ISOLATED DC/DC CONVERTERS 36 Vdc - 75 Vdc Input, 12 Vdc/5 A Output Bel Power Inc., a subsidiary of Bel Fuse Inc. Apr. 29, 2011 SRSB-50T12C RoHS Compliant PRELIMINARY Rev.A Features Isolated Output Over Voltage Shutdown High Efficiency Over Temperature Protection Fixed Frequency (600 kHz) SCP/OCP High Power Density Basic Insulation Input Under Voltage Lockout Remote On/Off Low Cost Class 2, Category 2, Isolated DC/DC Converter (refer to IPC-9592) UL60950-1 Recognized (UL/cUL) (Pending) Applications Networking Computers and peripherals Telecommunications Description The SRSB-50T12C is an isolated dc/dc converter that operates from a nominal 48 Vdc source. The unit will provide up to 60 W of output power from a nominal 48 Vdc input. The unit is designed to be highly efficient and low cost. Features include remote on/off, over current protection and under-voltage lockout. The converter is provided in an industry standard sixteenth brick package. Part Selection Output Voltage Input Voltage 12 Vdc 36 Vdc - 75 Vdc Max. Output Current 5A Max. Output Power 60 W Typical Efficiency 89% Model Number Active Low SRSB-50T12C Notes: Add “G” suffix at the end of the model number to indicate Tray Packaging. Part Number Explanation S R SB – 50 T 12 C 1 2 3 4 5 6 7 1---Surface Mount 2---RoHS 6, change “R” to “7” means RoHS 5 3---Series name, 1/16 brick 4---Series code 5---Input range (36-75V) 6---Output voltage (12V) 7---Option, “x” of the model part number to be 0-9, A-Z, which will represent the special request of customer. 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 36 Vdc - 75 Vdc Input, 12 Vdc/5 A Output Bel Power Inc., a subsidiary of Bel Fuse Inc. Apr. 29, 2011 Absolute Maximum Ratings Min Typ Max Unit Continuous Input Voltage -0.3 - 80 V Input Transient Voltage -0.3 - 100 V Remote On/Off -0.3 - 18 V Parameter I/O Isolation Voltage Notes 100mS maximum - - 1500 V Ambient Temperature -40 - 85 C Storage Temperature -55 - 125 C Note: Ratings used beyond the maximum ratings may cause a reliability degradation of the converter or may permanently damage the device. Input Specifications Parameter Operating Input Voltage Min 36 Input Current (full load) - - 2.4 A Input Current (no load) - 70 120 mA Remote Off Input Current - 1 3 mA Input Reflected Ripple Current (rms) - 3 7 mA Input Reflected Ripple Current (pk-pk) - 20 50 mA I t Inrush Current Transient - 0.01 0.02 As Turn-on Voltage Threshold 31 32 35 V Turn-off Voltage Threshold 30 31 34 V 2 Typ 48 Max 75 Unit V Notes With simulated source impedance of 15uH, 5Hz to 20MHz; use a 100uF/100V electrolytic capacitor with ESR=1 ohm max, at 200KHz@25°C. 2 Note: All specifications are typical at 25 C unless otherwise stated. Output Specifications Parameter Min Typ Max Unit 11.75 12.00 12.25 V Load Regulation - ±9 ±18 mV Line Regulation - ±10 ±25 mV Regulation Over Temperature (-40deg.C-85deg.C) - ±20 ±35 mV Total Regulation - ±39 ±78 mV Output Ripple and Noise (pk-pk) - 90 180 mV Output Ripple and Noise (rms) - 30 55 mV Output Current Range 0 - 5 A 5.2 6.5 8.5 A Output Voltage Set Point Output DC Current Limit Notes Vin=48 V, Io=50%Load 0-20MHz BW, with a 1µF ceramic capacitor and the minimum external Tantalum cap at output. 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 36 Vdc - 75 Vdc Input, 12 Vdc/5 A Output Bel Power Inc., a subsidiary of Bel Fuse Inc. Apr. 29, 2011 Output Specifications (continued) Parameter Min Typ Max Unit 2 Short Circuit Surge Transient - 0.5 1 As Turn on Time - 35 70 mS Overshoot at Turn on - 0 5 % 22 - 470 uF Output Capacitance Transient Response △V Overshoot 25%~50% of Max Load Settling Time △V 50%~25% of Max Load Overshoot Vo= 12 V Settling Time - 400 650 mV - 150 300 uS - 400 650 mV - 150 300 uS Notes di/dt=0.1A/us, Vin=48Vdc, Ta=25°C, with a 1µF ceramic capacitor and the minimum external Tantalum cap at output. Note: All specifications are typical at nominal input, full load at 25°C unless otherwise stated. General Specifications Parameter Efficiency Switching Frequency Min Typ Max Unit 86 89 - % - 600 - kHz Notes Vin=48 V, full load. Over Temperature Protection - 125 - ℃ The OTP threshold is set at 125°C in non-latch mode, and the module will restart automatically when temperature falls down to 115°C. Over Voltage Protection (Static) - 130 160 % This voltage is achieved by trimming up output slowly. Weight - TBD - g Dimensions Inches (L × W × H) Millimeters (L × W × H) 1.300 x 0.900 x 0.364 33.02 x 22.86 x 9.24 - - - 1500 V 10M - - Ohm - 3900 - pF Isolation characteristics Input to Output Isolation Resistance Isolation Capacitance Note: All specifications are typical 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 3 ISOLATED DC/DC CONVERTERS 36 Vdc - 75 Vdc Input, 12 Vdc/5 A Output Bel Power Inc., a subsidiary of Bel Fuse Inc. Apr. 29, 2011 Efficiency Data 90% 85% EFFICIENCY 80% 75% 36V 70% 48V 75V 65% 60% 55% 50% 0.5A 1.25A 2.5A 3.75A 5A OUTPUT CURRENT (A) Thermal Derating Curve Maximum junction temperature of semiconductors derated to 120 degree C. Derating curve under 48V input range 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 36 Vdc - 75 Vdc Input, 12 Vdc/5 A Output Bel Power Inc., a subsidiary of Bel Fuse Inc. Apr. 29, 2011 Transient Response Waveforms 50%-25% Load Transients at Vin=48 V 25%-50% Load Transients at Vin=48 V Note: Transient response at Vout=12V, di/dt=0.1A/us, External 22uF Tantalum Cap and 1uF Ceramic Cap, and Ta=25 deg C. Ripple and Noise Waveform 48 Vdc input, 12 Vdc/5 A output Note: Ripple and noise at full load, and with a 1uF ceramic cap and a 22 uF Tantalum cap at 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 5 ISOLATED DC/DC CONVERTERS 36 Vdc - 75 Vdc Input, 12 Vdc/5 A Output Bel Power Inc., a subsidiary of Bel Fuse Inc. Apr. 29, 2011 Remote On/Off Parameter Signal Low (Unit On) Signal High (Unit Off) Active Low Current Sink Min -0.3 Typ - Max 0.8 Unit V 2.95 - 18 V 0 - 1 mA Notes The remote on/off pin open, Unit off. Recommended remote on/off circuit for active low Vin+ Vin+ On/off On/off Vin- Vin- Control with open collector/drain circuit Control with photocoupler circuit Vin+ Vin+ On/off On/off Vin- Vin- Vcc Control with logic circuit Permanently on 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 36 Vdc - 75 Vdc Input, Apr. 29, 2011 12 Vdc/5 A Output Bel Power Inc., a subsidiary of Bel Fuse Inc. Mechanical Outline Pin Connections pin# 1 2 3 4 5 function Vin (+) On/Off Vin (-) Vout (-) Vout (+) Note: This module is recommended and compatible with Pb-Free Reflow Soldering and must be soldered using a reflow profile with a peak temperature of no more than 260ºC for less than 5 seconds. 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 7 ISOLATED DC/DC CONVERTERS 36 Vdc - 75 Vdc Input, 12 Vdc/5 A Output Bel Power Inc., a subsidiary of Bel Fuse Inc. Apr. 29, 2011 Revision History Date Version 2010-04-29 PA Changes Detail Approval First release JZ Wang 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. 042911 8 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