-D24 Efficiency and Power Dissipation No baseplate, VIN = 24V, transverse airflow vs Line Voltage and Load Current @25˚C 40 95 20 18 36 16 90 32 14 VIN = 36V 28 85 12 VIN = 24V 10 24 80 8 20 VIN = 18V 6 400 lfm Power Dissipation 16 300 lfm (VIN = 24V) 75 4 200 lfm 100 lfm 12 2 70 0 8 3 6 9 12 15 18 21 24 27 30 33 30 40 50 60 70 Load Current (Amps) Ambient Temperature ( C) ° UCH-3.3/30-D48 Maximum Current Temperature Derating (at sea level) UCH-3.3/30-D48 Efficiency and Power Dissipation No baseplate, VIN = 48V, transverse airflow vs Line Voltage and Load Current @25˚C 31 95 10 9 30 90 8 29 85 7 VIN = 75V 28 6 80 5 27 VIN = 48V 75 100 lfm 200 lfm 4 Power Dissipation 26 VIN = 36V (VIN = 48V) 300 lfm 3 70 25 2 65 1 24 0 60 23 3 6 9 12 15 18 21 24 27 30 30 40 50 60 70 80 Load Current (Amps) Ambient Temperature ( C) ° www.murata-ps.com/support MDC_UCH Models.D03 Page 10 of 18 Efficiency (%) Efficiency (%) Efficiency (%) Power Dissipation (Watts) Power Dissipation (Watts) Power Dissipation (Watts) Output Current (Amps) Output Current (Amps) Single Output UCH Models Isolated, “Half-Brick” 1.8−15V Output DC/DC Converters TYPICAL PERFORMANCE DATA UCH-5/20-D24 Maximum Current Temperature Derating (at sea level) UCH-5/20-D24 Efficiency and Power Dissipation No baseplate, VIN = 24V, transverse airflow vs Line Voltage and Load Current @25˚C 20 95 20 18 18 90 16 14 VIN = 36V 16 85 12 VIN = 24V 10 14 80 8 VIN = 18V 100 lfm 200 lfm 300 lfm 400 lfm Power Dissipation 6 (VIN = 24V) 75 4 12 2 70 0 10 3 6 9 12 15 18 30 40 50 60 70 80 Load Current (Amps) Ambient Temperature ( C) ° UCH-5/30-D48 Maximum Current Temperature Derating (at sea level) UCH-5/30-D48 Efficiency and Power Dissipation No baseplate, VIN = 48V, transverse airflow vs Line Voltage and Load Current @25˚C 30 95 20 26 90 16 VIN = 75V 22 85 12 VIN = 48V 80 8 18 VIN = 36V Power Dissipation (VIN = 48V) 100 lfm 200 lfm 300 lfm 400 lfm 75 4 14 70 0 10 3 6 9 12 15 18 21 24 27 30 30 40 50 60 70 80 Load Current (Amps) Ambient Temperature ( C) ° UCH-12/4.2-D48 Maximum Current Temperature Derating at sea level UCH-12/4.2-D48 Efficiency and Power Dissipation (VIN = 48V, airflow direction from VIN to VOUT, no baseplate) vs Line Voltage and Load Current @25˚C 4.5 93 14 91 13 4 89 12 3.5 Natural Convection 87 11 85 10 3 83 9 81 8 2.5 79 7 2 77 6 VIN = 36V VIN = 48V VIN = 75V 75 5 1.5 73 4 Power Dissipation 71 3 1 (VIN = 48V) 69 2 0.5 67 1 65 0 0 0.42 0.84 1.26 1.68 2.1 2.52 2.94 3.36 3.78 4.2 30 40 50 60 70 80 85 Load Current (Amps) Ambient Temperature ( C) ° www.murata-ps.com/support MDC_UCH Models.D03 Page 11 of 18 Efficiency (%) Efficiency (%) Efficiency (%) Power Dissipation (Watts) Power Dissipation (Watts) Power Dissipation (Watts) Output Current (Amps) Output Current (Amps) Output Current (Amps) Single Output UCH Models Isolated, “Half-Brick” 1.8−15V Output DC/DC Converters TYPICAL PERFORMANCE DATA UCH-12/12.5-D48 Maximum Current Temperature Derating (at sea level) UCH-12/12.5-D48 Efficiency and Power Dissipation No baseplate, VIN = 48V, transverse airflow vs Line Voltage and Load Current @25˚C 12.5 20 95 18 11.5 90 16 19.5 85 14 9.5 80 12 VIN = 36V VIN = 48V VIN = 75V 10 8.5 75 100 lfm 200 lfm 300 lfm 400 lfm Power Dissipation 8 (VIN = 48V) 7.5 70 6 4 6.5 65 3 4 5 6 7 8 9 10 11 12 30 40 50 60 70 80 Load Current (Amps) Ambient Temperature ( C) ° UCH-15/6.7-D48 Efficiency and Power Dissipation UCH-15/6.7-D48 Maximum Current Temperature Derating (at sea level) vs Line Voltage and Load Current @25˚C No baseplate, VIN = 48V, transverse airflow 100 14 7 95 12 6 10 90 5 VIN = 75V 8 85 4 VIN = 48V 6 80 3 VIN = 36V Power Dissipation 4 75 100 lfm 200 lfm 300 lfm 400 lfm 2 (VIN = 48V) 2 70 1 0 65 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 6.5 0 30 40 50 60 70 80 Load Current (Amps) Ambient Temperature ( C) ° www.murata-ps.com/support MDC_UCH Models.D03 Page 12 of 18 Efficiency (%) Efficiency (%) Power Dissipation (Watts) Power Dissipation (Watts) Output Current (Amps) Output Current (Amps) Single Output UCH Models Isolated, “Half-Brick” 1.8−15V Output DC/DC Converters MECHANICAL SPECIFICATIONS 2.30 A User’s thermal surface and hardware Do not remove (58.4) Recommended threaded insert torque M3 x 0.50 is 0.35-0.55 N-M or 3-5 in-lbs. threaded inserts Baseplate from bottom PCB 0.40 0.50 (10.2) (12.7) 0.015 min. clearance 0.015 minimum Pin Diameters: between standoffs and 0.18 clearance between Pins 1-4, 6-8 0.040 ± 0.001 (1.016 ±0.025) 0.18 highest component (4.6) standoffs and (4.6) Pins 5, 9 0.080 ± 0.001 (2.032 ±0.025) highest component 1.900 0.20 A (48.26) (5.1) 2.30 (58.4) 1.90 (48.3) B 1 9 M3 x 0.50 threaded insert and standoff (4 places) 2 8 Case C61 Screw length must 2.00 2.40 7 1.400 2.40 not go through Baseplate (50.8) (61.0) (35.56) (60.96) 1.000 (25.40) 3 6 0.700 (17.78) 0.400 (10.16) 4 5 0.50 UCH with Optional Baseplate (12.70) Bottom View B Standard pin length is shown. Please refer to the Part Number Structure for special order pin lengths. Dimensions are in inches (mm) shown for ref. only. INPUT/OUTPUT CONNECTIONS Pin Function P17 Third Angle Projection 1 −Input 2 Case 3 On/Off Control 4 +Input 5 +Output Tolerances (unless otherwise specified): 6 +Sense .XX ± 0.02 (0.5) 7 Trim .XXX ± 0.010 (0.25) Angles ± 2˚ 8 −Sense 9 −Output Components are shown for reference only. Pin 2 may be removed under special order. The case pin 2 is normally only used in combination with the baseplate. Please contact Murata Power Solutions. www.murata-ps.com/support MDC_UCH Models.D03 Page 13 of 18 Single Output UCH Models Isolated, “Half-Brick” 1.8−15V Output DC/DC Converters TECHNICAL NOTES Input Source Impedance These converters will operate to specifications without external components, Input Fusing assuming that the source voltage has very low impedance and reasonable in- Certain applications and/or safety agencies may require fuses at the inputs of put voltage regulation. Since real-world voltage sources have finite impedance, power conversion components. Fuses should also be used when there is the performance is improved by adding external filter components. Sometimes only possibility of sustained input voltage reversal which is not current-limited. For a small ceramic capacitor is sufficient. Since it is difficult to totally characterize greatest safety, we recommend a fast blow fuse installed in the ungrounded all applications, some experimentation may be needed. Note that external input input supply line. capacitors must accept high speed switching currents. The installer must observe all relevant safety standards and regulations. For Because of the switching nature of DC/DC converters, the input of these safety agency approvals, install the converter in compliance with the end-user converters must be driven from a source with both low AC impedance and safety standard, i.e. IEC/EN/UL 60950-1. adequate DC input regulation. Performance will degrade with increasing input Input Reverse-Polarity Protection inductance. Excessive input inductance may inhibit operation. The DC input regulation specifies that the input voltage, once operating, must never degrade If the input voltage polarity is reversed, an internal body diode will become below the Shut-Down Threshold under all load conditions. Be sure to use forward biased and likely draw excessive current from the power source. If this adequate trace sizes and mount components close to the converter. source is not current-limited or the circuit appropriately fused, it could cause permanent damage to the converter. Please be sure to install a properly- I/O Filtering, Input Ripple Current and Output Noise rated external input fuse (see Specifications). All models in this converter series are tested and specified for input reflected Input Under-Voltage Shutdown and Start-Up Threshold ripple current and output noise using designated external input/output compo- nents, circuits and layout as shown in the figures below. External input capaci- Under normal start-up conditions, converters will not begin to regulate properly tors (Cin in the figure) serve primarily as energy storage elements, minimizing until the ramping-up input voltage exceeds and remains at the Start-Up line voltage variations caused by transient IR drops in the input conductors. Threshold Voltage (see Specifications). Once operating, converters will not Users should select input capacitors for bulk capacitance (at appropriate turn off until the input voltage drops below the Under-Voltage Shutdown Limit. frequencies), low ESR and high RMS ripple current ratings. In the figure below, Subsequent restart will not occur until the input voltage rises again above the the Cbus and Lbus components simulate a typical DC voltage bus. Your specific Start-Up Threshold. This built-in hysteresis prevents any unstable on/off opera- system configuration may require additional considerations. Please note that tion at a single input voltage. the values of Cin, Lbus and Cbus will vary according to the specific converter Users should be aware however of input sources near the Under-Voltage model. Shutdown whose voltage decays as input current is consumed (such as ca- TO pacitor inputs), the converter shuts off and then restarts as the external capaci- CURRENT OSCILLOSCOPE tor recharges. Such situations could oscillate. To prevent this, make sure the PROBE +VIN operating input voltage is well above the UV Shutdown voltage AT ALL TIMES. LBUS + Start-Up Time – VIN CBUS CIN 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 the ramping input voltage crosses the Start-Up Threshold and the fully loaded −VIN regulated output voltage enters and remains within its specified accuracy band. CIN = 33µF, ESR < 700mΩ @ 100kHz Actual measured times will vary with input source impedance, external input CBUS = 220µF, ESR < 100mΩ @ 100kHz capacitance, input voltage slew rate and final value of the input voltage as it LBUS = 12µH appears at the converter. Figure 2. Measuring Input Ripple Current These converters include a soft start circuit to moderate the duty cycle of its In critical applications, output ripple and noise (also referred to as periodic PWM controller at power up, thereby limiting the input inrush current. and random deviations or PARD) may be reduced by adding filter elements such as multiple external capacitors. Be sure to calculate component tempera- The On/Off Remote Control interval from On command to Vout regulated ture rise from reflected AC current dissipated inside capacitor ESR. 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 In the figure, the two copper strips simulate real-world printed circuit On command until the output enters and remains within its specified accuracy impedances between the power supply and its load. In order to minimize circuit band. The specification assumes that the output is fully loaded at maximum errors and standardize tests between units, scope measurements should be rated current. Similar conditions apply to the On to Vout regulated specification made using BNC connectors or the probe ground should not exceed one half such as external load capacitance and soft start circuitry. inch and soldered directly to the fixture. www.murata-ps.com/support MDC_UCH Models.D03 Page 14 of 18 Single Output UCH Models Isolated, “Half-Brick” 1.8−15V Output DC/DC Converters Note that the temperatures are of the ambient airflow, not the converter itself which is obviously running at higher temperature than the outside air. +SENSE Also note that very low flow rates (below about 25 LFM) are similar to “natural convection,” that is, not using fan-forced airflow. +VOUT Murata Power Solutions makes Characterization measurements in a closed RLOAD SCOPE C1 C2 cycle wind tunnel with calibrated airflow. We use both thermocouples and an infrared camera system to observe thermal performance. As a practical matter, it is quite difficult to insert an anemometer to precisely measure airflow in −VOUT most applications. Sometimes it is possible to estimate the effective airflow if −SENSE you thoroughly understand the enclosure geometry, entry/exit orifice areas and the fan flowrate specifications. C1 = 1µF CAUTION: If you routinely or accidentally exceed these Derating guidelines, C2 = 10µF the converter may have an unplanned Over Temperature shut down. Also, these LOAD 2-3 INCHES (51-76mm) FROM MODULE graphs are all collected at slightly above Sea Level altitude. Be sure to reduce Figure 3. Measuring Output Ripple and Noise (PARD) the derating for higher density altitude. Floating Outputs Output Overvoltage Protection Since these are isolated DC/DC converters, their outputs are “floating” with 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. It safely tests full current rated output voltage without damaging the converter. Minimum Output Loading Requirements All models regulate within specification and are stable under no load to full Output Fusing load conditions. Operation under no load might however slightly increase The converter is extensively protected against current, voltage and temperature output ripple and noise. extremes. However your output application circuit may need additional protec- tion. In the extremely unlikely event of output circuit failure, excessive voltage Thermal Shutdown could be applied to your circuit. Consider using an appropriate fuse in series To prevent many over temperature problems and damage, these converters with the output. include thermal shutdown circuitry. If environmental conditions cause the temperature of the DC/DC’s to rise above the Operating Temperature Range Output Current Limiting up to the shutdown temperature, an on-board electronic temperature sensor As soon as the output current increases to approximately 125% to 150% of will power down the unit. When the temperature decreases below the turn-on its maximum rated value, the DC/DC converter will enter a current-limiting threshold, the converter will automatically restart. There is a small amount of mode. The output voltage will decrease proportionally with increases in output hysteresis to prevent rapid on/off cycling. The temperature sensor is typically current, thereby maintaining a somewhat constant power output. This is also located adjacent to the switching controller, approximately in the center of the commonly referred to as power limiting. unit. See the Performance and Functional Specifications. Current limiting inception is defined as the point at which full power falls CAUTION: If you operate too close to the thermal limits, the converter may below the rated tolerance. See the Performance/Functional Specifications. shut down suddenly without warning. Be sure to thoroughly test your applica- Note particularly that the output current may briefly rise above its rated value tion to avoid unplanned thermal shutdown. in normal operation as long as the average output power is not exceeded. This enhances reliability and continued operation of your application. If the output Temperature Derating Curves current is too high, the converter will enter the short circuit condition. The graphs in this data sheet illustrate typical operation under a variety of conditions. The Derating curves show the maximum continuous ambient air Output Short Circuit Condition temperature and decreasing maximum output current which is acceptable When a converter is in current-limit mode, the output voltage will drop as the under increasing forced airflow measured in Linear Feet per Minute (“LFM”). output current demand increases. If the output voltage drops too low (ap- Note that these are AVERAGE measurements. The converter will accept brief proximately 98% of nominal output voltage for most models), the magnetically increases in current or reduced airflow as long as the average is not exceeded. www.murata-ps.com/support MDC_UCH Models.D03 Page 15 of 18 Single Output UCH Models Isolated, “Half-Brick” 1.8−15V Output DC/DC Converters coupled voltage used to develop primary side voltages will also drop, thereby Contact and PCB resistance losses due to IR drops shutting down the PWM controller. Following a time-out period, the PWM will 5 restart, causing the output voltage to begin ramping up to its appropriate value. 1 +VOUT −VIN If the short-circuit condition persists, another shutdown cycle will initiate. This I OUT 6 rapid on/off cycling is called “hiccup mode”. The hiccup cycling reduces the +SENSE average output current, thereby preventing excessive internal temperatures Sense Current and/or component damage. A short circuit can be tolerated indefinitely. 7 ON/OFF 3 TRIM LOAD The “hiccup” system differs from older latching short circuit systems CONTROL Sense Return because you do not have to power down the converter to make it restart. The 8 −SENSE system will automatically restore operation as soon as the short circuit condi- tion is removed. I OUT Return 4 9 +VIN -VOUT Remote Sense Input Contact and PCB resistance Use the Sense inputs with caution. Sense is normally connected at the load. losses due to IR drops Sense inputs compensate for output voltage inaccuracy delivered at the load. This is done by correcting IR voltage drops along the output wiring and the Figure 4. Remote Sense Circuit Configuration current carrying capacity of PC board etch. This output drop (the difference be- Trimming the Output Voltage tween Sense and Vout when measured at the converter) should not be allowed The Trim input to the converter allows the user to adjust the output voltage to exceed 0.5V. Consider using heavier wire if this drop is excessive. Sense over the rated trim range (please refer to the Specifications). In the trim equa- inputs also improve the stability of the converter and load system by optimizing tions and circuit diagrams that follow, trim adjustments use either a trimpot or the control loop phase margin. a single fixed resistor connected between the Trim input and either the +Sense or –Sense terminals. (On some converters, an external user-supplied precision Note: The Sense input and power Vout lines are internally connected through DC voltage may also be used for trimming). Trimming resistors should have a low value resistors to their respective polarities so that the converter can low temperature coefficient (±100 ppm/deg.C or less) and be mounted close operate without external connection to the Sense. Nevertheless, if the Sense to the converter. Keep leads short. If the trim function is not used, leave the function is not used for remote regulation, the user should connect +Sense to trim unconnected. With no trim, the converter will exhibit its specified output +Vout and –Sense to –Vout at the converter pins. voltage accuracy. The remote Sense lines carry very little current. They are also capacitively There are two CAUTIONs to be aware of for the Trim input: coupled to the output lines and therefore are in the feedback control loop to regulate and stabilize the output. As such, they are not low impedance inputs CAUTION: To avoid unplanned power down cycles, do not exceed EITHER and must be treated with care in PC board layouts. Sense lines on the PCB the maximum output voltage OR the maximum output power when setting the should run adjacent to DC signals, preferably Ground. In cables and discrete trim. Be particularly careful with a trimpot. If the output voltage is excessive, wiring, use twisted pair, shielded tubing or similar techniques. the OVP circuit may inadvertantly shut down the converter. If the maximum power is exceeded, the converter may enter current limiting. If the power is Any long, distributed wiring and/or significant inductance introduced into the exceeded for an extended period, the converter may overheat and encounter Sense control loop can adversely affect overall system stability. If in doubt, test overtemperature shut down. your applications by observing the converter’s output transient response dur- ing step loads. There should not be any appreciable ringing or oscillation. You CAUTION: Be careful of external electrical noise. The Trim input is a senstive may also adjust the output trim slightly to compensate for voltage loss in any input to the converter’s feedback control loop. Excessive electrical noise may external filter elements. Do not exceed maximum power ratings. cause instability or oscillation. Keep external connections short to the Trim input. Use shielding if needed. Please observe Sense inputs tolerance to avoid improper operation: [Vout(+) −Vout(-)] − [Sense(+) −Sense(-)] ≤ 10% of Vout Output overvoltage protection is monitored at the output voltage pin, not the 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 insure: (Vout at pins) x (Iout) ≤ (Max. rated output power) www.murata-ps.com/support MDC_UCH Models.D03 Page 16 of 18 Single Output UCH Models Isolated, “Half-Brick” 1.8−15V Output DC/DC Converters Trim Equations Trim Equations Trim Down Trim Up Connect trim resistor between Connect trim resistor between trim pin and −Sense trim pin and +Sense 1 VNOMINAL × (1 + ∆) 1 R (kΩ) = R (kΩ) = − 2 − − 2 TrimUp TrimDn ∆ ∆ 1.225 × ∆ Where, Where, ∆ = VNOMINAL − VOUT ∆ = VOUT − VNOMINAL VNOMINAL VNOMINAL 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. Trim Circuits +OUT +IN +SENSE TRIM LOAD ON/OFF –SENSE –IN –OUT Figure 5. Trim Connections Using A Trimpot +OUT +OUT +IN +IN +SENSE +SENSE RTRIM DOWN TRIM LOAD TRIM LOAD ON/OFF ON/OFF RTRIM UP –SENSE –SENSE –IN –IN –OUT –OUT Figure 6. Trim Connections to Increase Output Voltages Figure 7. Trim Connections to Decrease Output Voltages www.murata-ps.com/support MDC_UCH Models.D03 Page 17 of 18 Single Output UCH Models Isolated, “Half-Brick” 1.8−15V Output DC/DC Converters Remote On/Off Control CAUTION: Do not apply voltages to the On/Off pin when there is no input power voltage. Otherwise the converter may be permanently damaged. On the input side, a remote On/Off Control can be ordered with either logic type. Output Capacitive Load Positive: Standard models are enabled when the On/Off pin is left open or These converters do not require external capacitance added to achieve rated is pulled high to +Vin with respect to –Vin. An internal bias current causes the specifications. Users should only consider adding capacitance to reduce switch- open pin to rise to approximately +15V. Some models will also turn on at lower ing noise and/or to handle spike current step loads. Install only enough ca- intermediate voltages (see Specifications). Positive-logic devices are disabled pacitance to achieve noise objectives. Excess external capacitance may cause when the On/Off is grounded or brought to within a low voltage (see Specifica- regulation problems, slower transient response and possible instability. Proper tions) with respect to –Vin. wiring of the Sense inputs will improve these factors under capacitive load. Negative: Optional negative-logic devices are on (enabled) when the On/Off The maximum rated output capacitance and ESR specification is given for a is grounded or brought to within a low voltage (see Specifications) with respect capacitor installed immediately adjacent to the converter. Any extended output to –Vin. The device is off (disabled) when the On/Off is left open or is pulled wiring or smaller wire gauge or less ground plane may tolerate somewhat high- high to approximately +15V with respect to –Vin. er capacitance. Also, capacitors with higher ESR may use a larger capacitance. Dynamic control of the On/Off function should be able to sink appropriate Product Adaptations signal current when brought low and withstand appropriate voltage when Murata Power Solutions offers several variations of our core product family. brought high. Be aware too that there is a finite time in milliseconds (see These products are available under scheduled quantity orders and may also Specifications) between the time of On/Off Control activation and stable, include separate manufacturing documentation from a mutually-agreeable regulated output. This time will vary slightly with output load type and current Product Specification. Since these product adaptations largely share a common and input conditions. parts list, similar specifications and test methods with their root products, they are provided at excellent costs and delivery. Please contact MPS for details. There are several CAUTIONs for the On/Off Control: As of this date, the following products are available: CAUTION: While it is possible to control the On/Off with external logic if you carefully observe the voltage levels, the preferred circuit is either an open UCH-3.3/30-D48NBHL2-Y drain/open collector transistor, a switch or a relay (which can thereupon be UCH-5/10-D48NBHL2-Y controlled by logic) returned to negative Vin. UCH-3.3/15-D48NBHL2-Y UCH-3.3/35-D24NBHL2-Y These are all negative On/Off logic, baseplate installed, conformal coating added, 3.68mm pin length, and RoHS-5 hazardous substance compliance (with lead). This product is subject to the following operating requirements Murata Power Solutions, Inc. and the Life and Safety Critical Application Sales Policy: 11 Cabot Boulevard, Mansfield, MA 02048-1151 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. © 2017 Murata Power Solutions, Inc. www.murata-ps.com/support MDC_UCH Models.D03 Page 18 of 18