UWR 26-40W Series www.murata-ps.com Single Output, High-Density, 3.3VOUT and 5 VOUT, 26-40 Watt, DC/DC Converters FEATURES Standard 2" x 2" packages/pinouts Output voltages/currents: • 3.3 Volts @ 8/9 Amps • 5 Volts @ 7/8 Amps Choice of 3 input voltage ranges: 10-18V, 18-36V, 36-75V Fully synchronous forward topology Outstanding performance: • ±1% setpoint accuracy • Efficiencies to 90% • Noise as low as 75mVp-p • Stable no-load operation On/off control and VOUT trim pins Fully isolated (1500Vdc); I/O protected Thermal shutdown Designed to meet UL/EN/IEC60950-1 certification; CE marked PRODUCT OVERVIEW The newest products in Murata Power Solutions' flagship A-Series are the UWR, 26-40 Watt isolated singles. Housed in standard 2" x 2" metal packages (which have traditionally carried 15-20 Watt devices), these power converters supply up to 9 Amps @ 3.3V or 8 Amps at 5V. They exemplify Murata Power Solutions' relentless drive to bring designers more power/current, in standard packages/pinouts, without compromising reliability or resorting to thermal specmanship. Input voltage ranges are 10-18V (“D12” models), 1836V (“D24” models) or 36-75V (“D48”) models. Employing an advanced, fully synchronous, high-frequency (300-360kHz) forward topology, UWR 26-40W singles attain 88-90% efficiencies enabling full-power operation to ambient temperatures as high as +55°C without supplemental air flow. Assembled using fully automated, SMT-on-pcb techniques, these DC/DC’s additionally provide low noise (75mVp-p), high accuracy (±1%), tight line/load regulation (±0.5%), quick step response (200µsec), and stable no-load operation. All models feature input pi filters, input undervoltage and overvoltage shutdown, output overvoltage protection, current limiting, short-circuit protection, and thermal shutdown. Each model has a VOUT trim pin as well as an on/off control function that may be ordered with either positive or negative logic. These devices are fully isolated (1500Vdc) and satisfy UL/EN/IEC60950-1 safety requirements. “D48” models (36-75V inputs) are CE marked. FIGURE 1. SIMPLIFIED SCHEMATIC +OUTPUT (6) +INPUT (1) SWITCH CONTROL –OUTPUT (7) THERMAL SHUTDOWN –INPUT (2) PWM CONTROLLER ON/OFF CONTROL (4) UVLO & OVLO COMPARATORS OPTO ISOLATION REFERENCE & ERROR AMP VOUT TRIM (8) Typical topology is shown. For full details go to www.murata-ps.com/rohs www.murata-ps.com/support MDC_UWR26-40W.D01 Page 1 of 10 UWR 26-40W Series Single Output, High-Density, 3.3VOUT and 5 VOUT, 26-40 Watt, DC/DC Converters Performance Specifications and Ordering Guide ➀ Input Output Model ➄ VOUT (Volts) IOUT (Amps) R/N (mVp-p) ➁ Typ. Regulation (Max.) Max. Line Load ➂ VIN Nom. (Volts) Range (Volts) IIN ➃ (mA/A) Typ. Package (Case, Pinout) Efficiency Min. UWR-3.3/8-D12A-C 3.3 8 75 110 ±0.05% ±0.5% 12 10-18 145/2.97 88% 89% C4, P6 UWR-3.3/9-D24A-C 3.3 9 75 110 ±0.5% ±0.5% 24 18-36 50/1.4 86% 88.5% C4, P6 UWR-3.3/9-D48AN-C 3.3 9 75 110 ±0.5% ±0.5% 48 36-75 25/0.7 86% 88.5% C4, P6 UWR-5/7-D12A-C 5 7 75 110 ±0.5% ±0.5% 12 10-18 160/3.26 85.5% 89.5% C4, P6 UWR-5/8-D24A-C 5 8 75 110 ±0.05% ±0.15% 24 18-36 90/1.82 90% 91.5% C4, P6 UWR-5/8-D48AN-C 5 8 75 110 ±0.5% ±0.5% 48 36-75 25/0.93 86% 90% C4, P6 As of September 2014, ONLY the following part numbers will be available: UWR-3.3/8-D12A-C; UWR-5/8-D24A-C ➀ Typical at TA = +25°C under nominal line voltage and full-load conditions, unless noted. ➁ Ripple/Noise (R/N) is tested/speciifed over a 20MHz bandwidth. All models are specified with an external 0.47µF multi-layer ceramic capacitor installed across their output pins. Using a 10µF multi-layer ceramic capacitor instead (e.g. TDK part no. C3225X5R1C106M) will further reduce the R/N to 35mVp-p typical and 75mVp-p maximum. ➂ Load regulation is specified over 0-100% load conditions. All models are stable and regulate within spec under no-load conditions, with perhaps a slight increase in output ripple/noise. ➃ Nominal line voltage, no-load/full-load conditions. ➄ Please refer to the part number structure when ordering. P A R T N U M B E R M E C H A N I C A L S T R U C T U R E U WR - 3.3 / 9 - D48 A N - C Output Configuration: U = Unipolar RoHS-6 hazardous substance compliant Wide Range Input S P E C I F I C A T I O N S 2.00 (50.8) 0.45 (11.4) METAL CASE Case C4 On/Off Logic, see below Nominal Output Voltage: 3.3 or 5 Volts INSULATED BASE 0.20 MIN (5.1) A-Series High Reliability Maximum Output Current in Amps Input Voltage Range: D12 = 10-18 Volts (12V nominal) D24 = 18-36 Volts (24V nominal) D48 = 36-75 Volts (48V nominal) 0.040 ± 0.002 DIA. (1.02 ± 0.05) 1.800 (45.72) 0.10 (2.5) 5 0.200 (5.08) 6 1 2 Part Number Suffixes UWR 26-40W DC/DC's are designed so the On/Off Control function on pin 4 can be ordered with either positive (open or "high" = on) or negative (open = off, pull low = on) logic. The standard part number with no suffix denotes positive logic. Add an "N" suffix to select negative logic. No Suffix 7 0.400 (10.16) On/Off Control function (positive logic) on pin 4. Standard for D12, D24. 1.200 (30.48) 3 EQ. SP. @ 0.400 (10.16) 2.00 (50.8) 4 8 0.100 (2.54) 0.40 (10.2) BOTTOM VIEW "N" Suffix On/Off Control function (negative logic) on pin 4. Standard for D48. I/O Connections Pin Function P6 1 +Vin 2 –Vin 3 No Pin 4 On/Off Control 5 No Pin 6 +Vout 7 –Vout 8 Trim Dimensions are in inches (mm shown for ref. only). Note Third Angle Projection For D12A and D24A models, the case is connected to Pin 2 (–Input). For D48A models, the case is connected to Pin 1 (+Input). Tolerances (unless otherwise specified): .XX ± 0.02 (0.5) .XXX ± 0.010 (0.25) Angles ± 2˚ Components are shown for reference only. www.murata-ps.com/support MDC_UWR26-40W.D01 Page 2 of 10 UWR 26-40W Series Single Output, High-Density, 3.3VOUT and 5 VOUT, 26-40 Watt, DC/DC Converters Performance/Functional Specifications Typical @ TA = +25°C under nominal line voltage and full-load conditions, unless noted. ➀➁ Dynamic Characteristics Input Input Voltage Range: D12 Models D24 Models D48 Models 10-18 Volts (12V nominal) 18-36 Volts (24V nominal) 36-75 Volts (48V nominal) Overvoltage Shutdown: D12 Models D24 Models D48 Models 19-23 Volts (21V typical) 37-43 Volts (40V typical) 76.5-82 Volts (78V typical) Start-Up Threshold: ➂ D12 Models D24 Models D48 Models 8.5-10 Volts (9V typical) 16-18 Volts (17V typical) 33.5-36 Volts (35V typical) Undervoltage Shutdown: ➂ D12 Models D24 Models D48 Models 7.5-9 Volts (8V typical) 15-17 Volts (16V typical) 31-33.5 Volts (32V typical) Input Current: Normal Operating Conditions Standby Mode (Off, OV, UV) See Ordering Guide 5mA Input Reflected Ripple Current 250mAp-p Dynamic Load Response: (50-100% load step to 1% VOUT) 200µsec maximum Start-Up Time: VIN to VOUT On/Off to VOUT 10ms 10ms Switching Frequency: UWR-3.3/8-D12A UWR-3.3/9-D24A, -D48A UWR-5/7-D12A UWR-5/8-D24A, -D48A 360kHz (±36kHz) 300kHz (±30kHz) 360kHz (±36kHz) 310kHz (±30kHz) Environmental MTBF ➅ UWR-5/8-D24A Bellcore, ground fixed, full power 25°C ambient 1.6 million hours Operating Temperature ➁ -40 to +85°C, with derating Thermal Shutdown +110°C case Storage Temperature –40 to +120°C Flammability UL94V-0 Physical Input Filter Type D12 Models D24 Models D48 Models Capacitive (13.2µF) Pi (0.01µF-1µH-6.6µF) Pi (0.01µF-2.2µH-2µF) Reverse-Polarity Protection Brief duration, 5A maximum On/Off Control: ➃ ➄ On = open or 13V - +VIN, IIN = 1.6mA max. Off = 0-0.8V, IIN = 2.6mA max. On = 0-0.8V, IIN = 1mA max. Off = open or 3.3-+VIN, IIN = 1mA max. "N" Models Output VOUT Accuracy (50% load): Dimensions See mechanical specifications Case Material Corrosion resistant steel with non-conductive, epoxy-based, black enamel finish and plastic baseplate Pin Material RoHS: Gold plate over copper alloy Non-RoHS: Pure tin over copper alloy Weight: 2.7 ounces (76.5 grams) Primary to Secondary Insulation Level Functional (D12, D24 models) Basic (D48 models) ±1.0%, maximum Minimum Loading for Specification: ➁ 10% of IOUT maximum Minimum Loading for Stability: ➆ No load Ripple/Noise (20MHz BW) ➀ ➅ See Ordering Guide Line/Load Regulation See Ordering Guide Efficiency See Ordering Guide Trim Range ➁ ±5% Isolation Voltage: Input-to-Output Output to Case 1500Vdc minimum 1500Vdc minimum Isolation Capacitance 470pF Isolation Resistance 100MΩ Current Limit Inception (@98%VOUT): 3.3VOUT Models 5VOUT Models 10.5-11.5 Amps 8.5-9.5 Amps Short Circuit Current: (Average) 3.3VOUT Models 5VOUT Models 3 Amps maximum 4 Amps maximum Overvoltage Protection: 3.3VOUT Models 5VOUT Models Output voltage comparator 3.7-4.1 Volts 5.6-7.1 Volts Temperature Coefficient ±0.02% per °C. ➀ All models are specified with external 0.47µF ceramic output capacitor. ➁ See Technical Notes/Graphs for details. ➂ Applying a voltage to On/Off Control (pin 4) when no input power is applied to the converter can cause permanent damage. ➃ Output noise may be further reduced with the addition of additional external output capacitors. See Technical Notes. 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. ➄ The On/Off Control is designed to be driven with open-collector logic or the application of appropriate voltage levels. Voltages may be referenced to the –Input (pin 2). ➅ Demonstrated MTBF available on request. www.murata-ps.com/support MDC_UWR26-40W.D01 Page 3 of 10 UWR 26-40W Series Single Output, High-Density, 3.3VOUT and 5 VOUT, 26-40 Watt, DC/DC Converters Absolute Maximum Ratings Input Voltage: Continuous: D12A Models D24A Models D48A Models Transient (100msec): D12A Models D24A Models D48A Models On/Off Control (pin 4) Max. Voltages Referenced to –Input (pin 2) No Suffix "N" Suffix 18 Volts 36 Volts 75 Volts 25 Volts 50 Volts 100 Volts +VIN +VIN Input Reverse-Polarity Protection Current must be <5 Amps. Brief duration only. Fusing recommended. Output Current Current limited. Devices can withstand sustained output short circuits without damage. Case Temperature +100°C Storage Temperature –40 to +120°C Lead Temperature See soldering guidelines These are stress ratings. Exposure of devices to greater than any of these conditions may adversely affect long-term reliability. Proper operation under conditions other than those listed in the Performance/Functional Specifications Table is not implied. T E C H N I C A L N O T E S Floating Outputs Since these are isolated DC/DC converters, their outputs are "floating," with respect to the input. Designers will normally use the –Output (pin 7) as the ground/return of the load circuit. You can, however, use the +Output (pin 6) as ground/return to effectively reverse the output polarity. Minimum Output Loading Requirements Input Fusing Certain applications and/or safety agencies may require the installation of fuses at the inputs of power conversion components. Fuses should also be used if the possibility of sustained, non-current-limited, input-voltage polarity reversals exists. For Murata Power Solutions A-Series UWR 26-40 Watt DC/ DC Converters, you should use slow-blow type fuses with values no greater than the following. Model Fuse Value UWR-3.3/8-D12 UWR-3.3/9-D24 UWR-3.3/9-D48 7 Amps 4 Amps 2 Amps UWR-5/7-D12 UWR-5/8-D24 UWR-5/8-D48 8 Amps 5 Amps 3 Amps Start-Up and Undervoltage Shutdown Under normal start-up conditions, UWR 26-40W converters will not begin to regulate properly until the ramping input voltage exceeds the Start-Up Threshold. Once operating, devices will turn off when the applied voltage droops below the Undervoltage Shutdown point. Devices will remain off as long as the undervoltage condition continues. Units will automatically restart when the applied voltage is brought back above the Start-Up Threshold.. The hysteris is built into the function avoids an indeterminate on/off condition at a single input voltage . See Performance/Functional Specifications table for actual limits. On/Off Control The input-side, remote On/Off Control function (pin 4) can be ordered to operate with either logic. Positive-logic devices (standard, no part-number suffix) are enabled when pin 4 is left open or is pulled high (+13V to VIN applied with respect to –Input, pin 2, (see Figure 2). Positive-logic devices are disabled when pin 4 is pulled low (0-0.8V with respect to –Input). Negative-logic devices are off when pin 4 open or pulled high (3.3V to +VIN), and on when pin 4 is pulled low (0-0.8V). See Figure 3. UWR 26-40 Watt converters employ a synchronous-rectifier design topology. All models regulate within spec and are stable under no-load conditions. 1 +VIN Filtering and Noise Reduction All UWR 26-40 Watt DC/DC Converters achieve their rated ripple and noise specifications using the external output capacitor specified in the Performance/Functional Specifications table. In critical applications, input/output noise may be further reduced by installing additional external I/O caps. Input capacitors should be selected for bulk capacitance, low ESR and high rms-ripple-current ratings. Input capacitors serve as energy-storage devices to minimize variations in line voltage caused by transient IR drops in PCB conductors from backplane to the DC/DC. Output capacitors should be selected for low ESR and appropriate frequency response. All caps should have appropriate voltage ratings and be mounted as close to the converters as possible. The most effective combination of external I/O capacitors will be a function of your particular load and layout conditions. 13V CIRCUIT 4 ON/OFF CONTROL 2 5V CIRCUIT –VIN Figure 2. Driving the Positive Logic On/Off Control Pin www.murata-ps.com/support MDC_UWR26-40W.D01 Page 4 of 10 UWR 26-40W Series Single Output, High-Density, 3.3VOUT and 5 VOUT, 26-40 Watt, DC/DC Converters Current Limiting 1 +VIN 4 ON/OFF CONTROL 2 –VIN Figure 3. Driving the Negative Logic On/Off Control Pin Dynamic control of the remote on/off function is best accomplished with a mechanical relay or an open-collector/open-drain drive circuit (optically isolated if appropriate). The drive circuit should be able to sink appropriate current (see Performance Specs) when activated and withstand appropriate voltage when deactivated. Applying an external voltage to pin 4 when no input power is applied to the converter can cause permanent damage to the converter. Start-Up Time The VIN to VOUT start-up time is the interval of time where the input voltage crosses the turn-on threshold point, and the fully loaded output voltage enters and remains within its specified accuracy band. Actual measured times will vary with input source impedance, external input/output capacitance, and load. The UWR 26-40 Watt implements a soft start circuit that limits the duty cycle of the PWM controller at power up, thereby limiting the Input Inrush current. 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 specification defines the interval between the time at which the converter is turned on and the fully loaded output voltage enters and remains within its 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 external load capacitance. Input Overvoltage/Undervoltage Shutdown and Start-Up Threshold Under normal start-up conditions, devices will not begin to regulate until the ramping-up input voltage exceeds the Start-Up Threshold Voltage (35V for "D48" models). Once operating, devices will not turn off until the input voltage drops below the Undervoltage Shutdown limit (34V for "D48" models). Subsequent re-start will not occur until the input is brought back up to the Start-Up Threshold. This built in hysteresis prevents any unstable on/off situations from occurring at a single input voltage. When output power increases above the rated output current, (see Current Limit in Performance/Functional Specifications) the DC/DC converter will go into a current limiting mode. In this condition the output voltage will decrease proportionately with increases in output current, thereby maintaining a somewhat constant power dissipation. This is commonly referred to as power limiting. Current limit inception is defined as the point where the full-power output voltage falls below the specified tolerance. See Performance/Functional Specifications. If the load current being drawn from the converter is significant enough, the unit will go into a short circuit condition. See "Short Circuit Condition." Short Circuit Condition When a converter is in current limit mode the output voltages will drop as the output current demand increases. If the output voltage drops too low, the magnetically coupled voltage used to develop primary side voltages will also drop, thereby shutting down the PWM controller. Following a time-out period the PWM will restart causing the output voltages to begin ramping to their appropriate values. If the short-circuit condition persists, another shutdown cycle will be initiated. This on/off cycling is referred to as "hiccup" mode. The hiccup cycling reduces the average output current, thereby preventing internal temperatures from rising to excessive levels. The UWR 26-40 Watt A-Series is capable of enduring an indefinite short circuit output condition. Thermal Shutdown These A-Series converters are equipped with Thermal Shutdown Circuitry. If environmental conditions cause the internal temperature of the DC/DC converter to rise above the designed operating temperature, a precision temperature sensor will power down the unit. When the internal temperature decreases below the threshold of the temperature sensor the unit will self start. See Performance/Functional Specifications. Output Overvoltage Protection The output voltage is monitored for an overvoltage condition via magnetic coupling to the primary side. If the output voltage rises to a fault condition, which could be damaging to the load circuitry (see Performance Specifications), the sensing circuitry will power down the PWM controller causing the output voltage to decrease. Following a time-out period the PWM will restart, causing the output voltage to ramp to its appropriate value. If the fault condition persists, and the output voltages again climb to excessive levels, the overvoltage circuitry will initiate another shutdown cycle. This on/off cycling is referred to as "hiccup" mode. Input voltages exceeding the input overvoltage shutdown specification listed in the Performance/Functional Specifications will cause the device to shutdown. A built-in hysteresis of 0.6 to 1.6 Volts for all models will not allow the converter to restart until the input voltage is sufficiently reduced. www.murata-ps.com/support MDC_UWR26-40W.D01 Page 5 of 10 UWR 26-40W Series Single Output, High-Density, 3.3VOUT and 5 VOUT, 26-40 Watt, DC/DC Converters Trimming Output Voltage UWR 26-40W converters have a trim capability (pin 8) that allows users to adjust the output voltages ±5%. Adjustments to the output voltages can be accomplished via a trim pot (Figure 5) or a single fixed resistor as shown in Figures 6 and 7. A single fixed resistor can increase or decrease the output voltage depending on its connection. Resistors should be located close to the converter and have TCR's less than 100ppm/°C to minimize sensitivity to changes in temperature. If the trim function is not used, leave the trim pin floating. A single resistor connected from the Trim (pin 8) to the +Output (pin 6), will decrease the output voltage. A resistor connected from the Trim (pin 8) to the –Output (pin 7) , –Sense where applicable, will increase the output voltage. 2 +VOUT –VIN 6 +SENSE 4 ON/OFF CONTROL TRIM 8 LOAD RTRIM UP –SENSE 1 +VIN –VOUT 7 Figure 7. Trim Connections To Increase Output Voltages Using Fixed Resistors Trim Equations For 3.3 Volt Models Trim adjustments greater than the specified ±5% can have an adverse affect on the converter’s performance and are not recommended. Excessive trim adjustment of the output voltage can cause the overvoltage protection circuitry to activate (see Performance Specifications for overvoltage limits). Power derating is based on maximum output current and voltage at the converter's output pins. Use of trim can cause output voltages to increase thereby increasing output power beyond the UWR's specified rating or cause output voltages to climb into the output overvoltage region. Therefore: (VOUT at pins) x (IOUT) <= rated output power 2 –VIN +VOUT RTDOWN (kΩ) = 2.49(VO – 1.23) RT UP (kΩ) = 1 ON/OFF CONTROL +VIN TRIM –VOUT 3.06 VO – 3.3 –13 Trim Equations For 5 Volt Models RTDOWN (kΩ) = 2.49(VO – 2.51) –16.9 5 – VO 6 RT UP (kΩ) = 4 –13 3.3 – VO 20kΩ 5-22 TURNS 8 6.25 VO – 5 –16.9 LOAD Note: Resistor values are in kΩ. Accuracy of adjustment is subject to the tolerances of resistors and factory-adjusted output accuracy. VO = desired output voltage. 7 Soldering Guidelines Figure 5. Trim Connections Using A Trimpot 2 –VIN +VOUT Murata Power Solutions recommends the specifications below when installing these converters. These specifications vary depending on the solder type. Exceeding these specifications may cause damage to the product. Be cautious when there is high atmospheric humidity. We strongly recommend a mild pre-bake (100° C. for 30 minutes). Your production environment may differ; therefore please thoroughly review these guidelines with your process engineers. 6 Wave Solder Operations for through-hole mounted products (THMT) 4 1 ON/OFF CONTROL +VIN TRIM 8 LOAD For Sn/Ag/Cu based solders: RTRIM DOWN –VOUT 7 Maximum Preheat Temperature 115° C. Maximum Pot Temperature 270° C. Maximum Solder Dwell Time 7 seconds For Sn/Pb based solders: Figure 6. Trim Connections To Decrease Output Voltages Using Fixed Resistors Maximum Preheat Temperature 105° C. Maximum Pot Temperature 250° C. Maximum Solder Dwell Time 6 seconds www.murata-ps.com/support MDC_UWR26-40W.D01 Page 6 of 10 UWR 26-40W Series Single Output, High-Density, 3.3VOUT and 5 VOUT, 26-40 Watt, DC/DC Converters TYPICAL PERFORMANCE CURVES UWR-3.3/8-D12 Efficiency vs. Load @ 25˚C Ambient UWR-5/7-D12 Efficiency vs. Load @ 25˚C Ambient 92 92 88 88 84 Efficiency (%) Efficiency (%) 84 80 76 VIN = 10V 72 76 72 VIN = 10V VIN = 12V 68 VIN = 12V VIN = 18V 64 VIN = 18V 68 64 80 60 56 0.8 1.6 2.4 3.2 4 4.8 5.6 6.4 7.2 8 0.7 1.4 2.1 Output Current (Amps) 2.8 3.5 4.2 4.9 5.6 6.3 7 7.2 8 7.2 8 Output Current (Amps) UWR-3.3/9-D24 Efficiency vs. Load @ 25˚C Ambient UWR-5/8-D24 Efficiency vs. Load @ 25˚C Ambient 92 92 88 88 84 Efficiency (%) Efficiency (%) 84 80 76 VIN = 18V 72 76 72 VIN = 18V VIN = 24V 68 VIN = 24V VIN = 36V 64 VIN = 36V 68 64 80 60 56 0.9 1.8 2.7 3.6 4.5 5.4 6.3 7.2 8.1 9 0.8 1.6 2.4 Output Current (Amps) 3.2 4 4.8 5.6 6.4 Output Current (Amps) UWR-3.3/9-D48 Efficiency vs. Load @ 25˚C Ambient UWR-5/8-D48 Efficiency vs. Load @ 25˚C Ambient 92 92 88 88 84 Efficiency (%) Efficiency (%) 84 80 76 VIN = 36V 72 76 72 VIN = 36V VIN = 48V 68 VIN = 48V VIN = 75V 64 VIN = 75V 68 64 80 60 56 0.9 1.8 2.7 3.6 4.5 5.4 6.3 Output Current (Amps) 7.2 8.1 9 0.8 1.6 2.4 3.2 4 4.8 5.6 6.4 Output Current (Amps) www.murata-ps.com/support MDC_UWR26-40W.D01 Page 7 of 10 UWR 26-40W Series Single Output, High-Density, 3.3VOUT and 5 VOUT, 26-40 Watt, DC/DC Converters TYPICAL PERFORMANCE CURVES UWR-3.3/8-D12A Start-Up from VIN UWR-3.3/8-D12A Output Ripple and Noise (PARD) (VIN = 12V, full load, external 0.47µF output capacitor.) (VIN = 12V, full load, external 0.47µF output capacitor.) VIN 5V/div 20mV/div 20MHz BW VOUT 2V/div 1ms/div UWR-3.3/9-D24A Start-Up from VIN UWR-3.3/9-D24A Output Ripple and Noise (PARD) (VIN = 24V, full load, external 0.47µF output capacitor.) (VIN = 24V, full load, external 0.47µF output capacitor.) VIN 10V/div 20mV/div 20MHz BW VOUT 1V/div 1ms/div UWR-3.3/9-D48A Start-Up from VIN UWR-3.3/9-D48A Output Ripple and Noise (PARD) (VIN = 48V, full load, external 0.47µF output capacitor.) (VIN = 48V, full load, external 0.47µF output capacitor.) VIN 20V/div 20mV/div 20MHz BW VOUT 1V/div 1ms/div www.murata-ps.com/support MDC_UWR26-40W.D01 Page 8 of 10 UWR 26-40W Series Single Output, High-Density, 3.3VOUT and 5 VOUT, 26-40 Watt, DC/DC Converters TYPICAL PERFORMANCE CURVES UWR-5/7-D12A Start-Up from VIN UWR-5/8-D12A Output Ripple and Noise (PARD) (VIN = 12V, full load, external 0.47µF output capacitor.) (VIN = 12V, full load, external 0.47µF output capacitor.) VIN 5V/div 20mV/div 20MHz BW VOUT 2V/div 2ms/div UWR-5/8-D24A Start-Up from VIN UWR-5/8-D24A Output Ripple and Noise (PARD) (VIN = 24V, full load, external 0.47µF output capacitor.) (VIN = 24V, full load, external 0.47µF output capacitor.) VIN 10V/div 20mV/div 20MHz BW VOUT 2V/div 1ms/div UWR-5/8-D48A Start-Up from VIN UWR-5/8-D48A Output Ripple and Noise (PARD) (VIN = 48V, full load, external 0.47µF output capacitor.) (VIN = 48V, full load, external 0.47µF output capacitor.) VIN 20V/div 20mV/div 20MHz BW VOUT 2V/div 1ms/div www.murata-ps.com/support MDC_UWR26-40W.D01 Page 9 of 10 UWR 26-40W Series Single Output, High-Density, 3.3VOUT and 5 VOUT, 26-40 Watt, DC/DC Converters TYPICAL PERFORMANCE CURVES 3.3VOUT Temperature Derating – Natural Convection 5VOUT Temperature Derating – Natural Convection 35 45 40 30 35 Output Power (Watts) Output Power (Watts) 25 UWR-3.3/9-D24A A UWR-3.3/9-D48A A 20 15 UWR-3.3/8-D12A UWR-5/8-D24A UWR-5/8-D48A 30 25 20 UWR-5/7-D12A 15 10 10 5 5 0 0 –40 0 40 45 50 55 60 65 70 75 Ambient Temperature (°C) Murata Power Solutions, Inc. 11 Cabot Boulevard, Mansfield, MA 02048-1151 U.S.A. ISO 9001 and 14001 REGISTERED 80 85 90 95 100 –40 0 40 45 50 55 60 65 70 75 80 85 90 95 100 Ambient Temperature (°C) This product is subject to the following operating requirements and the Life and Safety Critical Application Sales Policy: Refer to: http://www.murata-ps.com/requirements/ 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. © 2015 Murata Power Solutions, Inc. www.murata-ps.com/support MDC_UWR26-40W.D01 Page 10 of 10