UHE Series www.murata-ps.com Isolated, High Efficiency, 1.6" × 2" 2-10 Amp, 12-30 Watt DC/DC Converters Typical units Housed in smaller, 1.6" x 2" x 0.40" (41 x 51 x 10.2mm) packages carrying the standard 2" x 2" pinout, MPS’s new UHE Series DC/DC Converters deliver more current/power (up to 10A/30W) than currently available from either package size. FEATURES PRODUCT OVERVIEW n The most IOUT/POUT in this format The UHE 12-30W Series of high-efficiency, All devices feature full I/O fault protection isolated DC/DC’s provide output power ranging including: input overvoltage and undervoltage n Lower priced than bricks from 10 Amps @ 1.2V to 2 Amps @ 15V. Offering shutdown, precise output overvoltage protection n Small 1.6" x 2" x 0.4" plastic package both 2:1 and 4:1 input voltage ranges, UHE’s meet (a rarity on low-voltage outputs), output current with standard 2" x 2" pinout Vin requirements from 9 to 75 Volts. limiting, short-circuit protection, and thermal n Output configurations: Taking full advantage of the synchronous- shutdown. 1.2/1.5/1.8/2.5VOUT @ 10 Amps rectifier, forward topology, UHEs boast outstanding All UHE models incorporate a Vout Trim function 3.3/5VOUT @ 25 Watts efficiency (some models exceed 91%) enabling and an On/Off Control pin (positive or negative 5/12/15VOUT @ 30 Watts full-power operation to ambient temperatures as logic). Low-voltage models (1.2V to 5V) offer n Five input ranges from 9-75 Volts high as +60°C, without air flow. Assembled using optional sense pins facilitating either remote load fully automated, SMT-on-pcb techniques, UHEs regulation or current sharing for true N+1 redun- n Efficiencies as high as 91.5% provide stable no-load operation, excellent line dancy. All models are certified to the BASIC insula- n Stable no-load operation (±0.1%) and load (±0.15%) regulation, quick step tion requirements of UL/EN60950-1 (2nd Edition), n Optional Sense pins for low VOUT response (200µsec), and low output ripple/noise and 48Vin (75V max.) models carry the CE mark. (50-100mVp-p). Additionally, the UHEs unique Selected models are RoHS compliant (Reduction n Thermal shutdown, I/O protected output design eliminates one of the topology’s few of Hazardous Substances). n 1500 Vdc I/O BASIC Insulation shortcomings–output reverse conduction. n UL/EN60950-1 certified (2nd Edition); CE marked for Q48 models n RoHS compliant +INPUT +OUTPUT (1) (6) SWITCH +SENSE CONTROL (5) –OUTPUT (7) THERMAL OPTO –SENSE –INPUT SHUTDOWN ISOLATION (8) (2) OVERVOLTAGE COMPARATOR PWM OPTO REFERENCE & CONTROLLER ISOLATION ERROR AMP VOUT TRIM UVLO & OVLO (9) COMPARATORS ON/OFF CONTROL (4) Typical topology is shown. Optional comparator feedback. Contact MPS.  Sense pins are optional on 1.2-5VOUT models ("R" suffix). * One phase of two is shown. For full details go to www.murata-ps.com/rohs Figure 1. Simplified Block Diagram www.murata-ps.com/support MDC_UHE_12-30W Series.D05 Page 1 of 16

UHE Series Isolated, High Efficiency, 1.6" × 2" 2-10 Amp, 12-30 Watt DC/DC Converters PERFORMANCE SPECIFICATIONS SUMMARY AND ORDERING GUIDE ➀ Output Input Model Family Package (See model numbering VOUT IOUT R/N (mVp-p)➁ Regulation (Max.) VIN Nom. Range Iin ➂ Efficiency (Case/ on page 3) (Volts) (Amps) Typ. Max. Line Load ➃ (Volts) (Volts) (mA/A) Min. Typ. Pinout) UHE-1.2/10000-D12-C 1.2 10 80 120 ±0.1% ±0.36/0.9% 12 9-18 75/1.2 81% 83.5% C32, P51/52 UHE-1.2/10000-D24-C 1.2 10 80 120 ±0.1% ±0.25/0.9% 24 18-36 35/0.6 82.2% 83% C32, P51/52 UHE-1.2/10000-D48-C 1.2 10 80 120 ±0.1% ±0.3/0.625% 48 36-75 35/0.31 81% 83% C32, P51/52 UHE-1.5/10000-D24-C 1.5 10 55 80 ±0.1% ±0.15/0.625% 24 18-36 35/0.73 84% 85.5% C32, P51/52 UHE-1.5/10000-D48-C 1.5 10 55 80 ±0.1% ±0.15/0.625% 48 36-75 35/0.38 82.5% 84% C32, P51/52 UHE-1.8/10000-D24-C 1.8 10 70 90 ±0.1% ±0.15/0.625% 24 18-36 35/0.86 85.5% 87% C32, P51/52 UHE-1.8/10000-D48-C 1.8 10 50 75 ±0.1% ±0.15/0.625% 48 36-75 35/0.44 83.5% 85% C32, P51/52 UHE-2.5/10000-D24-C 2.5 10 50 100 ±0.075% ±0.15/0.5% 24 18-36 35/1.23 87.7% 88.7% C32, P51/52 UHE-2.5/10000-D48-C 2.5 10 65 120 ±0.1% ±0.15/0.5% 48 36-75 35/0.59 87% 88.5% C32, P51/52 UHE-3.3/7500-Q12-C 3.3 7.5 70 90 ±0.25% ±0.2/0.5% 24 9-36 50/1.17 85% 88% C32, P51/52 UHE-3.3/7500-Q48-C 3.3 7.5 90 125 ±0.35% ±0.5% 48 18-75 38/0.57 88% 90% C32, P51/52 UHE-3.3/7500-D48-C 3.3 7.5 80 100 ±0.2% ±0.5% 48 36-75 35/0.6 86.7% 88.7% C32, P51/52 UHE-3.3/7500-D48T-C 3.3 7.5 80 100 ±0.2% ±0.5% 48 36-75 35/0.58 85.5% 88.2% C32, P51 UHE-5/5000-Q12-C 5 5 50 70 ±0.1% ±0.15/0.3% 24 9-36 50/1.2 86% 87.5% C32, P51/52 UHE-5/5000-Q48-C 5 5 60 90 ±0.05% ±0.15/0.3% 48 18-75 38/0.58 87.5% 90% C32, P51/52 UHE-5/6000-Q12-C 5 6 50 70 ±0.1% ±0.3% 24 9-36 50/1.44 86.5% 87% C32, P51/52 UHE-5/6000-D48-C 5 6 80 100 ±0.2% ±0.25/0.5% 48 36-75 45/0.7 87.5% 89% C32, P51/52 UHE-5/6000-D48T-C 5 6 65 100 ±0.2% ±0.5% 48 36-75 45/0.7 87.5% 91% C32, P51 UHE-5/6000-Q48T-C 5 6 55 80 ±0.08% ±0.15% 48 18-75 38/0.69 88.5% 90% C32, P51 UHE-12/2500-Q12-C 12 2.5 125 165 ±0.1% ±0.5% 24 9-36 55/1.43 85.5% 87.5% C32, P51 UHE-12/2500-D12-C 12 2.5 65 100 ±0.2% ±0.3% 12 9-18 90/2.81 87% 89% C32, P51 UHE-12/2500-D24-C 12 2.5 65 100 ±0.2% ±0.3% 24 18-36 55/1.39 88% 90% C32, P51 UHE-12/2500-Q48-C 12 2.5 100 120 ±0.1% ±0.5% 48 18-75 30/0.6 88% 90% C32, P51 UHE-12/2500-D48-C 12 2.5 60 100 ±0.2% ±0.3% 48 36-75 30/0.7 90% 92% C32, P51 UHE-15/2000-D12-C 15 2 70 100 ±0.2% ±0.3% 12 9-18 110/2.81 87% 89% C32, P51 UHE-15/2000-Q12-C 15 2 70 100 ±0.05% ±0.15% 24 9-36 50/1.4 88% 89.5% C32, P51 UHE-15/2000-D24-C 15 2 70 100 ±0.2% ±0.3% 24 18-36 70/1.39 88% 90% C32, P51 UHE-15/2000-Q48-C 15 2 100 150 ±0.1% ±0.5% 48 18-75 45/0.69 88% 90% C32, P51 UHE-15/2000-D48-C 15 2 70 100 ±0.2% ±0.3% 48 36-75 35/0.7 90% 92% C32, P51 UHE-5/6000-Q48-C 5 6 55 80 ±0.08% ±0.15% 48 18-75 38/0.69 88.5% 90% C32, P51  Typical at TA = +25°C under nominal line voltage and full-load conditions, unless noted.  Devices have no minimum-load requirements and will regulate under no-load conditions.  Ripple/Noise (R/N) is tested/specified over a 20MHz bandwidth. All models are specified with Regulation specifications describe the output voltage deviation as the line voltage or load an external 0.47µF multi-layer ceramic capacitor installed across their output pins. (with/without sense option) is varied from its nominal/midpoint value to either extreme.  Nominal line voltage, no-load/full-load conditions. UHE-3.3/7500-D48 UHE-3.3/7500-Q12R UHE-5/5000-Q48NR UHE-5/6000-D48-Y-CIS UHE-12/2500-Q48N UHE-3.3/7500-D48N UHE-3.3/7500-Q12R-C UHE-5/5000-Q48NR-C UHE-5/6000-Q12N UHE-12/2500-Q48N-C UHE-3.3/7500-D48N-31016 UHE-3.3/7500-Q48 UHE-5/5000-Q48R UHE-5/6000-Q12N-C UHE-12/2500-Q48-Y UHE-3.3/7500-D48N-C UHE-3.3/7500-Q48N UHE-5/5000-Q48R-C UHE-5/6000-Q48T-C UHE-15/2000-D12 UHE-3.3/7500-D48NR-C UHE-3.3/7500-Q48N-C UHE-5/6000-D48N-30749-Y UHE-12/2500-D12 UHE-15/2000-D12N UHE-3.3/7500-D48R-C UHE-3.3/7500-Q48NR-C UHE-5/6000-D48N-C UHE-12/2500-D12N UHE-15/2000-D12N-C UHE-3.3/7500-D48T UHE-3.3/7500-Q48R-C UHE-5/6000-D48NR UHE-12/2500-D12N-C UHE-15/2000-D24 UHE-3.3/7500-D48T-31137-Y UHE-5/5000-Q12 UHE-5/6000-D48NR-C UHE-12/2500-D24 UHE-15/2000-D24N UHE-3.3/7500-D48T-C UHE-5/5000-Q12N UHE-5/6000-D48R UHE-12/2500-D24N UHE-15/2000-D24N-C UHE-3.3/7500-D48THL2-C UHE-5/5000-Q12N-C UHE-5/6000-D48R-C UHE-12/2500-D24N-C UHE-15/2000-D48 UHE-3.3/7500-D48THL2-C-HW UHE-5/5000-Q12NR UHE-5/6000-D48T-31136-C UHE-12/2500-D48 UHE-15/2000-D48N UHE-3.3/7500-D48THL2-Y UHE-5/5000-Q12NR-C UHE-5/6000-D48T-31136-Y UHE-12/2500-D48N UHE-15/2000-D48N-C UHE-3.3/7500-Q12 UHE-5/5000-Q12R UHE-5/6000-D48T-C UHE-12/2500-D48N-C UHE-15/2000-Q12 UHE-3.3/7500-Q12N UHE-5/5000-Q12R-C UHE-5/6000-D48THL2-C UHE-12/2500-Q12 UHE-15/2000-Q12N UHE-3.3/7500-Q12N-C UHE-5/5000-Q48 UHE-5/6000-D48THL2-C-HW UHE-12/2500-Q12N UHE-15/2000-Q48 UHE-3.3/7500-Q12NR UHE-5/5000-Q48N UHE-5/6000-D48THL2-Y UHE-12/2500-Q12N-C UHE-15/2000-Q48N UHE-3.3/7500-Q12NR-C UHE-5/5000-Q48N-C UHE-5/6000-D48-Y UHE-12/2500-Q48 UHE-15/2000-Q48N-C www.murata-ps.com/support MDC_UHE_12-30W Series.D05 Page 2 of 16

UHE Series Isolated, High Efficiency, 1.6" × 2" 2-10 Amp, 12-30 Watt DC/DC Converters PART NUMBER STRUCTURE U HE - 3.3 / 7500 - D48 N - C RoHS-6 hazardous substance compliant Output Configuration: (Does not claim EU exemption 7b, lead in solder) U = Unipolar On/Off Logic Blank = Positive logic, standard N = Negative logic } R = See Below optional, special order High Efficiency NR = See Below Note: Some model number Nominal Output Voltage: Input Voltage Range: combinations may not be available. 1.2, 1.5, 1.8, 2.5, 3.3, 5, 12 or 15 D12 = 9-18 Volts Contact Murata Power Solutions. D24 = 18-36 Volts Maximum Rated Output D48 = 36-75 Volts Current in mA Q12 = 9-36 Volts Q48 = 18-75 Volts Options and Adaptations Alternate pin lengths are available under special order Optional Functions and Part Number Suffixes T Alternate trim configuration. Special order only. The versatile UHE, 12-30W DC/DC converters offer numerous electrical and -C Full RoHS-6 compliance. mechanical options. Per the Ordering Guide on page 2, the trailing DXX or QXX (where XX stands for 12, 24 or 48Vin) in each part number pertains to the base -Y RoHS-5 hazardous substance compliance with lead exception. RoHS-5 part number. Part-number suffixes are added after this input identification, compliance requires a scheduled quantity order. Not all RoHS-5 “-Y” indicating the selection of standard options. The resulting part number is a models are available. Please contact Product Marketing for further "standard product" and is available to any customer desiring that particular information. combination of options. Adaptations The On/Off Control function on pin 4 employs a positive logic (on = open or There are various additional configurations available on UHE, 12-30W DC/DCs. "high," no suffix). To request a negative logic on this pin/function, add an "N" Because designating each of them with a standard part-number suffix is not suffix to the part number. Standard models have no pins in the pins 5 and 8 always feasible, such are designated by MPS in assigning a 5-digit “adaptation positions. For 5-10A models (1.2-5Vout), ±Sense pin/functions can be added to code” after the part-number suffixes. Contact MPS directly if you are interested these positions (see pinout P52) by adding an "R" suffix. An "NR" suffix can be in your own set of options/adaptations. Our policy for minimum order quantities added for both negative-logic and sense-pin options. See below. may apply. Consequently, the following products are offered for sale: Suffix Description UHE-5/6000-D48N-30749 Blank Positive logic On/Off Control function (pin 4), Vout trim (pin 9), UHE-5/6000-D48N-30749-Y (RoHS-5) no Sense pins, pin length 0.2 inches (5.08 mm). Standard product, 48Vin, 5V/6A output with negative logic on the On/Off Control N Add Negative logic on the On/Off Control function, VOUT trim (pin 9), function, modified Trim function (5% trim up = 9.09kΩ, 5% trim down = no Sense pins. 3.83kΩ, compatible with UEP-30750), integrated soft start and with input OVP and thermal shutdown removed. R Positive logic on the On/Off Control function, Vout trim (pin 9), ±Sense pins in the pin 5 and pin 8 positions (available for low Vout models RoHS-5 compliance refers to the exclusion of the six hazardous substances only). Available under special order. in the RoHS specification with the excepion of lead. MPS’s RoHS-5 products use all the conforming RoHS materials, however our solders contain lead. NR Negative logic on the On/Off Control function, Vout trim (pin 9), +/– Sense pins in the pin 5 and pin 8 positions (available for low Vout UHE-3.3/7500-D48THL2-Y and models only). Available under special order. UHE-5/6000-D48THL2-Y (RoHS-5) Special trim, conformal coating, 3.68mm pin length, positive on/off logic, RoHS-5 hazardous substance compliance (with lead). www.murata-ps.com/support MDC_UHE_12-30W Series.D05 Page 3 of 16

UHE Series Isolated, High Efficiency, 1.6" × 2" 2-10 Amp, 12-30 Watt DC/DC Converters MECHANICAL SPECIFICATIONS INPUT/OUTPUT CONNECTIONS Dimensions are in inches (mm) shown for ref. only. Pin Function P51 Function P52 Third Angle Projection 1 +Input +Input 2 –Input –Input 3 No Pin No Pin Tolerances (unless otherwise specified): 4 On/Off Control On/Off Control .XX ± 0.02 (0.5) 5 No Pin Sense* .XXX ± 0.010 (0.25) Angles ± 2˚ 6 +Output +Output Components are shown for reference only. 7 –Output –Output 8 No Pin –Sense* 9 Trim Trim * Pins 5 and 8 are installed for optional R-suffix versions of 1.2-5VOUT models. If installed, always connect the sense pins either to a remote load or to their respective Vout pin. See page 3 for complete Part Number structure & ordering details. 2.00 (50.8) PLASTIC CASE 0.40 (10.2) STANDOFF 0.020 (0.5) 0.040 ±0.001 DIA. 0.20 MIN (1.016 ±0.025) (5.08) 1.800 0.10 (45.72) (2.54) 0.200 0.200 (5.1) (5.1) 5 6 1 0.400 1.60 (10.2) (40.6) 2 0.400 7 (10.16) 3 0.400 (10.16) 8 2 EQ. SP. @ 4 0.200 (5.08) 9 0.100 BOTTOM VIEW (2.5) 0.20 (5.1) www.murata-ps.com/support MDC_UHE_12-30W Series.D05 Page 4 of 16

UHE Series Isolated, High Efficiency, 1.6" × 2" Performance/Functional Specifications 2-10 Amp, 12-30 Watt DC/DC Converters Typical @ TA = +25°C under nominal line voltage and full-load conditions, unless noted. ➀ ➁ Input Output Input Voltage Range: Overvoltage Protection: Magnetic feedback D12 Models (start up at 10V max.) 9-18 Volts (12V nominal) 1.2V Outputs 1.5-2.1 Volts Q12 Models (start up at 10V max.) 9-36 Volts (24V nominal) 1.5V Outputs 1.8-2.4 Volts D24 Models 18-36 Volts (24V nominal) 1.8V Outputs 2.2-2.8 Volts Q48 Models 18-75 Volts (48V nominal) 2.5V Outputs 2.8 to 3.2 Volts D48 Models 36-75 Volts (48V nominal) 3.3V Outputs 4 to 4.8 Volts Overvoltage Shutdown: 5V Outputs 6.1-7.5 Volts D12 Models 18.5-23 Volts 12V Outputs 12.7-13.5 Volts Q12/D24 Models 37-42 Volts 15V Outputs 15.8-16.2 Volts D48/Q48 Models Not applicable Maximum Capacitive Loading: 10,000µF (1.2-5VOUT) Start-Up Threshold: ➁ (Low ESR capacitor) 2,000µF (12-15VOUT) D12/Q12 Models 9.4-10 Volts Dynamic Characteristics D24/Q48 Models 15.5-18 Volts Dynamic Load Response: D48 Models 33.5-36 Volts (50-100% load step to ±3% VOUT) 200µsec maximum ➇ Undervoltage Shutdown: ➁ Start-Up Time: ➇ 8msec typical D12/Q12 Models 7.0-8.8 Volts D24/Q48 Models 15-17 Volts VIN to VOUT and On/Off to VOUT 15msec maximum UHE-15/2000-Q12 30mS typ., 50mS max. D48 Models 32-35.5 Volts Switching Frequency 150-350kHz (model dependent) Input Current: Normal Operating Conditions See Ordering Guide Environmental Standby Mode (Off, OV, UV) 5mA MTBF➈ UHE-12/2500-Q12 5,885,546 hours Input Reflected Ripple Current ➂ 2.5-10mAp-p Operating Temperature (Ambient): ➉ –40 to +85°C with Derating Input Filter Type LC or Pi type (see Derating Curves) Reverse-Polarity Protection Brief duration, 5A maximum Thermal Shutdown +115°C to +130°C Remote On/Off Control (Pin 4): ➃ Storage Temperature –55 to +125°C Positive Logic (Standard) On = open, open collector, or to +15V Flammability UL 94 V-0 applied. IIN = 2.6mA max. Off = pulled low to 0-0.8V. IIN = 2mA max. Physical Negative Logic ("N" Suffix Models) On = pulled low to 0-0.8V. IIN = 6mA max. Dimensions 1.6" x 2" x 0.40" (40.64 x 50.8 x 10.16mm) Off = open, open collector or to +15V Case Material Diallyl Phthalate applied. IIN = 1mA max. Pin Material Gold-plated copper alloy Output Weight 1.51 ounces (46.9 grams) VOUT Accuracy (50% load): Primary to Secondary Insulation Level Basic Initial ±1.5% Temperatue Coefficient ±0.02% per °C Extreme(5) ±3% ➀ All models are tested and specified with a single, external, 0.47µF, multi-layer ceramic output Minimum Loading for Specification: ➁ No load capacitor and no external input capacitors, unless otherwise noted. All models will effectively regulate under no-load conditions (with perhaps a slight increase in output ripple/noise). Ripple/Noise (20MHz BW) ➀ See Ordering Guide ➁ See Technical Notes/Performance Curves for additional explanations and details. Line/Load Regulation See Ordering Guide ➂ Input Ripple Current is tested/specified over a 5-20MHz bandwidth with an external 33µF input capacitor and a simulated source impedance of 220µF and 12µH. See I/O Filtering, Input Ripple Efficiency See Ordering Guide Current and Output Noise for details. VOUT Trim Range(6) ±5% minimum (±10% for T models) ➃ The On/Off Control is designed to be driven with open-collector (or equivalent) logic or the applica- Remote Sense Compensation ➁ ±5% tion of appropriate voltages (referenced to –Input (pin 2)). Applying a voltage to the On/Off Control pin when no input voltage is applied to the converter can cause permanent damage. See Remote Isolation Voltage: On/Off Control for more details. Input-to-Output 1500Vdc minimum (BASIC) ➄ Extreme Accuracy refers to the accuracy of either trimmed or untrimmed output voltages over all normal operating ranges and combinations of input voltage, output load and temperature. Isolation Capacitance 650pF ➅ Tie the Output Trim pin (pin 9) to +Output (pin 6) for maximum trim down or to –Output (Output Isolation Resistance 100MΩ Return/Common, pin 7) for maximum trim up. See Output Trimming for detailed trim equations. Current Limit Inception (@98%VOUT): ➆ ➆ The Current-Limit-Inception point is the output current level at which the converter's power-limiting 10 Amp Models 12-15 Amps circuitry drops the output voltage 2% from its initial value. See Output Current Limiting and Short-Circuit Protection for more details. 7.5 Amp Models 8.2-11.5 Amps ➇ For Start-Up-Time specifications, output settling time is defined as the output voltage having 5/6 Amp Models 6.5-8.5 Amps reached ±1% of its final value at maximum load current. 2.5 Amp Models 2.6-4 Amps ➈ MTBF’s are calculated using TELCORDIA SR-332 Method 1 Case, ground fixed, +25°C ambient air 2.0 Amp Models 2.1-3 Amps and full-load conditions. Contact MPS for demonstrated life-test data. Short Circuit Current (Hiccup) 1.5-2.3 Amps ➉ All models are fully operational and meet all published specifications, including "cold start," at –40°C. Use only as much output filtering as needed and no more. Larger caps (especially low-ESR ceramic types) may slow transient response or degrade dynamic performance. Thoroughly test your system with all components installed. www.murata-ps.com/support MDC_UHE_12-30W Series.D05 Page 5 of 16

UHE Series Isolated, High Efficiency, 1.6" × 2" 2-10 Amp, 12-30 Watt DC/DC Converters Typical Performance Curves UHE-1.5/10000-D24 Efficiency vs. Load @ +25°C Ambient UHE-1.8/10000-D48 Efficiency vs. Load @ +25°C Ambient 90 90 85 85 80 %) 80 %) y ( y ( 75 c c n n e VIN = 18V e ci ci 70 Effi 75 Effi VIN = 36V VIN = 24V 65 VIN = 48V 70 VIN = 36V 60 VIN = 75V 65 55 1 2 3 4 5 6 7 8 9 10 1 2 3 4 5 6 7 8 9 10 Output Current (Amps) Output Current (Amps) UHE-1.5/10000-D48 Efficiency vs. Load @ +25°C Ambient 85 UHE-2.5/10000-D48 Efficiency vs. Load @ +25°C Ambient 90 80 88 75 86 %) ciency ( 70 VIN = 36V %ency () 84 Effi 65 VIN = 48V Effici 82 VIN = 36V 80 VIN = 48V 60 VIN = 75V 78 VIN = 75V 55 1 2 3 4 5 6 7 8 9 10 76 1 2.8 4.6 6.4 8.2 10 Output Current (Amps) Output Current (Amps) UHE-1.8/10000-D24 Efficiency vs. Load @ +25°C Ambient UHE-3.3/7500-Q12 Efficiency vs. Load @ +25°C Ambient 90 95 85 90 %cy () 80 %y () 85 en nc 80 Effici 75 VIN = 2V4INV = 18V Efficie 75 VIN = 9V VIN = 24V 70 VIN = 36V 70 VIN = 36V 65 1 2 3 4 5 6 7 8 9 10 65 0.75 1.5 2.25 3 3.75 4.5 5.25 6 6.75 7.5 Output Current (Amps) Output Current (Amps) www.murata-ps.com/support MDC_UHE_12-30W Series.D05 Page 6 of 16

UHE Series Isolated, High Efficiency, 1.6" × 2" 2-10 Amp, 12-30 Watt DC/DC Converters Typical Performance Curves UHE-3.3/7500-Q48 Efficiency vs. Load @ +25°C Ambient UHE-5/5000-Q48 Efficiency vs. Load @ +25°C Ambient 100 100 90 90 80 80 %) %) y ( y ( nc 70 nc 70 e e Effici VIN = 18V Effici VIN = 18V 60 VIN = 36V 60 VIN = 36V VIN = 48V VIN = 48V 50 50 VIN = 75V VIN = 75V 40 40 0.75 1.5 2.25 3 3.75 4.5 5.25 6 6.75 7.5 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 Output Current (Amps) Output Current (Amps) UHE-3.3/7500-D48 Efficiency vs. Load @ +25°C Ambient UHE-5/6000-D48 Efficiency vs. Load @ +25°C Ambient 100 100 90 90 80 80 %) %) Efficiency ( 7600 VIN = 36V Efficiency ( 7600 VIN = 36V VIN = 48V VIN = 48V 50 50 VIN = 75V VIN = 75V 40 40 0.75 1.5 2.25 3 3.75 4.5 5.25 6 6.75 7.5 0.6 1.2 1.8 2.4 3 3.6 4.2 4.8 5.4 6 Output Current (Amps) Output Current (Amps) UHE-5/5000-Q12 Efficiency vs. Load @ +25°C Ambient UHE-5/6000-Q12 Efficiency vs. Load @ +25°C Ambient 95 93 90 89 85 85 %) %) Efficiency ( 8705 VIN = 9V Efficiency ( 7871 VIN = 1V2IVN = 9V 73 VIN = 24V VIN = 24V 70 69 VIN = 36V VIN = 36V 65 65 0.5 1.0 1.5 2 2.5 3 3.5 4 4.5 5 0.49 0.99 1.49 1.99 2.49 3.00 3.50 4.00 4.50 5.00 5.50 6.00 Output Current (Amps) Output Current (Amps) www.murata-ps.com/support MDC_UHE_12-30W Series.D05 Page 7 of 16

UHE Series Isolated, High Efficiency, 1.6" × 2" 2-10 Amp, 12-30 Watt DC/DC Converters Typical Performance Curves UHE-12/2500-D12 Efficiency vs. Load @ +25°C Ambient UHE-15/2000-D12 Efficiency vs. Load @ +25°C Ambient 95 95 90 90 85 85 %) %) Efficiency ( 8705 VIN = 9V Efficiency ( 8705 VIN = 9V VIN = 12V VIN = 12V 70 70 VIN = 18V VIN = 18V 65 65 0.25 0.5 0.75 1 1.25 1.5 1.75 2 2.25 2.5 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 Output Current (Amps) Output Current (Amps) UHE-12/2500-D24 Efficiency vs. Load @ +25°C Ambient UHE-15/2000-D24 Efficiency vs. Load @ +25°C Ambient 95 95 90 90 85 85 %) %) y ( y ( nc 80 nc 80 e e ci ci Effi VIN = 18V Effi VIN = 18V 75 75 VIN = 24V VIN = 24V 70 70 VIN = 36V VIN = 36V 65 65 0.25 0.5 0.75 1 1.25 1.5 1.75 2 2.25 2.5 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 Output Current (Amps) Output Current (Amps) UHE-12/2500-D48 Efficiency vs. Load @ +25°C Ambient UHE-15/2000-D48 Efficiency vs. Load @ +25°C Ambient 95 95 90 90 85 85 %) %) y ( y ( nc 80 nc 80 e e ci ci Effi VIN = 36V Effi VIN = 36V 75 75 VIN = 48V VIN = 48V 70 70 VIN = 75V VIN = 75V 65 65 0.25 0.5 0.75 1 1.25 1.5 1.75 2 2.25 2.5 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 Output Current (Amps) Output Current (Amps) www.murata-ps.com/support MDC_UHE_12-30W Series.D05 Page 8 of 16

UHE Series Isolated, High Efficiency, 1.6" × 2" 2-10 Amp, 12-30 Watt DC/DC Converters Typical Performance Curves UHE-12-2500-Q48 Efficiency vs. Load @ +25°C Ambient UHE-15-2000-Q48 Efficiency vs. Load @ +25°C Ambient 95 95 90 90 85 85 %) %) ncy ( 80 VIN = 18V ncy ( 80 Efficie 75 VIN = 48V Efficie 75 VIN = 18V VIN = 48V VIN = 75V 70 70 VIN = 75V 65 65 0.25 0.5 0.75 1 1.25 1.5 1.75 2 2.25 2.5 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 Output Current (Amps) Output Current (Amps) UHE-1.2/10000-D24 and UHE-1.5/10000-D24 Temperature Derating UHE-1.8/10000-D24 Temperature Derating 10 10 9 9 24VIN, STILL AIR 24VIN, STILL AIR 8 8 24VIN, 150LFM 24VIN, 150LFM s) 7 s) 7 mp 24VIN, 300LFM mp 24VIN, 300LFM nt (A 6 nt (A 6 e e urr 5 urr 5 Ci Ci ut 4 ut 4 p p ut ut O 3 O 3 2 2 1 1 0 0 –40 0 40 45 50 55 60 65 70 75 80 85 90 95 100 –40 0 40 45 50 55 60 65 70 75 80 85 90 95 100 Ambient Temperature (°C) Ambient Temperature (°C) UHE-1.2/10000-D48 and UHE-1.5/10000-D48 Temperature Derating UHE-1.8/10000-D48 Temperature Derating 10 10 9 9 48VIN, STILL AIR 75VIN, STILL AIR 8 8 48VIN, 150LFM 48VIN, STILL AIR s) 7 s) 7 mp 48VIN, 300LFM mp 75VIN, 150LFM ent (A 6 ent (A 6 48VIN, 150LFM urr 5 urr 5 Ci Ci 48VIN, 300LFM ut 4 ut 4 p p ut ut O 3 O 3 2 2 1 1 0 0 –40 0 40 45 50 55 60 65 70 75 80 85 90 95 100 –40 0 40 45 50 55 60 65 70 75 80 85 90 95 100 Ambient Temperature (°C) Ambient Temperature (°C) www.murata-ps.com/support MDC_UHE_12-30W Series.D05 Page 9 of 16

UHE Series Isolated, High Efficiency, 1.6" × 2" 2-10 Amp, 12-30 Watt DC/DC Converters Typical Performance Curves UHE-2.5/10000-D48 Temperature Derating UHE-5/5000-Q12 Temperature Derating 30 25 36VIN, STILL AIR 25 20 24VIN, STILL AIR Power (Watts) 2105 NATURAL CONVECTION Power (Watts) 15 3264VVININ, ,31 1655V00ILNLF, FM3M00LFM Output 10 Output 10 24VIN, 300LFM 5 5 0 0 –40 0 40 45 50 55 60 65 70 75 80 85 90 95 100 –40 0 40 45 50 55 60 65 70 75 80 85 90 95 100 Ambient Temperature (°C) Ambient Temperature (°C) UHE-3.3/7500-Q12 Temperature Derating UHE-3.3/7500-Q48 Maximum Current Temperature Derating 25 (VIN = 48V, airflow = 300 LFM) 8 36VIN, STILL AIR 7 20 24VIN, STILL AIR 6 Output Power (Watts) 1150 362V42VIN4I,N V31, 6I51NV,05 I3L0N0FL, 0FM3LM0F0MLFM Output Power (Watts) 345 300 LFM 2 5 1 0 0 40 50 60 70 80 90 100 –40 0 40 45 50 55 60 65 70 75 80 85 90 95 100 Ambient Temperature (°C) Ambient Temperature (°C) UHE-5/5000-Q48 Maximum Current Temperature Derating UHE-3.3/7500-D48 Temperature Derating (VIN = 48V, airflow = 300 LFM) 30 6 25 5 75VIN, STILL AIR Output Power (Watts) 211050 48VIN, STIL3L6 AV7I5IRNV, SIN7T, 51ILV5L0IN LA, FI3RM00LFM Output Power (Watts) 234 300 LFM 1 5 0 40 50 60 70 80 90 100 0 Ambient Temperature (°C) –40 0 40 45 50 55 60 65 70 75 80 85 90 95 100 Ambient Temperature (°C) www.murata-ps.com/support MDC_UHE_12-30W Series.D05 Page 10 of 16

UHE Series Isolated, High Efficiency, 1.6" × 2" 2-10 Amp, 12-30 Watt DC/DC Converters Typical Performance Curves UHE-5/6000-D48 Temperature Derating UHE-12/2500 and UHE-15/2000 (All Models) Temperature Derating 30 30 75VIN, STILL AIR 12VIN, STILL AIR 25 25 48VIN, STILL AIR 24VIN, STILL AIR 36VIN, STILL AIR (48VIN, Still Air for Q48 Models Only) s) 20 s) 20 Watt 75VIN, 150LFM Watt 48VIN, STILL AIR wer ( 15 75VIN, 300LFM wer ( 15 (D48 Models Only) o o P P ut ut p p Out 10 Out 10 5 5 0 0 –40 0 40 45 50 55 60 65 70 75 80 85 90 95 100 –40 0 40 45 50 55 60 65 70 75 80 85 90 95 100 Ambient Temperature (°C) Ambient Temperature (°C) www.murata-ps.com/support MDC_UHE_12-30W Series.D05 Page 11 of 16

UHE Series Isolated, High Efficiency, 1.6" × 2" 2-10 Amp, 12-30 Watt DC/DC Converters Input Undervoltage Shutdown and Start-Up Threshold Absolute Maximum Ratings Under normal start-up conditions, devices will not begin to regulate until Input Voltage: the ramping-up input voltage exceeds the Start-Up Threshold Voltage. Once Continuous: operating, devices will not turn off until the input voltage drops below the D12 Models 23 Volts D24/Q12 Models 42 Volts Undervoltage Shutdown limit. Subsequent re-start will not occur until the input D48/Q48 Models 81 Volts is brought back up to the Start-Up Threshold. This built in hysteresis prevents Transient (100msec): any unstable on/off situations from occurring at a single input voltage. D12 Models 25 Volts D24/Q12 Models 50 Volts Start-Up Time D48/Q48 Models 100 Volts The Vin to Vout Start-Up Time is the interval of time between the point at which On/Off Control (pin 4) Max. Voltages the ramping input voltage crosses the Start-Up Threshold and the fully loaded Referenced to –Input (pin 2) No Suffix +15 Volts output voltage enters and remains within its specified accuracy band. Actual "N" Suffix +7 Volts measured times will vary with input source impedance, external input/output Input Reverse-Polarity Protection Current must be <5 Amps. Brief capacitance, and load. The UHE Series implements a soft start circuit that limits duration only. Fusing recommended. the duty cycle of its PWM controller at power up, thereby limiting the input Output Current Current limited. Devices can inrush current. withstand sustained output short circuits without damage. The On/Off Control to Vout start-up time assumes the converter has its nominal input voltage applied but is turned off via the On/Off Control pin. The Case Temperature +100°C specification defines the interval between the point at which the converter is Storage Temperature –55 to +125°C turned on and the fully loaded output voltage enters and remains within its Lead Temperature (soldering, 10 sec.) See soldering specifications specified accuracy band. Similar to the Vin to Vout start-up, the On/Off Control to Vout start-up time is also governed by the internal soft start circuitry and These are stress ratings. Exposure of devices to any of these conditions may adversely external load capacitance. affect long-term reliability. Proper operation under conditions other than those listed in the Performance/Functional Specifications Table is not implied. The difference in start up time from Vin to Vout and from On/Off Control to Vout is therefore insignificant. Input Overvoltage Shutdown T E C H N I C A L N O T E S All D12/Q12 and D24 Models of the UHE DC/DC converters are equipped with Input Fusing Input Overvoltage Protection. Input voltages exceeding the input overvoltage Certain applications and/or safety agencies may require the installation of shutdown specification listed in the Performance/Functional Specifications will fuses at the inputs of power conversion components. Fuses should also be cause the device to shutdown. A built-in hysteresis for all models will not allow used if the possibility of sustained, non-current-limited, input-voltage polarity the converter to restart until the input voltage is sufficiently reduced. reversals exists. For MPS’s UHE 12-30 Watt DC/DC Converters, you should use All 48Vin models have this overvoltage shutdown function disabled because slow-blow type fuses, installed in the ungrounded input supply line, with values of requirements for withstanding brief input surges to 100V for up to 100µsec no greater than the following. without output voltage interruption. Model Fuse Values in Amps Please contact MPS to have input overvoltage shutdown for D48/Q48 Output/Input D12 Q12 D24 Q48 D48 models enabled. 1.2 Vout 3 -- 2 -- 1 Input Source Impedance 1.5 Vout 4 -- 2 -- 1 UHE converters must be driven from a low ac-impedance input source. The 1.8 Vout 5 -- 2.5 -- 1 DC/DC's performance and stability can be compromised by the use of highly 2.5 Vout 5 -- 2.5 -- 1 inductive source impedances. The input circuit shown in Figure 2 is a practical 3.3 Vout -- 7.5 - 3 1.5 solution that can be used to minimize the effects of inductance in the input 5 Vout -- 5 - 3 2 traces. For optimum performance, components should be mounted close to 12 Vout 6 3 3 5 2 the DC/DC converter. If the application has a high source impedance, low VIN models can benefit of increased external input capacitance. 15 Vout 6 3 3 5 2 All relevant national and international safety standards and regulations must be I/O Filtering, Input Ripple Current, and Output Noise observed by the installer. For system safety agency approvals, the converters All models in the UHE 12-30 Watt DC/DC Converters are tested/specified for in- must be installed in compliance with the requirements of the end-use safety put reflected ripple current and output noise using the specified external input/ standard, e.g. IEC/EN/UL60950-1. output components/circuits and layout as shown in the following two figures. External input capacitors (CIN in Figure 2) serve primarily as energy-storage elements, minimizing line voltage variations caused by transient IR drops www.murata-ps.com/support MDC_UHE_12-30W Series.D05 Page 12 of 16

UHE Series Isolated, High Efficiency, 1.6" × 2" 2-10 Amp, 12-30 Watt DC/DC Converters in conductors from backplane to the DC/DC. Input caps should be selected Minimum Output Loading Requirements for bulk capacitance (at appropriate frequencies), low ESR, and high rms- UHE converters employ a synchronous-rectifier design topology and all models ripple-current ratings. The switching nature of DC/DC converters requires that regulate within spec and are stable under no-load to full load conditions. dc voltage sources have low ac impedance as highly inductive source imped- Operation under no-load conditions however might slightly increase the output ance can affect system stability. In Figure 2, CBUS and LBUS simulate a typical ripple and noise. dc voltage bus. Your specific system configuration may necessitate additional Thermal Shutdown considerations. These UHE converters are equipped with thermal-shutdown circuitry. If envi- TO ronmental conditions cause the internal temperature of the DC/DC converter to OSCILLOSCOPE CURRENT rise above the designed operating temperature, a precision temperature sensor PROBE +INPUT will power down the unit. When the internal temperature decreases below the LBUS threshold of the temperature sensor, the unit will self start. See Performance/ + Functional Specifications. VIN CBUS CIN – Output Overvoltage Protection –INPUT UHE output voltages are monitored for an overvoltage condition via magnetic CIN = 33µF, ESR < 700mΩ @ 100kHz feedback. The signal is coupled to the primary side and if the output voltage CBUS = 220µF, ESR < 100mΩ @ 100kHz rises to a level which could be damaging to the load, the sensing circuitry will LBUS = 12µH power down the PWM controller causing the output voltages to decrease. Fol- Figure 2. Measuring Input Ripple Current lowing a time-out period the PWM will restart, causing the output voltages to ramp to their appropriate values. If the fault condition persists, and the output In critical applications, output ripple/noise (also referred to as periodic and voltages again climb to excessive levels, the overvoltage circuitry will initiate random deviations or PARD) may be reduced below specified limits using filter- another shutdown cycle. This on/off cycling is referred to as "hiccup" mode. ing techniques, the simplest of which is the installation of additional external Contact MPS for an optional output overvoltage monitor circuit using a output capacitors. These output caps function as true filter elements and comparator which is optically coupled to the primary side thus allowing tighter should be selected for bulk capacitance, low ESR and appropriate frequency and more precise control. response. All external capacitors should have appropriate voltage ratings and be located as close to the converter as possible. Temperature variations for all Current Limiting (Power limit with current mode control) relevant parameters should also be taken carefully into consideration. As power demand increases on the output and enters the specified “limit The most effective combination of external I/O capacitors will be a function inception range” (current in voltage mode and power in current mode) limiting of line voltage and source impedance, as well as particular load and layout circuitry activates in the DC-DC converter to limit/restrict the maximum current conditions. Our Applications Engineers can recommend potential solutions and or total power available. In voltage mode, current limit can have a “constant or discuss the possibility of our modifying a given device's internal filtering to foldback” characteristic. In current mode, once the current reaches a certain meet your specific requirements. Contact our Applications Engineering Group range the output voltage will start to decrease while the output current con- for additional details. tinues to increase, thereby maintaining constant power, until a maximum peak current is reached and the converter enters a “hiccup” (on off cycling) mode of operation until the load is reduced below the threshold level, whereupon it will return to a normal mode of operation. Current limit inception is defined as the +SENSE point where the output voltage has decreased by a pre-specified percentage +OUTPUT (usually a 2% decrease from nominal). C1 C2 SCOPE RLOAD Short Circuit Condition (Current mode control) The short circuit condition is an extension of the “Current Limiting” condition. –OUTPUT When the monitored peak current signal reaches a certain range, the PWM controller’s outputs are shut off thereby turning the converter “off.” This is –SENSE followed by an extended time out period. This period can vary depending on other conditions such as the input voltage level. Following this time out period, C1 = 0.47µF C2 = NA the PWM controller will attempt to re-start the converter by initiating a “normal LOAD 2-3 INCHES (51-76mm) FROM MODULE start cycle” which includes softstart. If the “fault condition” persists, another Figure 3. Measuring Output Ripple/Noise (PARD) “hiccup” cycle is initiated. This “cycle” can and will continue indefinitely until such time as the “fault condition” is removed, at which time the converter will Floating Outputs resume “normal operation.” Operating in the “hiccup” mode during a fault Since these are isolated DC/DC converters, their outputs are "floating" with condition is advantageous in that average input and output power levels are respect to their input. Designers will normally use the –Output (pin 7) as the held low preventing excessive internal increases in temperature. ground/return of the load circuit. You can, however, use the +Output (pin 6) as ground/return to effectively reverse the output polarity. www.murata-ps.com/support MDC_UHE_12-30W Series.D05 Page 13 of 16

UHE Series Isolated, High Efficiency, 1.6" × 2" 2-10 Amp, 12-30 Watt DC/DC Converters Features and Options On/Off Control 2 –INPUT +OUTPUT 6 The input-side, remote On/Off Control function (pin 4) can be ordered to operate 5 +SENSE with either logic type: Standard models are equipped with Positive-logic (no part-number suffix) and 4 OCON/NOTFRFOL TRIM 9 T2U50-R2kNΩ2S LOAD these devices are enabled when pin 4 is left open (or is pulled high, applying to 8 –SENSE +15V with respect to –Input, pin 2) as per Figure 4. Positive-logic devices are disabled when pin 4 is pulled low (0 to 0.8V with respect to –Input). 1 +INPUT –OUTPUT 7 Figure 6. Trim Connections Using A Trimpot 1 +INPUT 13V CIRCUIT 2 –INPUT +OUTPUT 6 4 ON/OFF +SENSE 5 CONTROL 5V CIRCUIT 4 ON/OFF 9 CONTROL TRIM LOAD R1 8 2 –INPUT –SENSE Figure 4. Driving the Positive Logic On/Off Control Pin 1 +INPUT –OUTPUT 7 Optional Negative-logic devices ("N" suffix) are off when pin 4 is left open Figure 7. Trim Connections To Decrease Output Voltages Using a Fixed Resistor (or pulled high, applying +3.5V to +15V), and on when pin 4 is pulled low (0 to (for all models except 1.2V models which will increase VOUT) 0.8V) with respect to –VIN as shown in Figure 5. 2 –INPUT +OUTPUT 6 1 +INPUT +VCC +SENSE 5 4 ON/OFF 9 4 CONTROL TRIM LOAD R2 ON/OFF CONTROL –SENSE 8 1 +INPUT –OUTPUT 7 2 –INPUT Figure 8. Trim Connections To Increase Output Voltages (for all models except 1.2V models which will decrease VOUT) Figure 5. Driving the Negative Logic On/Off Control Pin or –Sense where applicable, will increase the output voltage for all models with Dynamic control of the remote on/off function is best accomplished with a the exception of the 1.2V models, which will decrease the output voltage in this mechanical relay or an open-collector/open-drain drive circuit (optically iso- configuration. lated if appropriate). The drive circuit should be able to sink appropriate current (see Performance Specs) when activated and withstand appropriate voltage Soldering Guidelines when deactivated. Applying an external voltage to pin 4 when no input power is Murata Power Solutions recommends the specifications below when installing these applied to the converter can cause permanent damage to the converter. converters. These specifications vary depending on the solder type. Exceeding these specifications may cause damage to the product. Be cautious when there is high atmo- Trimming Output Voltage spheric humidity. Your production environment may differ; therefore please thoroughly UHE converters have a trim capability (pin 9) that allows users to adjust the review these guidelines with your process engineers. output voltages ±5% of VOUT (±10% for T models). Adjustments to the output voltages can be accomplished via a trim pot (Figure 6) or a single fixed resistor Wave Solder Operations for through-hole mounted products (THMT) as shown in Figures 7 and 8. A single fixed resistor can increase or decrease For Sn/Ag/Cu based solders: the output voltage depending on its connection. The resistor should be located Maximum Preheat Temperature 115° C. close to the converter and have a TCR less than 100ppm/°C to minimize Maximum Pot Temperature 270° C. sensitivity to changes in temperature. If the trim function is not used, leave the Maximum Solder Dwell Time 7 seconds trim pin floating. For Sn/Pb based solders: A single resistor connected from the Trim (pin 9) to the +Output (pin 6), or Maximum Preheat Temperature 105° C. +Sense where applicable, will decrease the output voltage for all models with Maximum Pot Temperature 250° C. the exception of the 1.2V models, which will increase the output voltage in this configuration. A resistor connected from the Trim (pin 9) to the –Output (pin 7), Maximum Solder Dwell Time 6 seconds www.murata-ps.com/support MDC_UHE_12-30W Series.D05 Page 14 of 16

UHE Series Isolated, High Efficiency, 1.6" × 2" 2-10 Amp, 12-30 Watt DC/DC Converters Trim Equations Trim adjustments greater than the specified ±5% can have an adverse affect on the converter's performance and are not recommended. Excessive voltage Trim Up Trim Down differences between VOUT and Sense, in conjunction with trim adjustment of the UHE-1.2/10000-D12, -D24, -D48 output voltage, can cause the overvoltage protection circuitry to activate (see Performance Specifications for overvoltage limits). Power derating is based on 0.4432(VO – 0.397) 0.397 R1 (kΩ) = –1.413 R2 (kΩ) = –1.413 maximum output current and voltage at the converter’s output pins. Use of trim VO – 1.2 1.2 – VO and sense functions can cause output voltages to increase, thereby increasing output power beyond the converter's specified rating or cause output voltages Trim Down Trim Up to climb into the output overvoltage region. Therefore: UHE-1.5/10000-D12, -D24, -D48 (VOUT at pins) x (IOUT) < = rated output power R1 (kΩ) = 0.459(VO – 0.7096) –3.169 R2 (kΩ) = 0.3232 –3.169 Note: Resistor values are in kΩ. Adjustment accuracy is subject to resistor 1.5 – VO VO – 1.5 tolerances and factory-adjusted output accuracy. Vo = desired output voltage. UHE-1.8/10000-D12, -D24, -D48 Remote Sense (Optional on 1.2-5VOUT models) R1 (kΩ) = 1.0271(V.8O – – V 0O.9 352) –7.596 R2 (kΩ) = V0O.9 –6 417.8 –7.596 Ntoorste. :N Tehvee rStheenlsees sa,n ifd tVhOeU Ts elinnsees faurnec itniotenr nisa lnlyo tc uosnende cfoterd r ethmroouteg hre 1g0uΩlat iroens itsh-e user should connect the +Sense to +VOUT and –Sense to –VOUT at the DC/DC UHE-2.5/10000-D12, -D24, -D48 converter pins. R1 (kΩ) = 2.226(VO – 0.9625) –7.503 R2 (kΩ) = 2.142 –7.503 UHE series converters have a sense feature to provide point of use regulation, 2.5 – VO VO – 2.5 thereby overcoming moderate IR drops in pcb conductors or cabling. The remote sense lines carry very little current and therefore require minimal cross-sectional- UHE-3.3/7500-Q12, -Q24, -D48 area conductors. The sense lines are used by the feedback control-loop to regu- R1 (kΩ) = 3.21(VO – 1.759) –22.42 R2 (kΩ) = 5.65 –22.42 late the output. As such, they are not low impedance points and must be treated 3.3 – VO VO – 3.3 with care in layouts and cabling. Sense lines on a pcb should be run adjacent to dc signals, preferably ground. In cables and discrete wiring applications, twisted UHE-5/5000-Q12, -Q48, UHE-5/6000-D48, -Q48 pair or other techniques should be implemented. R1 (kΩ) = 2.15(VO – 2.592) –15.52 R2 (kΩ) = 5.58 –15.52 UHE series converters will compensate for drops between the output voltage 5 – VO VO – 5 at the DC/DC and the sense voltage at the DC/DC provided that: UHE-12/2500-D12, -D24, -D48, -Q12, -Q48 [VOUT(+) –VOUT(–)] –[Sense(+) –Sense (–)] ≤ 5% VOUT R1 (kΩ) = 10(VO – 2.5) –34.8 R2 (kΩ) = 29.5 –34.8 Output overvoltage protection is monitored at the output voltage pin, not 12 – VO VO – 12 the Sense pin. Therefore, excessive voltage differences between VOUT and Sense in conjunction with trim adjustment of the output voltage can cause the UHE-15/2000-D12, -D24, -D48 overvoltage protection circuitry to activate (see Performance Specifications R1 (kΩ) = 13.3(VO – 2.5) –38.3 R2 (kΩ) = 37.875 –38.3 for overvoltage limits). Power derating is based on maximum output current 15 – VO VO – 15 and voltage at the converter’s output pins. Use of trim and sense functions can cause output voltages to increase thereby increasing output power beyond UHE-15/2000-Q12, -Q48 the UHE’s specified rating or cause output voltages to climb into the output R1 (kΩ) = 13.3(VO – 2.5) –34.8 R2 (kΩ) = 37.875 –34.8 overvoltage region. Therefore, the designer must ensure: 15 – VO VO – 15 (VOUT at pins) × (IOUT) ≤ rated output power UHE-3.3/7500-D48T (Quantity order only) Contact and PCB resistance R1 (kΩ) = (2.54/y – 4.08)/2 R2 (kΩ) = 1.55/2y losses due to IR drops where y = (3.3 – VO)/3.3 where y = (VO – 3.3)/3.3 2 –INPUT +OUTPUT 6 UHE-5/6000-Q48T, -D48T (Quantity order only) 5 IOUT +SENSE Sense Current R1 (kΩ) = 1.25/y – 2.69 R2 (kΩ) = 1.25/y 4 OCON/NOTFRFOL TRIM 9 LOAD where y = (5 – VO)/5 where y = (VO – 5)/5 Sense Return 8 –SENSE IOUT Return 1 +INPUT –OUTPUT 7 Contact and PCB resistance losses due to IR drops Figure 9. Remote Sense Circuit Configuration www.murata-ps.com/support MDC_UHE_12-30W Series.D05 Page 15 of 16

UHE Series Isolated, High Efficiency, 1.6" × 2" 2-10 Amp, 12-30 Watt 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 host carrier board for realistic heat absorption and spreading. Both longitudinal and transverse Heating airflow studies are possible by rotation of this carrier board element since there are often significant differences in the heat Precision low-rate dissipation in the two airflow directions. The combination of anemometer adjustable airflow, adjustable ambient heat, and adjustable 3” below UUT Input/Output currents and voltages mean that a very wide 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 witho ut n oti ce. © 20 1 8 Murata Power Solutions, Inc. www.murata-ps.com/support MDC_UHE_12-30W Series.D05 Page 16 of 16

Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: M urata: UHE-12/2500-D12-C UHE-12/2500-D24-C UHE-12/2500-D48-C UHE-12/2500-Q12-C UHE-12/2500-Q48-C UHE- 15/2000-D12-C UHE-15/2000-D24-C UHE-15/2000-D48-C UHE-15/2000-Q12-C UHE-15/2000-Q12N-C UHE- 15/2000-Q48-C UHE-3.3/7500-D48-C UHE-3.3/7500-Q12-C UHE-3.3/7500-Q48-C UHE-5/5000-Q12-C UHE-5/5000- Q48-C UHE-5/6000-D48-C UHE-5/6000-Q12-C