UEI25 Series www.murata-ps.com Single Output Isolated 25-Watt DC/DC Converters Output (V) Typical unit Current (A) 3.3 7.5 48 5 5 48 12 2.1 48 FEATURES PRODUCT OVERVIEW Cost effective small footprint DC/DC converter, ideal for high current applications Featuring a full 25 Watt output in one square inch of board area, the UEI25 series isolated DC/DC converter family offers efficient regulated DC power for printed circuit board mounting. The 0.96" x 1.1" x 0.32" (24.4 x 27.9 x 8.1 mm) converter accepts a 2:1 input voltage range of 36 to 75 Volts DC, ideal for telecom equipment. The industry-standard pinout fits larger 1" x 2" converters. The fixed output voltage is tightly regulated. Applications include small instruments, area-limited microcontrollers, data communications equipment, remote sensor systems, telephone equipment, vehicle and portable electronics. The UEI25 series includes full magnetic and optical isolation with Basic protection up to 2250 Volts DC. For powering digital systems, the outputs Industry standard 0.96" x 1.1" x 0.32" open frame package and pinout Input voltage range of 36-75 Vdc 3.3V, 5V, or 12Vdc fixed output voltages Isolation up to 2250 VDC (basic) Up to 25 Watts total output power with extensive self-protection shutdown features High efficiency synchronous rectifier forward topology up to 91% Stable operation with no required external components Nominal Input (V) offer fast settling to step transients and will accept higher capacitive loads. Excellent ripple and noise specifications assure compatibility to noise-susceptible circuits. For systems requiring controlled startup/shutdown, an external remote On/Off control may use a switch, transistor or digital logic. A wealth of self-protection features avoid both converter and external circuit faults. These include input undervoltage lockout and overtemperature shutdown. The outputs current limit using the "hiccup" autorestart technique and the outputs are short-circuit protected. Additional features include output overvoltage and reverse conduction elimination. The high efficiency offers minimal heat buildup and "no fan" operation. Usable -40 to 85C temperature range (with derating) Certified to UL 60950-1, CAN/CSA-C22.2 No. 60950-1, IEC60950-1, EN60950-1 safety approvals, 2nd edition F1 *TPMBUJPO Barrier +Vin (1) +Vout (3) t4XJUDIJOH External DC Power Source On/Off Control (6) t'JMUFST Controller and Power 5SBOTGFS Open = On $MPTFE0GG 1PTJUJWF MPHJD t$VSSFOU4FOTF Reference and Error Amplifier Trim (4) -Vin (2) -Vout (5) Figure 1. Connection Diagram Typical topology is shown. Murata Power Solutions recommends an external fuse. For full details go to www.murata-ps.com/rohs www.murata-ps.com/support MDC_UEI25W.B10 Page 1 of 24 UEI25 Series Single Output Isolated 25-Watt DC/DC Converters PERFORMANCE SPECIFICATIONS SUMMARY AND ORDERING GUIDE Input Output R/N (mVp-p) Root Models VOUT (V) IOUT Total (A, Power max) (W) Typ. Max. Regulation (Max.) IIN, VIN min. Nom. Range load (V) (V) (mA) IIN, full load (A) Efficiency Line Load Case (inches) Case (mm) 3.3 7.5 25 50 80 0.1% 0.2% 48 36-75 75 0.58 87.0% 89.5% 0.96x1.1x0.32 24.4x27.9x8.1 P85 UEI25-050-D48 5 5 25 50 80 0.1% 0.2% 48 36-75 30 0.57 89.0% 0.96x1.1x0.32 24.4x27.9x8.1 P85 UEI25-120-D48 12 2.1 25.2 95 120 0.1% 0.1% 48 36-75 20 0.6 86.0% 87.5% 0.96x1.1x0.32 24.4x27.9x8.1 P85 UEI25-033-D48 Notes: Please refer to the part number structure for additional options and complete ordering part numbers. Ripple and Noise is shown at 20 MHz bandwidth. All specifications are at nominal line voltage and full load, +25 C. unless otherwise noted. See detailed specifications for full conditions. Min. Typ. Package, C75 91% Pinout Output capacitors are 1 F ceramic in parallel with 10 F electrolytic. The input cap is 4.7 F ceramic, low ESR. I/O caps are necessary for our test equipment and may not be needed for your application. Minimum load is 10% for rated specifications. PART NUMBER STRUCTURE UEI25 - 033 - D48 P M Lx - C Unipolar Output Isolated 25-Watt Series Nominal Output Voltage in Tenths of a Volt Input Voltage Range D48 = 36-75 Vdc RoHS-6 Hazardous Substance Compliance (Does not claim EU RoHS exemption 7b, lead in solder) Pin Length Option (through-hole only) Blank = Std. pin length 0.25 (6.3mm) L1 = 0.110 (2.79mm) L2 = 0.145 (3.68mm) Surface Mount Option Blank = Through-hole mount M = Surface mount (MSL rating 2) On/Off Control Logic: P = Positive N = Negative Special quantity order is required; samples available with standard pin length only. SMT (M) versions not available in sample quantities. Some model number combinations may not be available. See website or contact your local Murata sales representative. www.murata-ps.com/support MDC_UEI25W.B10 Page 2 of 24 UEI25 Series Single Output Isolated 25-Watt DC/DC Converters FUNCTIONAL SPECIFICATIONS - MODEL UEI25-033-D48 Conditions ABSOLUTE MAXIMUM RATINGS Input Voltage, Continuous Input Voltage, Transient Full power operation Operating or non-operating, 100 mS max. duration Input to output None, install external fuse Power on or off, referred to -Vin Minimum Typical/Nominal Maximum Units 0 80 Vdc 0 100 Vdc Isolation Voltage 2250 Vdc Input Reverse Polarity None Vdc On/Off Remote Control 0 15 Vdc Output Power 0 25.25 W Output Current Current-limited, no damage, short-circuit protected 0 7.5 A Storage Temperature Range Vin = Zero (no power) -55 125 C Absolute maximums 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 or recommended. INPUT Operating voltage range Recommended External Fuse Start-up threshold Undervoltage shutdown Overvoltage shutdown Reverse Polarity Protection Internal Filter Type Input current Full Load Conditions Low Line Inrush Transient Output in Short Circuit No Load Standby Mode (Off, UV, OT) Reflected (back) ripple current Pre-biased startup Fast blow Rising input voltage Falling input voltage 36 48 34 32 35.2 34.0 None None LC None, install external fuse Vin = nominal Vin = minimum 0.58 0.79 0.05 50 75 1 30 Monotonic Iout = minimum, unit=ON Measured at input with specified filter External output voltage < Vset 75 1.5 36 35.2 Vdc A Vdc Vdc Vdc Vdc 0.60 0.81 A A A2-Sec. mA mA mA mA, RMS 100 100 2 GENERAL and SAFETY Efficiency Isolation Isolation Voltage Insulation Safety Rating Isolation Resistance Isolation Capacitance Safety Calculated MTBF Calculated MTBF Vin=48V, full load Vin=36V, full load 87 86.5 Input to output, continuous 2250 89.5 87.5 % % Vdc basic 10 Mohm pF 1000 Certified to UL-60950-1, CSA-C22.2 No.60950-1, IEC/EN60950-1, 2nd edition Per MIL-HDBK-217F, ground benign, Tambient=+30C Per Telcordia SR332, issue 1, class 3, ground fixed, Tambient=+40C Yes TBD Hours x 106 2 Hours x 106 DYNAMIC CHARACTERISTICS Fixed Switching Frequency Startup Time Startup Time Dynamic Load Response 300 Power On to Vout regulated Remote ON to Vout regulated 50-75-50% load step, settling time to within 2% of Vout Dynamic load di/dt Dynamic Load Peak Deviation same as above 330 360 50 50 KHz mS mS 180 250 Sec 30 2 100 A/Sec mV 1.2 15 V V mA 15 1.2 V V mA FEATURES and OPTIONS Remote On/Off Control "N" suffix Negative Logic, ON state Negative Logic, OFF state Control Current "P" suffix Positive Logic, ON state Positive Logic, OFF state Control Current ON = Ground pin or external voltage OFF = Pin open or external voltage -0.7 10 1 ON = Pin open or external voltage OFF = Ground pin or external voltage 10 -0.7 1 www.murata-ps.com/support MDC_UEI25W.B10 Page 3 of 24 UEI25 Series Single Output Isolated 25-Watt DC/DC Converters FUNCTIONAL SPECIFICATIONS (CONT.) - MODEL UEI25-033-D48 Conditions OUTPUT Total Output Power Voltage Nominal Output Voltage Setting Accuracy Output Voltage Range Overvoltage Protection Current Output Current Range Minimum Load Current Limit Inception Short Circuit Short Circuit Current Short Circuit Duration (remove short for recovery) Short circuit protection method Regulation Line Regulation Load Regulation Ripple and Noise Temperature Coefficient Maximum Capacitive Loading (10% ceramic, 90% Oscon) Minimum Typical/Nominal Maximum Units See Derating 0.0 25.0 25.25 W No trim At 50% load User-adjustable Via magnetic feedback 3.267 -1 -10 4.2 3.30 3.333 +1 +10 5.7 Vdc % of Vset. % of Vnom. Vdc 0.7575 7.575 10% minimum load 10 7.575 11 A % of Iout A 0.3 A 0.1 0.2 80 % of Vout % of Vout mV pk-pk % of Vnom./C 2000 F 98% of Vnom., after warmup 8.5 5 Hiccup technique, autorecovery Output shorted to ground, no damage Continuous Current limiting Vin=min. to max., Vout=nom., 50% load Iout=min. to max., Vin=48V 5 Hz- 20 MHz BW At all outputs MECHANICAL (Through Hole Models) Outline Dimensions (no baseplate) (Please refer to outline drawing) Weight Cap. ESR=<0.02, full resistive load Conditions 50 0.02 0 Minimum C75 case WxLxH Maximum 0.9x1.1x0.32 22.86x27.9x8.1 0.32 9.07 0.04 1.016 Copper alloy 50 5 Through Hole Pin Diameter Through Hole Pin Material TH Pin Plating Metal and Thickness Typical/Nominal Nickel subplate Gold overplate Units Inches mm Ounces Grams Inches mm -inches -inches ENVIRONMENTAL Operating Ambient Temperature Range Storage Temperature Thermal Protection/Shutdown Electromagnetic Interference Conducted, EN55022/CISPR22 Radiated, EN55022/CISPR22 Relative humidity, non-condensing Altitude With derating, 200 LFM No derating, 200 LFM Vin = Zero (no power) Measured in center External filter is required 115 85 70 125 120 C C C C 90 10,000 3048 Class Class %RH feet meters B B To +85C must derate -1%/1000 feet RoHS rating Notes -40 -40 -55 110 Unless otherwise noted, all specifications are at nominal input voltage, nominal output voltage and full load. General conditions are +25 Celsius ambient temperature, near sea level altitude, natural convection airflow. All models are tested and specified with external parallel 1 F and 10 F multi-layer ceramic output capacitors. The external input capacitor is 4.7 F ceramic. All capacitors are low-ESR types wired close to the converter. These capacitors are necessary for our test equipment and may not be needed in the user's application. Input (back) ripple current is tested and specified over 5 Hz to 20 MHz bandwidth. Input filtering is Cbus=220 F, Cin=33 F and Lbus=12 H. 10 -500 -152 RoHS-6 All models are stable and regulate to specification under minimum (10%) load. Operation under no load will not damage the converter but may increase regulation, output ripple, and noise. The Remote On/Off Control is referred to -Vin. Regulation specifications describe the output voltage changes as the line voltage or load current is varied from its nominal or midpoint value to either extreme. www.murata-ps.com/support MDC_UEI25W.B10 Page 4 of 24 UEI25 Series Single Output Isolated 25-Watt DC/DC Converters FUNCTIONAL SPECIFICATIONS - MODEL UEI25-050-D48 Conditions ABSOLUTE MAXIMUM RATINGS Input Voltage, Continuous Input Voltage, Transient Full power operation Operating or non-operating, 100 mS max. duration Input to output None, install external fuse Power on or off, referred to -Vin Minimum Typical/Nominal Maximum Units 0 80 Vdc 0 100 Vdc Isolation Voltage 2250 Vdc Input Reverse Polarity None Vdc On/Off Remote Control 0 15 Vdc Output Power 0 25.25 W Output Current Current-limited, no damage, short-circuit protected 0 5 A Storage Temperature Range Vin = Zero (no power) -55 125 C Absolute maximums 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 or recommended. INPUT Operating voltage range Recommended External Fuse Start-up threshold Undervoltage shutdown Overvoltage shutdown Reverse Polarity Protection Internal Filter Type Input current Full Load Conditions Low Line Inrush Transient Output in Short Circuit No Load Standby Mode (Off, UV, OT) Reflected (back) ripple current Pre-biased startup Fast blow Rising input voltage Falling input voltage 36 48 34 32 35 33.5 None None LC None, install external fuse Vin = nominal Vin = minimum 0.57 0.76 0.05 50 30 1 30 Monotonic Iout = minimum, unit=ON Measured at input with specified filter External output voltage < Vset 75 1.5 36 34.5 Vdc A Vdc Vdc Vdc Vdc 0.59 0.79 A A A2-Sec. mA mA mA mA, RMS 100 50 3 GENERAL and SAFETY Efficiency Isolation Isolation Voltage Insulation Safety Rating Isolation Resistance Isolation Capacitance Safety Calculated MTBF Calculated MTBF Vin=48V, full load Vin=36V, full load 89 89 Input to output, continuous 2250 91 91 % % Vdc basic 10 Mohm pF 2000 Certified to UL-60950-1, CSA-C22.2 No.60950-1, IEC/EN60950-1, 2nd edition Per MIL-HDBK-217F, ground benign, Tambient=+30C Per Telcordia SR332, issue 1, class 3, ground fixed, Tambient=+40C Yes TBD Hours x 106 2 Hours x 106 DYNAMIC CHARACTERISTICS Fixed Switching Frequency Startup Time Startup Time Dynamic Load Response 300 Power On to Vout regulated Remote ON to Vout regulated 50-75-50% load step, settling time to within 2% of Vout Dynamic load di/dt Dynamic Load Peak Deviation 330 360 50 50 KHz mS mS 2 A/Sec mV 0.7 15 V V mA 15 0.8 V V mA 200 same as above Sec 150 FEATURES and OPTIONS Remote On/Off Control "N" suffix Negative Logic, ON state Negative Logic, OFF state Control Current "P" suffix Positive Logic, ON state Positive Logic, OFF state Control Current ON = Ground pin or external voltage OFF = Pin open or external voltage -0.7 10 1 ON = Pin open or external voltage OFF = Ground pin or external voltage 10 -0.7 1 www.murata-ps.com/support MDC_UEI25W.B10 Page 5 of 24 UEI25 Series Single Output Isolated 25-Watt DC/DC Converters FUNCTIONAL SPECIFICATIONS (CONT.) - MODEL UEI25-050-D48 Conditions OUTPUT Total Output Power Voltage Nominal Output Voltage Setting Accuracy Output Voltage Range Overvoltage Protection Current Output Current Range Minimum Load Current Limit Inception Short Circuit Short Circuit Current Short Circuit Duration (remove short for recovery) Short circuit protection method Regulation Line Regulation Load Regulation Ripple and Noise Temperature Coefficient Maximum Capacitive Loading (10% ceramic, 90% Oscon) Minimum Typical/Nominal Maximum Units See Derating 0.0 25.0 25.25 W No trim At 50% load User-adjustable Via magnetic feedback 4.95 -1 -10 6 5.00 5.05 +1 +10 7.5 Vdc % of Vset. % of Vnom. Vdc 0 5.0 No minimum load 6.8 5.0 7.3 A % of Iout A 0.3 A 0.1 0.2 80 % of Vout % of Vout mV pk-pk % of Vnom./C 2000 F 98% of Vnom., after warmup 5.3 6.5 Hiccup technique, autorecovery Output shorted to ground, no damage Continuous Current limiting Vin=min. to max., Vout=nom., 50% load Iout=min. to max., Vin=48V 5 Hz- 20 MHz BW At all outputs MECHANICAL (Through Hole Models) Outline Dimensions (no baseplate) (Please refer to outline drawing) Weight Cap. ESR=<0.02, full resistive load Conditions 50 0.02 0 Minimum C75 case WxLxH Maximum 0.96x1.1x0.32 24.4x27.9x8.1 0.32 9.07 0.04 1.016 Copper alloy 50 5 Through Hole Pin Diameter Through Hole Pin Material TH Pin Plating Metal and Thickness Typical/Nominal Nickel subplate Gold overplate Units Inches mm Ounces Grams Inches mm -inches -inches ENVIRONMENTAL Operating Ambient Temperature Range Operating Case Temperature Range Storage Temperature Thermal Protection/Shutdown Electromagnetic Interference Conducted, EN55022/CISPR22 Radiated, EN55022/CISPR22 Relative humidity, non-condensing Altitude With derating, 200 LFM No derating, 200 LFM, full power No derating Vin = Zero (no power) Measured in center External filter is required 115 85 82 105 125 120 C C C C C 90 10,000 3048 Class Class %RH feet meters B B To +85C must derate -1%/1000 feet RoHS rating Notes -40 -40 -40 -55 110 Unless otherwise noted, all specifications are at nominal input voltage, nominal output voltage and full load. General conditions are +25 Celsius ambient temperature, near sea level altitude, natural convection airflow. All models are tested and specified with external parallel 1 F and 10 F multi-layer ceramic output capacitors. The external input capacitor is 4.7 F ceramic. All capacitors are low-ESR types wired close to the converter. These capacitors are necessary for our test equipment and may not be needed in the user's application. 10 -500 -152 RoHS-6 Input (back) ripple current is tested and specified over 5 Hz to 20 MHz bandwidth. Input filtering is Cbus=220 F, Cin=33 F and Lbus=12 H. All models are stable and regulate to specification under no load. The Remote On/Off Control is referred to -Vin. Regulation specifications describe the output voltage changes as the line voltage or load current is varied from its nominal or midpoint value to either extreme. www.murata-ps.com/support MDC_UEI25W.B10 Page 6 of 24 UEI25 Series Single Output Isolated 25-Watt DC/DC Converters FUNCTIONAL SPECIFICATIONS - MODEL UEI25-120-D48 Conditions ABSOLUTE MAXIMUM RATINGS Input Voltage, Continuous Input Voltage, Transient Full power operation Operating or non-operating, 100 mS max. duration Input to output None, install external fuse Power on or off, referred to -Vin Minimum Typical/Nominal Maximum Units 0 80 Vdc 0 100 Vdc Isolation Voltage 2250 Vdc Input Reverse Polarity None Vdc On/Off Remote Control 0 15 Vdc Output Power 0 25 W Output Current Current-limited, no damage, short-circuit protected 0 2.1 A Storage Temperature Range Vin = Zero (no power) -55 125 C Absolute maximums 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 or recommended. INPUT Operating voltage range Recommended External Fuse Start-up threshold Undervoltage shutdown Overvoltage shutdown Reverse Polarity Protection Internal Filter Type Input current Full Load Conditions Low Line Inrush Transient Output in Short Circuit No Load Standby Mode (Off, UV, OT) Reflected (back) ripple current Pre-biased startup Fast blow Rising input voltage Falling input voltage 36 48 34 32 35.2 34.0 None None capacitive None, install external fuse Vin = nominal Vin = minimum 0.600 0.809 0.05 50 20 1 30 Monotonic Iout = minimum, unit=ON Measured at input with specified filter External output voltage < Vset 75 1.5 36 35.2 Vdc A Vdc Vdc Vdc Vdc 0.617 0.842 A A A2-Sec. mA mA mA mA, RMS 100 35 2 GENERAL and SAFETY Efficiency Isolation Isolation Voltage Insulation Safety Rating Isolation Resistance Isolation Capacitance Safety Calculated MTBF Calculated MTBF Vin=48V, full load 86.0 Input to output, continuous 2250 87.5 % Vdc basic 10 Mohm pF 1700 Certified to UL-60950-1, CSA-C22.2 No.609501, IEC/EN60950-1 Per MIL-HDBK-217F, ground benign, Tambient=+30C Per Telcordia SR332, issue 1, class 3, ground fixed, Tambient=+40C Yes TBD Hours x 106 2 Hours x 106 DYNAMIC CHARACTERISTICS Fixed Switching Frequency Startup Time Startup Time Dynamic Load Response 295 Power On to Vout regulated Remote ON to Vout regulated 50-75-50% load step, settling time to within 1% of Vout Dynamic load di/dt Dynamic Load Peak Deviation same as above 325 10 10 355 50 50 KHz mS mS 100 200 Sec 250 1 350 A/Sec mV 0.7 15 V V mA 15 0.8 V V mA FEATURES and OPTIONS Remote On/Off Control "N" suffix Negative Logic, ON state Negative Logic, OFF state Control Current "P" suffix Positive Logic, ON state Positive Logic, OFF state Control Current ON = Ground pin or external voltage OFF = Pin open or external voltage -0.7 10 1 ON = Pin open or external voltage OFF = Ground pin or external voltage 10 -0.7 1 www.murata-ps.com/support MDC_UEI25W.B10 Page 7 of 24 UEI25 Series Single Output Isolated 25-Watt DC/DC Converters FUNCTIONAL SPECIFICATIONS (CONT.) - MODEL UEI25-120-D48 Conditions OUTPUT Total Output Power Voltage Nominal Output Voltage Setting Accuracy Output Voltage Range Overvoltage Protection Current Output Current Range Minimum Load Current Limit Inception Short Circuit Short Circuit Current Short Circuit Duration (remove short for recovery) Short circuit protection method Regulation Line Regulation Load Regulation Ripple and Noise Temperature Coefficient Maximum Capacitive Loading (10% ceramic, 90% Oscon) Minimum Typical/Nominal Maximum Units See Derating 0.0 25.2 25.45 W No trim At 50% load User-adjustable Via magnetic feedback 11.88 -1 -10 14 12.00 12.12 +1 +10 22 Vdc % of Vset. % of Vnom. Vdc 0.0 2.1 No minimum load 3 2.1 A 3.4 A 0.1 A 0.075 0.05 120 % of Vout % of Vout mV pk-pk % of Vnom./C 97% of Vnom., after warmup 2.3 19 Hiccup technique, autorecovery within 1.25% of Vout Output shorted to ground, no damage Continuous Current limiting Vin=min. to max., Vout=nom., 50% load Iout=min. to max., Vin=48V 5 Hz- 20 MHz BW At all outputs MECHANICAL (Through Hole Models) Outline Dimensions (no baseplate) (Please refer to outline drawing) Weight Cap. ESR=<0.02, full resistive load Conditions 95 0.02 0 Minimum C75 case WxLxH Maximum 0.96x1.1x0.32 24.38x27.94x8.13 0.32 9.07 0.04 1.016 Copper alloy 50 5 Through Hole Pin Diameter Through Hole Pin Material TH Pin Plating Metal and Thickness 470 Typical/Nominal Nickel subplate Gold overplate F Units Inches mm Ounces Grams Inches mm -inches -inches ENVIRONMENTAL Operating Ambient Temperature Range Storage Temperature Thermal Protection/Shutdown Electromagnetic Interference Conducted, EN55022/CISPR22 Radiated, EN55022/CISPR22 Relative humidity, non-condensing Altitude With derating, 200 LFM Vin = Zero (no power) Measured at hotspot External filter is required 135 85 125 150 C C C 90 10,000 3048 Class Class %RH feet meters B B To +85C must derate -1%/1000 feet RoHS rating Notes -40 -55 130 Unless otherwise noted, all specifications are at nominal input voltage, nominal output voltage and full load. General conditions are +25 Celsius ambient temperature, near sea level altitude, natural convection airflow. All models are tested and specified with external parallel 1 F and 10 F multi-layer ceramic output capacitors. The external input capacitor is 4.7 F ceramic. All capacitors are low-ESR types wired close to the converter. These capacitors are necessary for our test equipment and may not be needed in the user's application. 10 -500 -152 RoHS-6 Input (back) ripple current is tested and specified over 5 Hz to 20 MHz bandwidth. Input filtering is Cbus=220 F, Cin=33 F and Lbus=12 H. All models are stable and regulate to specification under no load. The Remote On/Off Control is referred to -Vin. Regulation specifications describe the output voltage changes as the line voltage or load current is varied from its nominal or midpoint value to either extreme. www.murata-ps.com/support MDC_UEI25W.B10 Page 8 of 24 UEI25 Series Single Output Isolated 25-Watt DC/DC Converters UEI25-033-D48 PERFORMANCE DATA Maximum Current Temperature Derating @sea level (airflow is from input to output) 8 Output Current (A ( mps) Efficiency (%) Efficiency vs. Line Voltage and Load Current @ 25C 92 87 82 77 72 67 62 57 52 47 42 37 32 27 22 17 12 7 Vin = 36V Vin = 48V Vin = 60V Vin = 75V 0.33 to 2.0 m/s (65 to 400 LFM) 0.33 m/s (65 LFM) Vin = 36V, 48V, and 60V 0.5 m/s (100 LFM) 0. 1.0 to 2.0 m/s (200 to 400 LFM) Vin = 75V 7 6 5 30 0.2 0.7 1.2 1.7 2.2 2.7 3.2 3.7 4.2 4.7 5.2 5.7 6.2 6.7 7.2 35 40 45 50 55 60 65 A bient Temperature (C) Am 70 75 80 85 7.7 Load Current (Amps) Thermal image with "hot spot" at full load current with 63C ambient, air flowing at minimal rate of 65 LFM. Air is flowing across the converter from +Vo to -Vo at 48V input. Identifiable and recommended maximum value to be verified in application. On/Off ENABLE DELAY (Vin=48, Vout=nom, Iout=7.5A, Cload=0uF, Ta=+25C., ScopeBW=20Mhz) Trace 1= Enable. Trace 4=Vout On/Off ENABLE DELAY (Vin=48, Vout=nom, Iout=.7575mA, Cload=0uF, Ta=+25C., ScopeBW=20Mhz) Trace 1= Enable. Trace 4=Vout www.murata-ps.com/support MDC_UEI25W.B10 Page 9 of 24 UEI25 Series Single Output Isolated 25-Watt DC/DC Converters UEI25-033-D48 PERFORMANCE DATA, CONTINUED On/Off ENABLE DELAY (Vin=48, Vout=nom, Iout=7.5A, Cload=2000uF, Ta=+25C., ScopeBW=20Mhz) Trace 1= Enable. Trace 4=Vout Step Load Transient Response (Vin=48V, Vout=nom., Iout=50-75-50% of full load, Cload= 1 uFb ceramic || 10uF tantalum, Ta=+25C., ScopeBW=20Mhz) Output Ripple and Noise (Vin=48V, Vout=nom., Iout=7.5A, Cload= 1 uFb ceramic || 10uF tantalum, Ta=+25C., ScopeBW=20Mhz) Output Ripple and Noise (Vin=48V, Vout=nom., Iout=.7575mA, Cload= 1 uFb ceramic || 10uF tantalum, Ta=+25C., ScopeBW=20Mhz) www.murata-ps.com/support MDC_UEI25W.B10 Page 10 of 24 UEI25 Series Single Output Isolated 25-Watt DC/DC Converters UEI25-050-D48 PERFORMANCE DATA Power Dissipation vs. Load Current @ 25C 3.50 92 91 90 89 88 87 86 85 84 83 82 81 80 79 78 77 76 75 3.00 Vin = 36V 2.50 Loss (Watts) ( Efficiency (%) Efficiency vs. Line Voltage and Load Current @ 25C Vin = 48V Vin = 60V Vin = 75V 2.00 1.50 Vin = 36V Vin = 48V 1.00 Vin = 60V Vin = 75V 0.50 1.0 1.0 1.4 1.8 2.2 2.6 3.0 3.4 3.8 4.2 4.6 1.4 1.8 2.2 2.6 3.0 3.4 3.8 4.2 4.6 5.0 Load Current (A ( mps) 5.0 Load Current (Amps) Maximum Current Temperature Derating @sea level (VIN = 36V, 48V, 60V, and 75V, airflow is from pin 1 to pin 3) 5.1 Output Current (A ( mps) 5.0 0.33 to 2.0 m/s (65 to 400 LFM) 4.9 4.8 4.7 4.6 4.5 30 35 40 45 50 55 60 65 70 75 80 85 A bient temperature (C) Am Thermal image with "hot spot" at full load current with 80C ambient, air flowing at minimal rate of 65 LFM. Air is flowing across the converter from +Vo to -Vo at 48V input. Identifiable and recommended maximum value to be verified in application. www.murata-ps.com/support MDC_UEI25W.B10 Page 11 of 24 UEI25 Series Single Output Isolated 25-Watt DC/DC Converters UEI25-050-D48 PERFORMANCE DATA, CONTINUED On/Off Enable Delay (Vin=48V, Vout=nom., Iout=no load, Cload=0 F, Ta=+25C., ScopeBW=20MHz) Trace 1=Enable, Trace 4=Vout On/Off Enable Delay (Vin=48V, Vout=nom., Iout=5A, Cload=0 F, Ta=+25C., ScopeBW=20MHz) Trace 1=Enable, Trace 4=Vout On/Off Enable Delay (Vin=48V, Vout=nom., Iout=5A, Cload=2000 F, Ta=+25C., ScopeBW=20MHz) Trace 1=Enable, Trace 4=Vout Step Load Transient Response (Vin=48V, Vout=nom., Iout=50-75-50% of full load, Cload=1 F ceramic || 10F tantalum, Ta=+25C., ScopeBW=20MHz) Output Ripple and Noise (Vin=48V, Vout=nom., Iout=no load, Cload=1 F ceramic || 10F tantalum, Ta=+25C., ScopeBW=20MHz) Output Ripple and Noise (Vin=48V, Vout=nom., Iout=5A, Cload=1 F ceramic || 10F tantalum, Ta=+25C., ScopeBW=20MHz) www.murata-ps.com/support MDC_UEI25W.B10 Page 12 of 24 UEI25 Series Single Output Isolated 25-Watt DC/DC Converters UEI25-120-D48 PERFORMANCE DATA Efficiency vs. Line Voltage and Load Current @ 25C Power Dissipation vs. Load Current @ 25C 89 4.46 88 3.96 87 3.46 85 Loss (Watts) ( Efficiency (%) 86 Vin = 36V Vin = 48V 84 Vin = 60V Vin = 75V 83 2.96 2.46 1.96 Vin = 36V 82 Vin = 48V 1.46 81 Vin = 60V Vin = 75V 80 0.96 79 0.46 0.4 78 0.4 0.6 0.8 0.9 1.1 1.3 1.4 1.6 1.8 1.9 0.6 0.8 0.9 1.1 1.3 1.4 1.6 1.8 1.9 2.1 Load Current (A ( mps) 2.1 Load Current (Amps) Maximum Current Temperature Derating @sea level (VIN = 48V, airflow is from pin 1 to pin 3) 2.25 2.2 2.2 2.175 2.15 Output Current (A ( mps) Output Current (A ( mps) Maximum Current Temperature Derating @sea level (VIN = 36V, airflow is from pin 1 to pin 3) 0.33 m/s (65 LFM) 0.5 m/s (100 LFM) 1.0 m/s (200 LFM) 1.5 m/s (300 ( LFM)) 2.1 2.05 2.0 1.95 2.15 0.33 m/s (65 LFM) 0.5 m/s (100 LFM) 1.0 m/s (200 LFM) 2.125 2.1 2.075 2.05 2.025 1.9 65 70 75 80 85 A bient temperature (C) Am Maximum Current Temperature Derating @sea level (VIN = 60V, airflow is from pin 1 to pin 3) 2 65 70 75 A bient temperature (C) Am 80 85 Thermal image with "hot spot" at full load current with 65C ambient, air flowing at minimal rate of 65 LFM. Air is flowing across the converter from +Vo to -Vo at 48V input. Identifiable and recommended maximum value to be verified in application. 2.2 Output Current (A ( mps) 2.175 2.15 0.33 m/s (65 LFM) 0.5 m/s (100 LFM) 1.0 m/s (200 LFM) 2.125 2.1 2.075 2.05 2.025 2 65 70 75 A bient temperature (C) Am 80 85 www.murata-ps.com/support MDC_UEI25W.B10 Page 13 of 24 UEI25 Series Single Output Isolated 25-Watt DC/DC Converters UEI25-120-D48 PERFORMANCE DATA, CONTINUED Maximum Current Temperature Derating @sea level (VIN = 75V, airflow is from pin 1 to pin 3) On/Off ENABLE DELAY (Vin=48, Vout=nom, Iout=0A, Cload=0uF, Ta=+25C., ScopeBW=20Mhz) Trace 1= Enable. Trace 4=Vout 2.2 Output Current (A ( mps) 2.15 2.1 0.33 m/s (65 LFM) 0.5 m/s (100 LFM) 1.0 m/s (200 LFM) 1.5 m/s ((300 LF M)) 2.05 1.95 1.9 65 70 75 80 85 A bient temperature (C) Am On/Off ENABLE DELAY (Vin=48, Vout=nom, Iout=2.1A, Cload=0uF, Ta=+25C., ScopeBW=20Mhz) Trace 1= Enable. Trace 4=Vout On/Off ENABLE DELAY (Vin=48, Vout=nom, Iout=2.1A, Cload=2000uF, Ta=+25C., ScopeBW=20Mhz) Trace 1= Enable. Trace 4=Vout Stepload Transient Response (Vin = 48V, Iout = 25-75-25% of Imax, Cout = 1&10F, Ta = +25C, Scope BW = 20MHz) Output Ripple and Noise (Vin=48V, Iout = 2.1A, Cout = 1&10F, Ta = +25C, Scope BW = 20MHz) www.murata-ps.com/support MDC_UEI25W.B10 Page 14 of 24 UEI25 Series Single Output Isolated 25-Watt DC/DC Converters MECHANICAL SPECIFICATIONS, OPEN FRAME THROUGH-HOLE MOUNT Dimensions are in inches (mm shown for ref. only). Third Angle Projection Case 75 24.4 0.96 Tolerances (unless otherwise specified): .XX 0.02 (0.5) .XXX 0.010 (0.25) Angles 1 PIN #1 Components are shown for reference only. 27.9 1.10 INPUT/OUTPUT CONNECTIONS Pin Function P85 1 TOP VIEW SIDE VIEW MOUNTING PLANE .040.002 PIN DIAMETER .071 .002 SHOULDER DIAMETER 6X AT PINS 1-6 #3 #2 #4 -Vout 6 On/Off Control* 10.16 0.400 CL 10.16 0.400 6.3 0.25 0.30 [7.62] #6 Output Trim 5 0.475 [12.07] REF RECOMMENDED PRI-SEC BARRIER #1 4 END VIEW 20.32 0.800 0.58 [14.7] 0.15 TYP [3.8] 0.41 [10.4] 5.08 0.200 +Vout These converters are plug-compatible to competitive units. In case of pinout numbering inconsistency, follow the pin FUNCTION, not the pin number when laying out your PC board. BOTTOM VIEW CL -Vin 3 *The Remote On/Off can be provided with either positive (P suffix) or negative (N suffix) logic 8.1 0.32 MAX 2.54 0.100 +Vin 2 10.16 0.400 CL #5 Standard pin length is shown. Please refer to the Ordering Guide for alternate pin lengths. www.murata-ps.com/support MDC_UEI25W.B10 Page 15 of 24 UEI25 Series Single Output Isolated 25-Watt DC/DC Converters SHIPPING TRAYS AND BOXES, THROUGH-HOLE MOUNT Anti-static foam Label Label Each tray is 6 x 5 units (30 units per tray) SHIPPING TRAY DIMENSIONS UEI modules are supplied in a 30-piece (6 x 5) shipping tray. The tray is an anti-static closed-cell polyethylene foam. Dimensions are shown below. 6.4 Typ 28.4 Typ 6.4 Typ [9.92] 252.0 [9.92] 252.0 18.0 5x 38.1 25.4 Typ 190.5 Ref R 6.4 Typ A 252.0 Ref A 9.5 deep Ref 4x 44.5 22.9 252.0 Ref 177.8 Ref 19.1 Ref 9.5 [.38 in] Pocket Depth 19.1 [.75 in] SECTION A-A Notes: 1. Material: Dow 220 antistat ethafoam (Density: 34-35 kg/m3) 2. Dimensions: 252 x 252 x 19.1 mm 6 x 5 array (30 per tray) 3. All dimensions in millimeters [inches] 4. Tolerances unless otherwise specified: +1/-0 www.murata-ps.com/support MDC_UEI25W.B10 Page 16 of 24 UEI25 Series Single Output Isolated 25-Watt DC/DC Converters MECHANICAL SPECIFICATIONS, SURFACE MOUNT (MSL RATING 2) Dimensions are in inches (mm shown for ref. only). Third Angle Projection Case 75 TOP VIEW PIN #1 Tolerances (unless otherwise specified): .XX 0.02 (0.5) .XXX 0.010 (0.25) Angles 1 24.4 0.96 Components are shown for reference only. INPUT/OUTPUT CONNECTIONS Pin Function P85 1 27.9 1.10 SIDE VIEW -Vin 3 +Vout 4 Output Trim 5 -Vout 6 On/Off Control* *The Remote On/Off can be provided with either positive (P suffix) or negative (N suffix) logic MOUNTING PLANE These converters are plug-compatible to competitive units. In case of pinout numbering inconsistency, follow the pin FUNCTION, not the pin number when laying out your PC board. 0.093 [2.4] TYP BOTTOM VIEW END VIEW 20.32 0.800 0.58 [14.7] 0.15 TYP [3.8] 2.54 0.100 #3 CL #1 #2 #4 0.30 [7.62] #6 0.34 [8.64] MAX RECOMMENDED PRI-SEC BARRIER 0.41 [10.4] 5.08 0.200 +Vin 2 10.16 0.400 #5 10.16 0.400 CL 10.16 0.400 0.093 [2.4] 0.13 [3.3] REF CL www.murata-ps.com/support MDC_UEI25W.B10 Page 17 of 24 UEI25 Series Single Output Isolated 25-Watt DC/DC Converters RECOMMENDED SMT PAD LAYOUT [20.32] 0.800 6X [2.60 0.25] .102 .010 6 [2.54] 0.100 INPUT/OUTPUT CONNECTIONS Pin Function P85 5 2 [10.16] 0.400 4 1 [2.54] 0.100 1 CL [25.4] 1.00 [10.16] 0.400 3 +Vin 2 -Vin 3 +Vout 4 Output Trim 5 -Vout 6 On/Off Control* *The Remote On/Off can be provided with either positive (P suffix) or negative (N suffix) logic CL [29.0] 1.14 SURFACE MOUNT TAPE AND REEL INFORMATION (MSL RATING 2) PACKAGING CONFORMS TO EIA-481 CONVERTERS SHIPPING IN QUANTITIES OF 100 PER REEL NOTE: The SMT package has an MSL 2 rating. 3.00 0.118 56.0 2.20 2.00 0.079 23.10 0.909 32.00 1.260 Pitch 13.0 5.0mm Nozzle Pick & Place Location Feed (unwind) direction Cover Tape R.256 Dimensions in inches [mm] 9.27 0.365 www.murata-ps.com/support MDC_UEI25W.B10 Page 18 of 24 UEI25 Series Single Output Isolated 25-Watt DC/DC Converters TECHNICAL NOTES Input Fusing Certain applications and/or safety agencies may require fuses at the inputs of power conversion components. Fuses should also be used when there is the possibility of sustained input voltage reversal which is not current-limited. For greatest safety, we recommend a fast blow fuse installed in the ungrounded input supply line. The installer must observe all relevant safety standards and regulations. For safety agency approvals, install the converter in compliance with the end-user safety standard. Input Reverse-Polarity Protection If the input voltage polarity is reversed, an internal diode will become forward biased and likely draw excessive current from the power source. If this source is not current-limited or the circuit appropriately fused, it could cause permanent damage to the converter. Input Under-Voltage Shutdown and Start-Up Threshold Under normal start-up conditions, converters will not begin to regulate properly until the rising input voltage exceeds and remains at the Start-Up Threshold Voltage (see Specifications). Once operating, converters will not turn off until the input voltage drops below the Under-Voltage Shutdown Limit. Subsequent restart will not occur until the input voltage rises again above the Start-Up Threshold. This built-in hysteresis prevents any unstable on/off operation at a single input voltage. Users should be aware however of input sources near the Under-Voltage Shutdown whose voltage decays as input current is consumed (such as capacitor inputs), the converter shuts off and then restarts as the external capacitor recharges. Such situations could oscillate. To prevent this, make sure the operating input voltage is well above the UV Shutdown voltage AT ALL TIMES. Start-Up Delay Assuming that the output current is set at the rated maximum, the Vin to Vout StartUp Delay (see Specifications) is the time interval between the point when the rising input voltage crosses the Start-Up Threshold and the fully loaded regulated output voltage enters and remains within its specified regulation band. Actual measured times will vary with input source impedance, external input capacitance, input voltage slew rate and final value of the input voltage as it appears at the converter. These converters include a soft start circuit to moderate the duty cycle of the PWM controller at power up, thereby limiting the input inrush current. The On/Off Remote Control interval from inception to VOUT regulated assumes that the converter already has its input voltage stabilized above the Start-Up Threshold before the On command. The interval is measured from the On command until the output enters and remains within its specified regulation band. The specification assumes that the output is fully loaded at maximum rated current. Input Source Impedance These converters will operate to specifications without external components, assuming that the source voltage has very low impedance and reasonable input voltage regulation. Since real-world voltage sources have finite impedance, performance is improved by adding external filter components. Sometimes only a small ceramic capacitor is sufficient. Since it is difficult to totally characterize all applications, some experimentation may be needed. Note that external input capacitors must accept high speed switching currents. Because of the switching nature of DC/DC converters, the input of these converters must be driven from a source with both low AC impedance and adequate DC input regulation. Performance will degrade with increasing input inductance. Excessive input inductance may inhibit operation. The DC input regulation specifies that the input voltage, once operating, must never degrade below the Shut-Down Threshold under all load conditions. Be sure to use adequate trace sizes and mount components close to the converter. I/O Filtering, Input Ripple Current and Output Noise All models in this converter series are tested and specified for input reflected ripple current and output noise using designated external input/output components, circuits and layout as shown in the figures below. External input capacitors (CIN in the figure) serve primarily as energy storage elements, minimizing line voltage variations caused by transient IR drops in the input conductors. Users should select input capacitors for bulk capacitance (at appropriate frequencies), low ESR and high RMS ripple current ratings. In the figure below, the CBUS and LBUS components simulate a typical DC voltage bus. Your specific system configuration may require additional considerations. Please note that the values of CIN, LBUS and CBUS may vary according to the specific converter model. TO OSCILLOSCOPE VIN + - + - CURRENT PROBE 1 +VIN LBUS CBUS CIN 2 -VIN CIN = 33F, ESR < 700m @ 100kHz CBUS = 220F, ESR < 100m @ 100kHz LBUS = 12H Figure 2. Measuring Input Ripple Current In critical applications, output ripple and noise (also referred to as periodic and random deviations or PARD) may be reduced by adding filter elements such as multiple external capacitors. Be sure to calculate component temperature rise from reflected AC current dissipated inside capacitor ESR. Floating Outputs Since these are isolated DC/DC converters, their outputs are "floating" with respect to their input. The essential feature of such isolation is ideal ZERO CURRENT FLOW between input and output. Real-world converters however do exhibit tiny leakage currents between input and output (see Specifications). These leakages consist of both an AC stray capacitance coupling component and a DC leakage resistance. When using the isolation feature, do not allow the isolation voltage to exceed specifications. Otherwise the converter may be damaged. Designers will normally use the negative output (-Output) as the ground return of the load circuit. You can however use the positive output (+Output) as the ground return to effectively reverse the output polarity. www.murata-ps.com/support MDC_UEI25W.B10 Page 19 of 24 UEI25 Series Single Output Isolated 25-Watt DC/DC Converters CAUTION: If you exceed these Derating guidelines, the converter may have an unplanned Over Temperature shut down. Also, these graphs are all collected near Sea Level altitude. Be sure to reduce the derating for higher altitude. +VOUT C1 C2 SCOPE RLOAD -VOUT C1 = 1F C2 = 10F LOAD 2-3 INCHES (51-76mm) FROM MODULE Figure 3. Measuring Output Ripple and Noise (PARD) Minimum Output Loading Requirements These converters employ a synchronous rectifier design topology. All models regulate within specification and are stable from 0% load to full load conditions, unless otherwise specified. Operation under no load will not damage the converter but might, however, slightly increase regulation, output ripple, and noise. Thermal Shutdown To protect against thermal over-stress, these converters include thermal shutdown circuitry. If environmental conditions cause the temperature of the DC/ DC's to rise above the Operating Temperature Range up to the shutdown temperature, an on-board electronic temperature sensor will power down the unit. When the temperature decreases below the turn-on threshold, the converter will automatically restart. There is a small amount of hysteresis to prevent rapid on/off cycling. CAUTION: If you operate too close to the thermal limits, the converter may shut down suddenly without warning. Be sure to thoroughly test your application to avoid unplanned thermal shutdown. Temperature Derating Curves The graphs in the performance data section illustrate typical operation under a variety of conditions. The Derating curves show the maximum continuous ambient air temperature and decreasing maximum output current which is acceptable under increasing forced airflow measured in Linear Feet per Minute ("LFM"). Note that these are AVERAGE measurements. The converter will accept brief increases in temperature and/or current or reduced airflow as long as the average is not exceeded. Note that the temperatures are of the ambient airflow, not the converter itself which is obviously running at higher temperature than the outside air. Also note that "natural convection" is defined as very low flow rates which are not using fan-forced airflow. Depending on the application, "natural convection" is usually about 30-65 LFM but is not equal to still air (0 LFM). Murata Power Solutions makes Characterization measurements in a closed cycle wind tunnel with calibrated airflow. We use both thermocouples and an infrared camera system to observe thermal performance. As a practical matter, it is quite difficult to insert an anemometer to precisely measure airflow in most applications. Sometimes it is possible to estimate the effective airflow if you thoroughly understand the enclosure geometry, entry/exit orifice areas and the fan flowrate specifications. Output Overvoltage Protection (OVP) This converter monitors its output voltage for an over-voltage condition using an on-board electronic comparator. The signal is optically coupled to the primary side PWM controller. If the output exceeds OVP limits, the sensing circuit will power down the unit, and the output voltage will decrease. After a time-out period, the PWM will automatically attempt to restart, causing the output voltage to ramp up to its rated value. It is not necessary to power down and reset the converter for this automatic OVP-recovery restart. If the fault condition persists and the output voltage climbs to excessive levels, the OVP circuitry will initiate another shutdown cycle. This on/off cycling is referred to as "hiccup" mode. Output Fusing The converter is extensively protected against current, voltage and temperature extremes. However, your application circuit may need additional protection. In the extremely unlikely event of output circuit failure, excessive voltage could be applied to your circuit. Consider using an appropriate external protection. Output Current Limiting As soon as the output current increases to approximately its overcurrent limit, the DC/DC converter will enter a current-limiting mode. The output voltage will decrease proportionally with increases in output current, thereby maintaining a somewhat constant power output. This is commonly referred to as power limiting. Current limiting inception is defined as the point at which full power falls below the rated tolerance. See the Performance/Functional Specifications. Note particularly that the output current may briefly rise above its rated value. This enhances reliability and continued operation of your application. If the output current is too high, the converter will enter the short circuit condition. Output Short Circuit Condition When a converter is in current-limit mode, the output voltage will drop as the output current demand increases. If the output voltage drops too low, the magnetically coupled voltage used to develop PWM bias voltage will also drop, thereby shutting down the PWM controller. Following a time-out period, the PWM will restart, causing the output voltage to begin rising to its appropriate value. If the short-circuit condition persists, another shutdown cycle will initiate. This on/off cycling is called "hiccup mode." The hiccup cycling reduces the average output current, thereby preventing excessive internal temperatures. Trimming the Output Voltage The Trim input to the converter allows the user to adjust the output voltage over the rated trim range (please refer to the Specifications). In the trim equations and circuit diagrams that follow, trim adjustments use a single fixed resistor connected between the Trim input and either Vout pin. Trimming resistors should have a low temperature coefficient (100 ppm/C or less) and be mounted close to the converter. Keep leads short. If the trim function is not used, leave the trim unconnected. With no trim, the converter will exhibit its specified output voltage accuracy. www.murata-ps.com/support MDC_UEI25W.B10 Page 20 of 24 UEI25 Series Single Output Isolated 25-Watt DC/DC Converters There are two CAUTIONs to observe for the Trim input: There are two CAUTIONs for the On/Off Control: CAUTION: To avoid unplanned power down cycles, do not exceed EITHER the maximum output voltage OR the maximum output power when setting the trim. If the output voltage is excessive, the OVP circuit may inadvertantly shut down the converter. If the maximum power is exceeded, the converter may enter current limiting. If the power is exceeded for an extended period, the converter may overheat and encounter overtemperature shut down. CAUTION: Be careful of external electrical noise. The Trim input is a senstive input to the converter's feedback control loop. Excessive electrical noise may cause instability or oscillation. Keep external connections short to the Trim input. Use shielding if needed. Trim Up 12775 VO - 3.3 - 2050 RTDOWN () = ON/OFF CONTROL 5110 x (Vo -2.5) 3.3 - VO 12775 VO - 5 - 2050 RTDOWN () = 5 - VO - 2050 UEI25-120-D48 25000 VO - 12 - 5110 <Connect trim resistor between Trim and -Vout> RTDOWN () = RTRIM DOWN -VOUT -VIN 5110 x (Vo -2.5) Figure 4. Trim adjustments to decrease Output Voltage using a Fixed Resistor +VOUT +VIN 10000 (Vo-2.5) 12 - VO LOAD TRIM - 2050 UEI25-050-D48 RTUP () = +VOUT Trim Down UEI25-033-D48 RTUP () = CAUTION: Do not apply voltages to the On/Off pin when there is no input power voltage. Otherwise the converter may be permanently damaged. +VIN Trim Equations RTUP () = CAUTION: While it is possible to control the On/Off with external logic if you carefully observe the voltage levels, the preferred circuit is either an open drain/open collector transistor or a relay (which can thereupon be controlled by logic). The On/Off prefers to be set at approx. +15V (open pin) for the ON state, assuming positive logic. - 5110 <Connect trim resistor between Trim and +Vout> Where Vo = Desired output voltage. Adjustment accuracy is subject to resistor tolerances and factory-adjusted output accuracy. Mount trim resistor close to converter. Use short leads. Remote On/Off Control On the input side, a remote On/Off Control can be specified with either positive or negative logic as follows: ON/OFF CONTROL TRIM LOAD R TRIM UP -VIN -VOUT Figure 5. Trim adjustments to increase Output Voltage using a Fixed Resistor +VCC Positive: Models equipped with Positive Logic are enabled when the On/Off pin is left open or is pulled high to +15VDC with respect to -VIN. An internal bias current causes the open pin to rise to +VIN. Positive-logic devices are disabled when the On/Off is grounded or brought to within a low voltage (see Specifications) with respect to -VIN. Negative: Models with negative logic are on (enabled) when the On/Off is grounded or brought to within a low voltage (see Specifications) with respect to -VIN. The device is off (disabled) when the On/Off is left open or is pulled high to +15VDC Max. with respect to -VIN. ON/OFF CONTROL -VIN Figure 6. Driving the On/Off Control Pin (suggested circuit) Dynamic control of the On/Off function should be able to sink the specified signal current when brought low and withstand specified voltage when brought high. Be aware too that there is a finite time in milliseconds (see Specifications) between the time of On/Off Control activation and stable, regulated output. This time will vary slightly with output load type and current and input conditions. www.murata-ps.com/support MDC_UEI25W.B10 Page 21 of 24 UEI25 Series Single Output Isolated 25-Watt DC/DC Converters Emissions Performance Murata Power Solutions measures its products for radio frequency emissions against the EN 55022 and CISPR 22 standards. Passive resistance loads are employed and the output is set to the maximum voltage. If you set up your own emissions testing, make sure the output load is rated at continuous power while doing the tests. The recommended external input and output capacitors (if required) are included. Please refer to the fundamental switching frequency. All of this information is listed in the Product Specifications. An external discrete filter is installed and the circuit diagram is shown below. 80 70 60 50 40 30 20 10 0 0.15 1.0 10.0 30.0 MHz UUT L2 V+ C1 AV Resistive Load C4 Black QP 90 Graph 2. Conducted emissions performance with filter, Negative Line, CISPR 22, Class B, full load, for UEI25-050-D48NM-C Test Card DC Source dBV 100 C2 C3 Vin+ Vout+ Resistive Load inside a metal container C6 L1 dBV 100 QP Average 90 80 V- Vin- Vout- 70 60 50 40 C5 30 Figure 7. Conducted Emissions Test Circuit 20 10 0 0.15 [1] Conducted Emissions Parts List Reference L1 L2 C1, C2 C3 C4, C5 C6 Part Number Description Vendor PE-62913 NC VZ Series VZ Series Unknown VZ Series 1mH, 6A 4.7uH, 3.6A Electrolytic Capacitor 22ufd, 100V Qty 2 - Electrolytic Capacitor 22ufd, 100V 3.3nF, 1500V Electrolytic Capacitor 22ufd, 100V Pulse Murata Panasonic Panasonic Unknown Panasonic 1.0 10.0 30.0 MHz Graph 3. Conducted emissions performance without filter, Negative Line, CISPR 22, Class B, full load, for UEI25-050-D48NM-C dBV 100 QP AV 90 80 70 [2] Conducted Emissions Test Equipment Used Rohde & Schwarz EMI Test Receiver (9KHz - 1000MHz) ESPC 60 50 40 Rohde & Schwarz Software ESPC-1 Ver. 2.20 30 OHMITE 25W - 1 Ohm resistor combinations 20 10 DC Source Programmable DC Power Supply Model 62012P-100-50 0 0.15 [3] Conducted Emissions Test Results dBV 100 QP 1.0 10.0 30.0 MHz Graph 4. Conducted emissions performance with filter, Negative Line, CISPR 22, Class B, full load, for UEI25-120-D48P-C AV 90 80 70 [4] Layout Recommendations Most applications can use the filtering which is already installed inside the converter or with the addition of the recommended external capacitors. For greater emissions suppression, consider additional filter components and/or shielding. Emissions performance will depend on the user's PC board layout, the chassis shielding environment and choice of external components. 60 50 40 30 20 10 0 0.15 1.0 10.0 30.0 MHz Graph 1. Conducted emissions performance with filter, Negative Line, CISPR 22, Class B, full load, for UEI25-033-D48PM-C Since many factors affect both the amplitude and spectra of emissions, we recommend using an engineer who is experienced at emissions suppression. www.murata-ps.com/support MDC_UEI25W.B10 Page 22 of 24 UEI25 Series Single Output Isolated 25-Watt DC/DC Converters Vertical Wind Tunnel IR Transparent optical window Unit under test (UUT) Variable speed fan 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. The system includes a precision low flow-rate anemometer, variable speed fan, power supply input and load controls, temperature gauges, and adjustable heating element. The IR camera monitors the thermal performance of the Unit Under Test (UUT) under static steady-state conditions. A special optical port is used which is transparent to infrared wavelengths. IR Video Camera Heating element Precision low-rate anemometer 3" below UUT Ambient temperature sensor Airflow collimator Figure 8. Vertical Wind Tunnel 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 airflow studies are possible by rotation of this carrier board since there are often significant differences in the heat dissipation in the two airflow directions. The combination of adjustable airflow, adjustable ambient heat, and adjustable 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 to the UUT by minimizing airflow turbulence. Such turbulence influences the effective heat transfer characteristics and gives false readings. Excess turbulence removes more heat from some surfaces and less heat from others, possibly causing uneven overheating. 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 that power supplies are tested in real-world conditions. www.murata-ps.com/support MDC_UEI25W.B10 Page 23 of 24 UEI25 Series Single Output Isolated 25-Watt DC/DC Converters Through-hole Soldering Guidelines SMT Reflow Soldering Guidelines Murata Power Solutions recommends the TH soldering specifications below when installing these converters. These specifications vary depending on the solder type. Exceeding these specifications may cause damage to the product. Your production environment may differ; therefore please thoroughly review these guidelines with your process engineers. The surface-mount reflow solder profile shown below is suitable for SAC305 type leadfree solders. This graph should be used only as a guideline. Many other factors influence the success of SMT reflow soldering. Since your production environment may differ, please thoroughly review these guidelines with your process engineers. Wave Solder Operations for through-hole mounted products (THMT) For Sn/Ag/Cu based solders: Maximum Preheat Temperature 115 C. Maximum Pot Temperature 270 C. Maximum Solder Dwell Time 7 seconds For Sn/Pb based solders: Maximum Preheat Temperature 105 C. Maximum Pot Temperature 250 C. Maximum Solder Dwell Time 6 seconds Murata Power Solutions, Inc. 129 Flanders Road, Westborough, MA 01581 U.S.A. ISO 9001 and 14001 REGISTERED 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. Specifi cations are subject to change without notice. (c) 2018 Murata Power Solutions, Inc. www.murata-ps.com/support MDC_UEI25W.B10 Page 24 of 24 Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Murata: UEI25-033-D48P-C UEI25-033-D48N-C UEI25-050-D48P-C UEI25-050-D48N-C UEI25-120-D48P-C UEI25-120D48N-C UEI25-033-D48NM-C UEI25-033-D48PM-C UEI25-050-D48NM-C UEI25-050-D48PM-C UEI25-120-D48NMC UEI25-120-D48PM-C