MURATA POWER SOLUTIONS UHE-15/2000-D48-C

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 The UHE 12-30W Series of high-efficiency, All devices feature full I/O fault protection n The most IOUT/POUT in this format 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 high as +60°C, without air flow. Assembled using optional sense pins facilitating either remote load n Five input ranges from 9-75 Volts 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), response (200µsec), and low output ripple/noise and 48Vin (75V max.) models carry the CE mark. n Optional Sense pins for low VOUT (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). shortcomings–output reverse conduction. n 1500 Vdc I/O BASIC Insulation 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) –SENSE OPTO THERMAL (8) ISOLATION SHUTDOWN –INPUT (2) OVERVOLTAGE COMPARATOR PWM REFERENCE & OPTO CONTROLLER ERROR AMP ISOLATION VOUT TRIM (9) UVLO & OVLO 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.D04 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 Regulation (Max.) R/N (mVp-p)➁ Efficiency (See model numbering VOUT IOUT VIN Nom. Range Iin ➂ (Case/ on page 3) Typ. Max. Line Load ➃ (Volts) (Amps) (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  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.D04 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. Contact Murata Power Solutions. 1.2, 1.5, 1.8, 2.5, 3.3, 5, 12 or 15 D12 = 9-18 Volts D24 = 18-36 Volts Maximum Rated Output D48 = 36-75 Volts Q12 = 9-36 Volts Current in mA Q48 = 18-75 Volts Alternate pin lengths are available under special order Options and Adaptations 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 function, modified Trim function (5% trim up = 9.09kΩ, 5% trim down = N Add Negative logic on the On/Off Control function, VOUT trim (pin 9), 3.83kΩ, compatible with UEP-30750), integrated soft start and with input OVP no Sense pins. and thermal shutdown removed. R Positive logic on the On/Off Control function, Vout trim (pin 9), ±Sense RoHS-5 compliance refers to the exclusion of the six hazardous substances pins in the pin 5 and pin 8 positions (available for low Vout models in the RoHS specification with the excepion of lead. MPS’s RoHS-5 products only). Available under special order. 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.D04 Page 3 of 16 UHE Series Isolated, High Efficiency, 1.6" × 2" 2-10 Amp, 12-30 Watt DC/DC Converters MECHANICAL SPECIFICATIONS Dimensions are in inches (mm) shown for ref. only. INPUT/OUTPUT CONNECTIONS 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) .XXX ± 0.010 (0.25) 5 No Pin Sense* 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 (5.1) 0.200 (5.1) 5 6 1 1.60 0.400 (40.6) (10.2) 2 7 0.400 3 0.400 (10.16) (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.D04 Page 4 of 16 UHE Series Isolated, High Efficiency, 1.6" × 2" 2-10 Amp, 12-30 Watt DC/DC Converters Performance/Functional Specifications 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 5V Outputs 6.1-7.5 Volts Overvoltage Shutdown: 12V Outputs 12.7-13.5 Volts D12 Models 18.5-23 Volts 15V Outputs 15.8-16.2 Volts Q12/D24 Models 37-42 Volts Maximum Capacitive Loading: 10,000µF (1.2-5VOUT) D48/Q48 Models Not applicable (Low ESR capacitor) 2,000µF (12-15VOUT) Start-Up Threshold: ➁ 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 ➇ (50-100% load step to ±3% VOUT) 200µsec maximum Undervoltage Shutdown: ➁ Start-Up Time: ➇ 8msec typical D12/Q12 Models 7.0-8.8 Volts VIN to VOUT and On/Off to VOUT 15msec maximum D24/Q48 Models 15-17 Volts 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 ➂ Input Reflected Ripple Current 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. Physical Off = pulled low to 0-0.8V. IIN = 2mA max. 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 (5) Extreme ±3% ➀ All models are tested and specified with a single, external, 0.47µF, multi-layer ceramic output ➁ capacitor and no external input capacitors, unless otherwise noted. All models will effectively Minimum Loading for Specification: No load regulate under no-load conditions (with perhaps a slight increase in output ripple/noise). ➀ Ripple/Noise (20MHz BW) 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. (6) VOUT Trim Range ±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- tion of appropriate voltages (referenced to –Input (pin 2)). Applying a voltage to the On/Off Control ➁ Remote Sense Compensation ±5% 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. ➆ The Current-Limit-Inception point is the output current level at which the converter's power-limiting Current Limit Inception (@98%VOUT): ➆ circuitry drops the output voltage 2% from its initial value. See Output Current Limiting and 10 Amp Models 12-15 Amps 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. ➉ All models are fully operational and meet all published specifications, including "cold start," at –40°C. Short Circuit Current (Hiccup) 1.5-2.3 Amps 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.D04 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 75 VIN = 18V 70 75 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 ° UHE-2.5/10000-D48 Efficiency vs. Load @ +25 C Ambient 85 ° 90 80 88 86 75 84 70 VIN = 36V 82 VIN = 36V 65 VIN = 48V 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 90 85 85 80 80 VIN = 18V VIN = 9V 75 VIN = 24V 75 VIN = 24V 70 70 VIN = 36V VIN = 36V 65 65 1 2 3 4 5 6 7 8 9 10 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.D04 Page 6 of 16 Efficiency (%) Efficiency (%) Efficiency (%) Efficiency (%) Efficiency (%) Efficiency (%) UHE Series Isolated, High Efficiency, 1.6" × 2" 2-10 Amp, 12-30 Watt DC/DC Converters Typical Performance Curves UHE-5/5000-Q48 Efficiency vs. Load @ +25 C Ambient UHE-3.3/7500-Q48 Efficiency vs. Load @ +25 C Ambient ° ° 100 100 90 90 80 80 70 70 VIN = 18V VIN = 18V 60 60 VIN = 36V VIN = 36V VIN = 48V VIN = 48V 50 50 VIN = 75V VIN = 75V 40 40 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 0.75 1.5 2.25 3 3.75 4.5 5.25 6 6.75 7.5 Output Current (Amps) Output Current (Amps) UHE-5/6000-D48 Efficiency vs. Load @ +25 C Ambient UHE-3.3/7500-D48 Efficiency vs. Load @ +25 C Ambient ° ° 100 100 90 90 80 80 70 70 VIN = 36V VIN = 36V 60 60 VIN = 48V VIN = 48V 50 50 VIN = 75V VIN = 75V 40 40 0.6 1.2 1.8 2.4 3 3.6 4.2 4.8 5.4 6 0.75 1.5 2.25 3 3.75 4.5 5.25 6 6.75 7.5 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 89 90 85 85 81 80 77 VIN = 9V VIN = 9V 75 VIN = 12V 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.D04 Page 7 of 16 Efficiency (%) Efficiency (%) Efficiency (%) Efficiency (%) Efficiency (%) Efficiency (%) 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 80 80 VIN = 9V VIN = 9V 75 75 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 80 80 VIN = 18V 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-15/2000-D48 Efficiency vs. Load @ +25 C Ambient UHE-12/2500-D48 Efficiency vs. Load @ +25 C Ambient ° ° 95 95 90 90 85 85 80 80 VIN = 36V VIN = 36V 75 75 VIN = 48V VIN = 48V 70 70 VIN = 75V VIN = 75V 65 65 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 0.25 0.5 0.75 1 1.25 1.5 1.75 2 2.25 2.5 Output Current (Amps) Output Current (Amps) www.murata-ps.com/support MDC_UHE_12-30W Series.D04 Page 8 of 16 Efficiency (%) Efficiency (%) Efficiency (%) Efficiency (%) Efficiency (%) Efficiency (%) 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 VIN = 18V 80 80 VIN = 18V VIN = 48V 75 75 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 7 7 24VIN, 300LFM 24VIN, 300LFM 6 6 5 5 4 4 3 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 75VIN, STILL AIR 48VIN, STILL AIR 8 8 48VIN, 150LFM 48VIN, STILL AIR 7 7 75VIN, 150LFM 48VIN, 300LFM 6 6 48VIN, 150LFM 5 5 48VIN, 300LFM 4 4 3 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.D04 Page 9 of 16 Output Ciurrent (Amps) Output Ciurrent (Amps) Efficiency (%) Output Ciurrent (Amps) Output Ciurrent (Amps) Efficiency (%) UHE Series Isolated, High Efficiency, 1.6" × 2" 2-10 Amp, 12-30 Watt DC/DC Converters Typical Performance Curves UHE-5/5000-Q12 Temperature Derating UHE-2.5/10000-D48 Temperature Derating 25 30 36VIN, STILL AIR 25 20 24VIN, STILL AIR 36VIN, 150LFM 20 NATURAL CONVECTION 15 24VIN, 150LFM 15 36VIN, 300LFM 10 24VIN, 300LFM 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) UHE-3.3/7500-Q12 Temperature Derating UHE-3.3/7500-Q48 Maximum Current Temperature Derating (VIN = 48V, airflow = 300 LFM) 25 8 36VIN, STILL AIR 7 20 24VIN, STILL AIR 6 36VIN, 150LFM 300 LFM 5 15 24VIN, 150LFM 4 36VIN, 300LFM 10 3 24VIN, 300LFM 2 5 1 0 40 50 60 70 80 90 100 0 –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 4 48VIN, STILL AIR 300 LFM 20 36VIN, STILL AIR 3 15 75VIN, 150LFM 2 75VIN, 300LFM 10 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.D04 Page 10 of 16 Output Power (Watts) Output Power (Watts) Output Power (Watts) Output Power (Watts) Output Power (Watts) Output Power (Watts) 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 12VIN, STILL AIR 75VIN, STILL AIR 25 25 48VIN, STILL AIR 24VIN, STILL AIR 36VIN, STILL AIR (48VIN, Still Air for Q48 Models Only) 20 20 75VIN, 150LFM 48VIN, STILL AIR (D48 Models Only) 75VIN, 300LFM 15 15 10 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.D04 Page 11 of 16 Output Power (Watts) Output Power (Watts) 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 Undervoltage Shutdown limit. Subsequent re-start will not occur until the input D24/Q12 Models 42 Volts 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) output voltage enters and remains within its specified accuracy band. Actual No Suffix +15 Volts "N" Suffix +7 Volts measured times will vary with input source impedance, external input/output capacitance, and load. The UHE Series implements a soft start circuit that limits Input Reverse-Polarity Protection Current must be <5 Amps. Brief 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 The On/Off Control to Vout start-up time assumes the converter has its circuits without damage. 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 TECHNICAL NOTES 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 shutdown specification listed in the Performance/Functional Specifications will Certain applications and/or safety agencies may require the installation of 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 the converter to restart until the input voltage is sufficiently reduced. used if the possibility of sustained, non-current-limited, input-voltage polarity 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 the DC/DC converter. If the application has a high source impedance, low VIN 12 Vout 6 3 3 5 2 models can benefit of increased external input capacitance. 15 Vout 6 3 3 5 2 I/O Filtering, Input Ripple Current, and Output Noise All relevant national and international safety standards and regulations must be 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.D04 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 CURRENT OSCILLOSCOPE 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 inception range” (current in voltage mode and power in current mode) limiting The most effective combination of external I/O capacitors will be a function circuitry activates in the DC-DC converter to limit/restrict the maximum current of line voltage and source impedance, as well as particular load and layout or total power available. In voltage mode, current limit can have a “constant or conditions. Our Applications Engineers can recommend potential solutions and foldback” characteristic. In current mode, once the current reaches a certain discuss the possibility of our modifying a given device's internal filtering to range the output voltage will start to decrease while the output current con- meet your specific requirements. Contact our Applications Engineering Group tinues to increase, thereby maintaining constant power, until a maximum peak for additional details. 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). RLOAD C1 C2 SCOPE 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.D04 Page 13 of 16 UHE Series Isolated, High Efficiency, 1.6" × 2" 2-10 Amp, 12-30 Watt DC/DC Converters Features and Options 6 2 +OUTPUT –INPUT On/Off Control 5 The input-side, remote On/Off Control function (pin 4) can be ordered to operate +SENSE with either logic type: 20kΩ 4 9 ON/OFF TRIM 5-22 LOAD CONTROL Standard models are equipped with Positive-logic (no part-number suffix) and TURNS 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 1 7 +INPUT disabled when pin 4 is pulled low (0 to 0.8V with respect to –Input). –OUTPUT Figure 6. Trim Connections Using A Trimpot 1 +INPUT 6 2 13V CIRCUIT +OUTPUT –INPUT 4 5 ON/OFF +SENSE CONTROL 5V CIRCUIT 4 9 ON/OFF TRIM LOAD CONTROL R1 8 –INPUT –SENSE 2 1 7 +INPUT –OUTPUT Figure 4. Driving the Positive Logic On/Off Control Pin 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. 6 2 +OUTPUT –INPUT 1 +INPUT +VCC 5 +SENSE 4 9 ON/OFF TRIM LOAD 4 CONTROL R2 ON/OFF 8 CONTROL –SENSE 1 7 +INPUT –OUTPUT –INPUT 2 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 Maximum Solder Dwell Time 6 seconds configuration. A resistor connected from the Trim (pin 9) to the –Output (pin 7), www.murata-ps.com/support MDC_UHE_12-30W Series.D04 Page 14 of 16 UHE Series Isolated, High Efficiency, 1.6" × 2" 2-10 Amp, 12-30 Watt DC/DC Converters Trim adjustments greater than the specified ±5% can have an adverse affect Trim Equations 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 0.459(VO – 0.7096) 0.3232 R1 (kΩ) = – 3.169 R2 (kΩ) = – 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) 1.027(VO – 0.9352) 0.9647 Note: The Sense and VOUT lines are internally connected through 10Ω resis- – 7.596 – 7.596 R1 (kΩ) = R2 (kΩ) = VO – 1.8 tors. Nevertheless, if the sense function is not used for remote regulation the 1.8 – VO user should connect the +Sense to +VOUT and –Sense to –VOUT at the DC/DC UHE-2.5/10000-D12, -D24, -D48 converter pins. 2.226(VO – 0.9625) 2.142 – 7.503 UHE series converters have a sense feature to provide point of use regulation, R1 (kΩ) = R2 (kΩ) = – 7.503 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- 3.21(VO – 1.759) 5.65 late the output. As such, they are not low impedance points and must be treated – 22.42 R1 (kΩ) = – 22.42 R2 (kΩ) = VO – 3.3 3.3 – VO 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. 2.15(VO – 2.592) 5.58 – 15.52 R1 (kΩ) = – 15.52 R2 (kΩ) = 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 10(VO – 2.5) 29.5 Output overvoltage protection is monitored at the output voltage pin, not – 34.8 – 34.8 R1 (kΩ) = R2 (kΩ) = VO – 12 12 – VO 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 13.3(VO – 2.5) 37.875 for overvoltage limits). Power derating is based on maximum output current – 38.3 R1 (kΩ) = – 38.3 R2 (kΩ) = 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 13.3(VO – 2.5) 37.875 overvoltage region. Therefore, the designer must ensure: – 34.8 R1 (kΩ) = – 34.8 R2 (kΩ) = VO – 15 15 – VO (VOUT at pins) × (IOUT) ≤ rated output power UHE-3.3/7500-D48T (Quantity order only) Contact and PCB resistance R2 (kΩ) = 1.55/2y R1 (kΩ) = (2.54/y – 4.08)/2 losses due to IR drops 6 2 where y = (3.3 – VO)/3.3 where y = (VO – 3.3)/3.3 +OUTPUT –INPUT IOUT 5 UHE-5/6000-Q48T, -D48T (Quantity order only) +SENSE Sense Current 4 R1 (kΩ) = 1.25/y – 2.69 R2 (kΩ) = 1.25/y ON/OFF 9 TRIM LOAD CONTROL where y = (5 – VO)/5 where y = (VO – 5)/5 Sense Return 8 –SENSE IOUT Return 1 7 +INPUT –OUTPUT 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.D04 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 dissipation in the two airflow directions. The combination of low-rate adjustable airflow, adjustable ambient heat, and adjustable anemometer Input/Output currents and voltages mean that a very wide 3” below UUT range of measurement conditions can be studied. The collimator reduces the amount of turbulence adjacent Ambient to the UUT by minimizing airflow turbulence. Such turbu- temperature lence influences the effective heat transfer characteristics sensor and gives false readings. Excess turbulence removes more heat from some surfaces and less heat from others, possibly Airflow causing uneven overheating. collimator Both sides of the UUT are studied since there are different thermal gradients on each side. The adjustable heating element and fan, built-in temperature gauges, and no-contact IR camera mean Figure 10. Vertical Wind Tunnel that power supplies are tested in real-world conditions. This product is subject to the following operating requirements Murata Power Solutions, Inc. and the Life and Safety Critical Application Sales Policy: 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_UHE_12-30W Series.D04 Page 16 of 16