ISOLATED DC/DC CONVERTERS 48 VDC Input 12 VDC/8.5 A Output, 1/16 Brick SRCA-08S12L RoHS Compliant Rev.B • Isolated • Input Under Voltage Lockout • Fixed Frequency • Input Over Voltage Shutdown • High Efficiency • OCP/SCP • High Power Density • Over Temperature Protection • Low Cost • Remote On/Off Description The SRCA-08S12L is an isolated DC/DC converter that operates from a nominal 48 VDC source. These converters use a half bridge power train to provide isolation and step down. These units will provide up to 100 W of output power from a nominal 48 VDC input. 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 12 V Input Voltage 36 V - 55 V Max. Output Current 8.5 A Max. Output Power 100 W Typical Efficiency 95% Model Number Active Low SRCA-08S12L Notes: 1. Add “G” suffix at the end of the model number to indicate Tray Packaging. 2. All part numbers above indicate RoHS 6. Change the second letter "R" to "7" for RoHS 5 part numbers. Absolute Maximum Ratings Parameter Input Voltage (continuous) Min -0.3 V Typ - Max 80 V Remote On/Off -0.3 V - 18 V I/O Isolation Voltage - 500 V - Ambient Temperature -40 °C - 85 °C Storage Temperature -40 °C - 125 °C Notes Input Specifications Parameter Min 36 V Typ - Max 55 V Input Current (full load) - - 2.5 A Input Current (no load) - - 120 mA Remote Off Input Current - 4 mA 10 mA Input Reflected Ripple Current (pk-pk) - 40 mA 100 mA Input Reflected Ripple Current (rms) - 10 mA 30 mA I t Inrush Current Transient - 0.039 A s 0.062 A s Input Over Voltage Protection Threshold - 59 V - Input Voltage 2 2 Notes Active Low Tested with simulated source impedance of 10 uH, 5 Hz to 20 MHz; use a 100 uF/100 V electrolytic capacitor and 1 uF/100 V ceramic capacitor at the input. 2 Turn On Voltage Threshold - 35 V - Turn Off Voltage Threshold - 30 V - Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com ISOLATED DC/DC CONVERTERS 48 VDC Input 12 VDC/8.5 A Output, 1/16 Brick Output Specifications Parameter Output Voltage Set Point Min Typ Max Vin=36 V Vin=48 V Vin=55 V 8.8 V 11.8 V 13.5 V - 9V 12 V 13.75 V 4.75 V 9.2 V 12.2 V 13.95 V 5.0 V Vin=36 V Vin=48 V Vin=55 V - 0.6 V 0.6 V 0.6 V 0.8 V 0.8 V 0.8 V - 100 mV 200 mV Output Current 0A - 8.5 A Current Limit Threshold 9A - Line Regulation Notes lout=no load Load Regulation Regulation Over Temperature (-40 °C to +85 °C) 14 A 2 2 Short Circuit Surge Transient - 1.3 A s 2.1 A s Ripple and Noise (rms) - 30 mV 60 mV Ripple and Noise (pk-pk) - 90 mV 150 mV Turn on Time - 10 mS 20 mS - 0% 3% 0 uF - 2000 uF Overshoot at Turn on Output Capacitance Test conditions: 0-20 MHz BW, with a 1 uF ceramic capacitor and a 10 uF Tantalum capacitor at the output; Vin=48 V. Transient Response 50% ~ 75% Max Load 75% ~ 50% Max Load Overshoot Settling Time Overshoot Vin=48V Settling Time 150 mV 350 mV - 30 uS 100 uS - 150 mV 350 mV - 30 uS 100 uS Test conditions: di/dt = 0.5 A/uS, Vin=48 V Note: All specifications are typical at 25 °C unless otherwise stated. General Specifications Parameter Min 93% Typ 95% Max - Switching Frequency 160 kHz 190 kHz 220 kHz Isolation Capacitance - 1500 pF - Over Temperature Protection - 115 °C - Efficiency MTBF Notes Vin=48V, Io=Io,max Average PCB temperature will not exceed 115 °C. Calculated Per Bell Core SR-332 (IO=80% full load; Vo=12 V; Ta = 25 °C) 3,008,073 hours Dimensions Inches (L × W × H) Millimeters (L × W × H) Weight - 1.3 x 0.9 x 0.4 33.0 x 22.9 x 10.2 14.5 g - 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 ISOLATED DC/DC CONVERTERS 48 VDC Input 12 VDC/8.5 A Output, 1/16 Brick Control Specifications Parameter Min Typ Max -0.3 V - 0.8 V 2.4 V - 18 V Notes Remote On/Off Signal Low (Unit On) Active Low Signal High (Unit Off) SRCA-08S12L. The remote on/off pin open, Unit off. Efficiency Data 100.00% EFFICIENCY 95.00% 90.00% 36 V 48 V 55 V 85.00% 80.00% 75.00% 0.00 2.00 4.00 6.00 8.00 OUTPUT CURRENT (A) Thermal Derating Curve Note: Derating curve is tested at nominal input voltage. Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com ISOLATED DC/DC CONVERTERS 48 VDC Input 12 VDC/8.5 A Output, 1/16 Brick Ripple and Noise Waveform Note: Ripple and noise at full load, 48 V input and Ta=25 deg C, and with a 10 uF tantalum capacitor and 1 uF ceramic capacitor on output. Transient Response Waveforms 50% to 75% Transient at 48 V input 75% to 50% load Transient at 48 V input Note: Transient response at di/dt=0.5 A/uS, 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 ISOLATED DC/DC CONVERTERS 48 Vdc Input 12 Vdc/8.5 A Output, 1/16 Brick Mechanical Outline Pin Connections Pin Function 1 Vin+ 2 Remote On/Off 3 Vin- 4 Vout- 5 Vout+ RoHS Compliance Complies with the European Directive 2002/95/EC, calling for the elimination of lead and other hazardous substances from electronic products. ©2008 Bel Fuse Inc. Specifications subject to change without notice. 121808 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