ISOLATED DC/DC CONVERTERS 24 Vdc/48 Vdc Input 1.2 Vdc - 12 Vdc / 18 A - 3.5 A Outputs, 1/16 Brick Converter Apr. 07, 2011 Bel Power Inc., a subsidiary xRSB-40U Series RoHS Compliant of Bel Fuse Inc. Rev.C Features Isolated Input Under Voltage Lockout Fixed Frequency Output Over Voltage Shutdown High Efficiency OCP/SCP High Power Density Over Temperature Protection Low Cost Wide Input Voltage Output Voltage Trim Positive/Negative Remote Sense Basic Insulation Through Hole and SMT(Option) Remote On/Off Logic (Option) Input Over Voltage Protection Class 1, Category 2, Isolated DC/DC Converter (refer to IPC-9592) UL60950-1 Recognized (UL/cUL) (Pending) Applications Networking Computers and peripherals Telecommunications Description The xRSB-40U series are isolated dc/dc converters that operate from a nominal 24 Vdc or 48 Vdc source. These units will provide up to 40 W of output power from an 18 Vdc - 75 Vdc wide input range. These units are designed to be highly efficient and low cost. Features include remote on/off, over current protection and under voltage lockout. These converters are provided in an industry standard sixteenth brick package. Part Selection Output Voltage 1.2 Vdc 1.5 Vdc Input Voltage 18 Vdc - 75 Vdc Max. Output Current 18 A Max. Output Power 22 W Typical Efficiency 82% Model Number Active Low xRSB-40UV2L Model Number Active High xRSB-40UV20 18 Vdc - 75 Vdc 16 A 24 W 84% xRSB-40UV5L xRSB-40UV50 1.8 Vdc 18 Vdc - 75 Vdc 14 A 25 W 85% xRSB-40UV8L xRSB-40UV80 2.5 Vdc 18 Vdc - 75 Vdc 12 A 30 W 86% xRSB-40U02L xRSB-40U025 3.3 Vdc 18 Vdc - 75 Vdc 10 A 33 W 87.5% xRSB-40U03L xRSB-40U033 5.0 Vdc 18 Vdc - 75 Vdc 8A 40 W 87% xRSB-40U05L xRSB-40U050 12 Vdc 18 Vdc - 75 Vdc 3.5 A 42 W 85% xRSB-40U12L xRSB-40U120 Notes: Add “G” suffix at the end of the model number to indicate Tray Packaging. Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com 1 ISOLATED DC/DC CONVERTERS 24 Vdc/48 Vdc Input 1.2 Vdc - 12 Vdc / 18 A - 3.5 A Outputs, 1/16 Brick Converter Apr. 07, 2011 Bel Power Inc., a subsidiary of Bel Fuse Inc. Part Number Explanation x R SB – 40 U xx x 1 2 3 4 5 6 7 1---Replace”x” with “S” to indicate SMT package, or “0” to indicate through hole package 2---RoHS 6, change “R” to “7” means RoHS 5 3---Series name, 1/16 Brick 4---Series code 5---Input range (18-75V) 6---Output voltage, V2=1.2Vout, V5=1.5Vout, V8=1.8Vout, 02=2.5Vout, 03=3.3Vout, 05=5.0Vout, 12=12Vout 7---Option, “x” of the model part number to be 0-9, A-Z, which will represent the special request of customer. Absolute Maximum Ratings Parameter Input Voltage (continuous) Input Transient Voltage Min Typ Max Unit -0.3 - 80 V - - 100 V -0.3 - 18 V - - 1500 V Ambient Temperature -40 - 85 C Storage Temperature -55 - 125 C Remote On/Off I/O Isolation Voltage Notes 100mS maximum Note: Ratings used beyond the maximum ratings may cause a reliability degradation of the converter or may permanently damage the device. Input Specifications Parameter Min Typ Max Unit Input Voltage Input Current (full load) Vo=1.2 V - 1.8 V Vo=2.5 V - 3.3 V Vo=5.0 V - 12 V Input Current (no load) 18 48 75 V - 60 2.5 3.0 3.5 120 A A A mA Remote Off Input Current - 1 3 mA Input Reflected Ripple Current (pk-pk) - 20 50 mA Input Reflected Ripple Current (rms) - 3 7 mA 78 - 82 V I t Inrush Current Transient - 0.01 0.02 As Turn-on Voltage Threshold 16.6 17.2 17.8 V Turn-off Voltage Threshold 16.2 16.8 17.4 V Input Over Voltage Lockout 2 Notes Tested with simulated source impedance of 15 uH, 5 Hz to 20 MHz; use a 100 uF/100 V electrolytic capacitor with ESR=1 ohm max at 200 kHz at the input. 2 Note: All specifications are typical at nominal input, full load at 25 C unless otherwise stated. Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com 2 ISOLATED DC/DC CONVERTERS 24 Vdc/48 Vdc Input 1.2 Vdc - 12 Vdc / 18 A - 3.5 A Outputs, 1/16 Brick Converter Apr. 07, 2011 Bel Power Inc., a subsidiary of Bel Fuse Inc. Output Specifications Parameter Output Voltage Set Point Min Typ Max Unit 1.182 1.478 1.773 2.463 3.250 4.925 11.750 1.2 1.5 1.8 2.5 3.3 5.0 12 1.218 1.523 1.827 2.538 3.350 5.075 12.250 V V V V V V V Vo=1.2 V - 1.8 V Vo=2.5 V Vo=3.3 V Vo=5.0 V Vo=12 V - 0.5 1.0 3.0 4.0 6.0 3 4 8 9 15 mV mV mV mV mV Vo=1.2 - 2.5 V Vo=3.3 - 5.0 V Vo=12 V - 3 4 9 5 9 18 mV mV mV Regulation Over Temperature(-40 C to +85 C) Vo=1.2 V Vo=1.5 - 1.8 V Vo=2.5 - 3.3 V Vo=5.0 V Vo=12 V - 4 6 9 15 20 9 14 16 30 35 mV mV mV mV mV 0 0 0 0 0 0 0 18 16 14 12 10 8 3.5 A A A A A A A - 0.5 1 As 21 19 17 14 11 8.8 3.7 25 22 20 17 14 10 5 33 26 23 20 16 12.5 6 A A A A A A A Vo=1.2 V - 1.8 V Vo=2.5 V Vo=3.3 V Vo=5.0 V Vo=12 V - 6 10 12 25 30 12 20 25 50 55 mV mV mV mV mV Vo=1.2 V - 1.8 V Vo=2.5 V Vo=3.3 V Vo=5.0 V Vo=12 V - 40 45 55 70 90 70 80 90 120 180 mV mV mV mV mV Vo=1.2 V Vo=1.5 V Vo=1.8 V Vo=2.5 V Vo=3.3 V Vo=5.0 V Vo=12 V Line Regulation Load Regulation Notes Test conditions: Vin=48 V; Io=50% load Output Current Vo=1.2 V Vo=1.5 V Vo=1.8 V Vo=2.5 V Vo=3.3 V Vo=5.0 V Vo=12 V Short Circuit Surge Transient 2 Hiccup mode, auto recovery Current Limit Threshold Vo=1.2 V Vo=1.5 V Vo=1.8 V Vo=2.5 V Vo=3.3 V Vo=5.0 V Vo=12 V Ripple and Noise (rms) Ripple and Noise (pk-pk) Tested at 0-20 MHz BW, with a 1 uF ceramic capacitor and a 10 uF Tantalum capacitor at the output. Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com 3 ISOLATED DC/DC CONVERTERS 24 Vdc/48 Vdc Input 1.2 Vdc - 12 Vdc / 18 A - 3.5 A Outputs, 1/16 Brick Converter Apr. 07, 2011 Bel Power Inc., a subsidiary of Bel Fuse Inc. Output Specifications (continued) Parameter Min Typ Max Unit Turn on Time - 25 50 mS Overshoot at Turn on - 0 5 % 470 470 470 470 330 150 10 - 15000 10000 10000 5600 4700 2200 220 uF uF uF uF uF uF uF - 60 110 mV - 80 150 uS - 60 110 mV Settling Time - 80 150 uS Overshoot - 90 180 mV - 80 150 uS Notes Output Capacitance Vo=1.2 V Vo=1.5 V Vo=1.8 V Vo=2.5 V Vo=3.3 V Vo=5.0 V Vo=12 V Recommend to use AVX TPS series Tantalum capacitor as min capacitor. Transient Response 25% ~ 50% Max Load 50% ~ 25% Max Load 25% ~ 50% Max Load 50% ~ 25% Max Load 25% ~ 50% Max Load 50% ~ 25% Max Load 25% ~ 50% Max Load 50% ~ 25% Max Load 25% ~ 50% Max Load 50% ~ 25% Max Load Overshoot Settling Time Overshoot Settling Time Overshoot Vo=1.2 V Vo=1.5 -1.8 V - 90 180 mV Settling Time - 80 150 uS Overshoot - 180 250 mV - 80 150 uS Settling Time Overshoot Vo=2.5 -3.3 V - 180 250 mV Settling Time - 80 150 uS Overshoot - 250 350 mV - 100 200 uS - 250 350 mV Settling Time - 100 200 uS Overshoot - 400 650 mV - 150 300 mS - 400 650 mV - 150 300 mS Settling Time Overshoot Settling Time Overshoot Settling Time Vo=5.0 V Vo=12 V Test conditions: di/dt = 0.1 A/uS, Vin=48 V, with a 1 uF ceramic capacioor and a Min Capacitance of Tantalum capacitor at the output. Note: All specifications are typical at nominal input, full load at 25°C unless otherwise stated. Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com 4 ISOLATED DC/DC CONVERTERS 24 Vdc/48 Vdc Input 1.2 Vdc - 12 Vdc / 18 A - 3.5 A Outputs, 1/16 Brick Converter Apr. 07, 2011 Bel Power Inc., a subsidiary of Bel Fuse Inc. General Specifications Parameter Min Typ Max Unit Vo=1.2 V Vo=1.5 V Vo=1.8 V Vo=2.5 V Vo=3.3 V Vo=5.0 V Vo=12 V 78 79 81 83 85 85 83 82 84 85 86 87.5 87 85 - % % % % % % % Switching Frequency Vo=1.2 V -12 V Vo=1.8 V 450 500 500 550 550 600 KHz KHz - 3900 - pF Notes Efficiency Isolation Capacitance Over Temperature Protection Output Voltage Trim Range Over Voltage Protection The OTP threshold is set at 125C in non-latch mode, and the module will restart automatically when temperature falls down to 115C. - 125 - C 90 - 110 % Vo - 130 160 % Vo Test conditions: Vin=48 V, full load and short the feedback optocoupler. TBD - Calculated Per Bell Core SR-332 (IO = Nominal; Ta = 25 C) 1.30 x 0.90 x 0.493 33.02 x 22.86 x 12.53 - SRSB-40Uxxx 1.30 x 0.90 x 0.507 33.02 x 22.86 x 12.89 - 0RSB-40Uxxx MTBF Dimensions Inches (L × W × H) Millimeters (L × W × H) Weight Vin=48 V, full load - 14 - g Note: All specifications are typical at 25 C unless otherwise stated. Control Specifications Parameter Remote On/Off Signal Low (Unit On) Signal High (Unit Off) Signal Low (Unit Off) Signal High (Unit On) Current Sink Active Low Active High - Min Typ Max Unit -0.3 - 0.8 V 2.4 - 18 V -0.3 - 0.8 V 2.4 - 18 V 0 - 1 mA Notes When Remote On/Off pin is open, for active low option, unit is off; for active high option, unit is on Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com 5 ISOLATED DC/DC CONVERTERS 24 Vdc/48 Vdc Input 1.2 Vdc - 12 Vdc / 18 A - 3.5 A Outputs, 1/16 Brick Converter Apr. 07, 2011 Bel Power Inc., a subsidiary of Bel Fuse Inc. Output Trim Equations Equations for calculating the trim resistor are shown below (Unit: kΩ). The Trim Down resistor should be connected between the Trim pin and Ground pin. The Trim Up resistor should be connected between the Trim pin and the Vout. Only one of the resistors should be used for any given application. 1) Trim Equations for Vo=1.2 V Vo Rtrimdown Rtrimup 511 10.22 delta Module Rtrimdown (100 delta ) Vo 5.11 313 10.22 0.6125 delta Note: delta Trim GND Vo _ req Vo 100% Vo Vo Vo_req=Desired (trimmed) output voltage [V] Rtrimup Vo=1.202 V Module Trim GND 2) Trim Equations for Vo=1.5 V - 12 V Rtrimdown Rtrimup Note: 511 10.22 delta (100 delta ) Vo 511 626 10.22 1.225 delta delta Vo _ req Vo 100 % Vo Vo_req=Desired (trimmed) output voltage [V] Vo=1.503V, Vo=1.800V, Vo=2.505V, Vo=3.308V, Vo=5.002V, Vo=12.007V Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com 6 ISOLATED DC/DC CONVERTERS 24 Vdc/48 Vdc Input 1.2 Vdc - 12 Vdc / 18 A - 3.5 A Outputs, 1/16 Brick Converter Apr. 07, 2011 Bel Power Inc., a subsidiary of Bel Fuse Inc. Efficiency Data xRSB-40UV2x xRSB-40UV5x 85% 90% 80% 85% 80% 70% 18V 65% 24V 48V 60% 75V EFFICIENCY EFFICIENCY 75% 75% 18V 70% 24V 48V 75V 65% 60% 55% 55% 50% 50% 45% 1.80 45% 4.50 9.00 13.50 18.00 1.6A OUTPUT CURRENT (A) 4A 8A 12A 16A OUTPUT CURRENT (A) xRSB-40U02x xRSB-40UV8x 85% 90% 80% 85% 75% 65% 18V 24V 48V 60% 75V 70% EFFICIENCY EFFICIENCY 90% 80% 18V 75% 70% 24V 48V 65% 75V 55% 60% 50% 55% 45% 1.4A 50% 3.5A 7A 10.5A 1.20 14A 3.00 90% 12.00 90% 85% 85% 80% 18V 75% 24V 48V 70% 75V 65% EFFICIENCY EFFICIENCY 9.00 xRSB-40U05x xRSB-40U03x 80% 18V 75% 70% 24V 48V 65% 75V 60% 60% 55% 55% 50% 50% 1.00 6.00 OUTPUT CURRENT (A) OUTPUT CURRENT (A) 2.50 5.00 7.50 OUTPUT CURRENT (A) 10.00 0.80 2.00 4.00 6.00 8.00 OUTPUT CURRENT (A) Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com 7 ISOLATED DC/DC CONVERTERS 24 Vdc/48 Vdc Input 1.2 Vdc - 12 Vdc / 18 A - 3.5 A Outputs, 1/16 Brick Converter Apr. 07, 2011 Bel Power Inc., a subsidiary of Bel Fuse Inc. Efficiency Data (continued) xRSB-40U12x 90% EFFICIENCY 85% 80% 18V 75% 24V 70% 48V 65% 75V 60% 55% 50% 0.35 0.88 1.75 2.63 3.50 OUTPUT CURRENT (A) Thermal Derating Curves xRSB-40UV2x, Vin=48V xRSB-40UV2x, Vin=24V Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com 8 ISOLATED DC/DC CONVERTERS 24 Vdc/48 Vdc Input 1.2 Vdc - 12 Vdc / 18 A - 3.5 A Outputs, 1/16 Brick Converter Apr. 07, 2011 Bel Power Inc., a subsidiary of Bel Fuse Inc. Thermal Derating Curves (continued) xRSB-40UV5x, Vin=48V xRSB-40UV5x, Vin=24V xRSB-40UV8x, Vin=48V xRSB-40UV8x, Vin=24V xRSB-40U02x, Vin=48V xRSB-40U02x, Vin=24V Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com 9 ISOLATED DC/DC CONVERTERS 24 Vdc/48 Vdc Input 1.2 Vdc - 12 Vdc / 18 A - 3.5 A Outputs, 1/16 Brick Converter Apr. 07, 2011 Bel Power Inc., a subsidiary of Bel Fuse Inc. Thermal Derating Curves (continued) xRSB-40U03x, Vin=48V xRSB-40U03x, Vin=24V xRSB-40U05x, Vin=48V xRSB-40U05x, Vin=24V xRSB-40U12x, Vin=48V xRSB-40U12x, Vin=24V Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com 10 ISOLATED DC/DC CONVERTERS 24 Vdc/48 Vdc Input 1.2 Vdc - 12 Vdc / 18 A - 3.5 A Outputs, 1/16 Brick Converter Apr. 07, 2011 Bel Power Inc., a subsidiary of Bel Fuse Inc. Ripple and Noise Waveforms 48 Vdc input, 1.2 Vdc output 48 Vdc input, 1.8 Vdc output 48 Vdc input, 3.3 Vdc output 48 Vdc input, 1.5 Vdc output 48 Vdc input, 2.5 Vdc output 48 Vdc input, 5.0 Vdc output Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com 11 ISOLATED DC/DC CONVERTERS 24 Vdc/48 Vdc Input 1.2 Vdc - 12 Vdc / 18 A - 3.5 A Outputs, 1/16 Brick Converter Apr. 07, 2011 Bel Power Inc., a subsidiary of Bel Fuse Inc. Ripple and Noise Waveforms (continued) 48 Vdc input, 12 Vdc output Note: Ripple and noise at full load, with external a 1 uF ceramic cap and a 470 uF Tantalum cap for 1.2-1.8V output, with external a 1 uF ceramic cap and a 10 uF Tantalum cap for 2.5V and 12V output, with external a 1 uF ceramic cap and a 220 uF Tantalum cap for 3.3V output, with external a 1 uF ceramic cap and a 100 uF Tantalum cap for 5V output, Ta=25 deg C. Transient Response Waveforms Vout=1.2 V 50% to 25% Load Transients Vout=1.2 V 25% to 50% Load Transients Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com 12 ISOLATED DC/DC CONVERTERS 24 Vdc/48 Vdc Input 1.2 Vdc - 12 Vdc / 18 A - 3.5 A Outputs, 1/16 Brick Converter Apr. 07, 2011 Bel Power Inc., a subsidiary of Bel Fuse Inc. Transient Response Waveforms (continued) Vout=1.5 V 50% to 25% Load Transients Vout=1.5 V 25% to 50% Load Transients Vout=1.8 V 50% to 25% Load Transients Vout=1.8 V 25% to 50% Load Transients Vout=2.5 V 50% to 25% Load Transients Vout=2.5 V 25% to 50% Load Transients Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com 13 ISOLATED DC/DC CONVERTERS 24 Vdc/48 Vdc Input 1.2 Vdc - 12 Vdc / 18 A - 3.5 A Outputs, 1/16 Brick Converter Apr. 07, 2011 Bel Power Inc., a subsidiary of Bel Fuse Inc. Transient Response Waveforms (continued) Vout=3.3 V 50% to 25% Load Transients Vout=3.3 V 25% to 50% Load Transients Vout=5.0 V 50% to 25% Load Transients Vout=5.0 V 25% to 50% Load Transients Vout=12 V 50% to 25% Load Transients Vout=12 V 25% to 50% Load Transients Note: Transient Response at Vin=48 V, di/dt=0.1 A/uS, with external a 1 uF ceramic cap and a 470 uF Tantalum cap for 1.2-1.8V output, with external a 1 uF ceramic cap and a 10 uF Tantalum cap for 2.5V and 12V output, with external a 1 uF ceramic cap and a 220 uF Tantalum cap for 3.3V output, with external a 1 uF ceramic cap and a 100 uF Tantalum cap for 5V output, Ta=25 deg C. Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com 14 ISOLATED DC/DC CONVERTERS 24 Vdc/48 Vdc Input 1.2 Vdc - 12 Vdc / 18 A - 3.5 A Outputs, 1/16 Brick Converter Apr. 07, 2011 Bel Power Inc., a subsidiary of Bel Fuse Inc. Startup Rise Time Startup time Vout=1.2V 100% Load at Vin=48V Rise Time CH1: Vout CH2: Vin Vout=1.2V 100% Load at Vin=48V Startup time Vout=1.5V 100% Load at Vin=48V CH1: Vout CH2: Vin Vout=1.5V 100% Load at Vin=48V Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com 15 ISOLATED DC/DC CONVERTERS 24 Vdc/48 Vdc Input 1.2 Vdc - 12 Vdc / 18 A - 3.5 A Outputs, 1/16 Brick Converter Apr. 07, 2011 Bel Power Inc., a subsidiary of Bel Fuse Inc. Startup (continued) Rise Time Startup time Vout=1.8V 100% Load at Vin=48V Rise Time CH1: Vout CH2: Vin Vout=1.8V 100% Load at Vin=48V Startup time Vout=2.5V 100% Load at Vin=48V CH1: Vout CH2: Vin Vout=2.5V 100% Load at Vin=48V Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com 16 ISOLATED DC/DC CONVERTERS 24 Vdc/48 Vdc Input 1.2 Vdc - 12 Vdc / 18 A - 3.5 A Outputs, 1/16 Brick Converter Apr. 07, 2011 Bel Power Inc., a subsidiary of Bel Fuse Inc. Startup (continued) Rise Time Startup time Vout=3.3V 100% Load at Vin=48V Rise Time CH1: Vout CH2: Vin Vout=3.3V 100% Load at Vin=48V Startup time Vout=5V 100% Load at Vin=48V CH1: Vout CH2: Vin Vout=5V 100% Load at Vin=48V Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com 17 ISOLATED DC/DC CONVERTERS 24 Vdc/48 Vdc Input 1.2 Vdc - 12 Vdc / 18 A - 3.5 A Outputs, 1/16 Brick Converter Apr. 07, 2011 Bel Power Inc., a subsidiary of Bel Fuse Inc. Startup (continued) Rise Time Startup time Vout=12V 100% Load at Vin=48V CH1: Vout CH2: Vin Vout=12V 100% Load at Vin=48V Note: Start up waveform, External 220uF Tantalum Cap and 1uF Ceramic Cap, Ta=25 deg C. Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com 18 ISOLATED DC/DC CONVERTERS 24 Vdc/48 Vdc Input 1.2 Vdc - 12 Vdc / 18 A - 3.5 A Outputs, 1/16 Brick Converter Apr. 07, 2011 Bel Power Inc., a subsidiary of Bel Fuse Inc. SMT Package (SRSB-40Uxxx) Pin Connections Pin Function 1 Vin (+) 2 Remote On/Off 3 Vin (-) 4 Vout (-) 5 Remote Sense (-) 6 Trim 7 Remote Sense (+) 8 Vout (+) Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com 19 ISOLATED DC/DC CONVERTERS 24 Vdc/48 Vdc Input 1.2 Vdc - 12 Vdc / 18 A - 3.5 A Outputs, 1/16 Brick Converter Apr. 07, 2011 Bel Power Inc., a subsidiary of Bel Fuse Inc. Through Hole Package (0RSB-40Uxxx) Pin Connections Pin 1 2 3 4 5 6 7 8 Function Vin (+) Remote On/Off Vin (-) Vout (-) Remote Sense (-) Trim Remote Sense (+) Vout (+) Note: 1) All Pins: Material - Copper Alloy; Finish – 3 micro inches minimum Gold over 50 micro inches minimum Nickel plate. 2) Undimensioned components are shown for visual reference only. 3) All dimensions in inches (mm); Tolerances: x.xx +/-0.02 in. (x.x +/-0.5mm) x.xxx +/-0.010 in. (x.xx +/-0.25mm). Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com 20 ISOLATED DC/DC CONVERTERS 24 Vdc/48 Vdc Input 1.2 Vdc - 12 Vdc / 18 A - 3.5 A Outputs, 1/16 Brick Converter Apr. 07, 2011 Bel Power Inc., a subsidiary of Bel Fuse Inc. Revision History Date Revision Changes Detail Approval 1. Add input transient voltage in absolute maximum ratings. 2011-04-07 C 2. Add input over voltage lockout in input specifications. JZ Wang 3. Add startup waveform. RoHS Compliance Complies with the European Directive 2002/95/EC, calling for the elimination of lead and other hazardous substances from electronic products. 2011 Bel Fuse Inc. Specifications subject to change without notice. 040711 21 CORPORATE FAR EAST EUROPE Bel Fuse Inc. 206 Van Vorst Street Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com Bel Fuse Ltd. 8F/ 8 Luk Hop Street San Po Kong Kowloon, Hong Kong Tel 852-2328-5515 Fax 852-2352-3706 www.belfuse.com Bel Fuse Europe Ltd. Preston Technology Management Centre Marsh Lane, Suite G7, Preston Lancashire, PR1 8UD, U.K. Tel 44-1772-556601 Fax 44-1772-888366 www.belfuse.com