NON-ISOLATED DC/DC CONVERTER 9.0 V - 32 V Input 10 V - 12 V/3.5 A Output SRDB-04HX20 • RoHS Compliant • Non-Isolated Remote Sense • Fixed Frequency (340 kHz) • Low Profile Package (8.5mm) • Over Current Protection • Remote On/Off (Active Low) • SCP Description The SRDB-04HX20 is part of the low cost non-isolated dc/dc converter. The module uses a DIP package for ease of layout and space savings, with a low profile of 8.5 mm. The output is closely regulated and the efficiency of 12 V is typically 86% at full load. Features include remote sense, over current protection and remote on/off. Part Selection Output Voltage Input Voltage Max. Output Current Max. Output Power Typical Efficiency Model Number 10 V - 12 V 9.0 V - 32 V 3.5 A 42 W 86% SRDB-04HX20 Note: Add “R” suffix at the end of the model number to indicate “Reel Packaging”, and “G” for “Tray Packaging”. Absolute Maximum Ratings Parameter Min Typ Max Notes Input Voltage (continuous) -0.3 V - 36 V Output Enable Voltage -0.3 V - 12 V Ambient Temperature -40 °C - 85 °C Storage Temperature -55 °C - 125 °C Input Specifications Parameter Min Typ Max 9V 20 V 32 V Input Current (Full load) - - 5.6 A Input Current (No load) - 50 mA 100 mA Remote Off Input Current - 1 mA 3 mA Input Reflected Ripple Current (pk-pk) - 500 mA 750 mA Input Reflected Ripple Current (rms) - 170 mA 250 mA I t Inrush Current Transient - 0.05 A s 0.1 A s Turn-on Voltage Threshold - 8.5 V 9.0 V Input Voltage 2 2 Notes Tested with simulated source impedance of 500 nH, 5 Hz to 20 MHz; and two 100 uF/50 V electrolytic capacitors and a 3.3 uF/50 V ceramic capacitor at the input. 2 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 NON-ISOLATED DC/DC CONVERTER 9.0 V - 32 V Input 10 V - 12 V/3.5 A Output Output Specifications Parameter Min Typ Max 11.89 V 12.13 V 12.37 V Line Regulation - ±12 mV ±24 mV Load Regulation - ±12 mV ±24 mV Regulation Over Temperature (-40 °C to 85 °C) - ±30 mV ±50 mV Ripple and Noise (rms) - 2.5 mV 5 mV Ripple and Noise (pk-pk) - 10 mV 20 mV Output Current 0A - 3.5 A Output Current Limit Threshold Output Voltage Set Point 4A - Short Circuit Surge Transient - 0.2 A s 0.5 A s Turn on Time - 3.5 mS 10 mS - 2% Overshoot at Turn on Output Capacitance Notes Vin=20 V, lout=50% full load Test conditions: 0-20 MHz BW; with 33 uF-0.5 uH-33 uF second stage filter. 7A 2 2 5% 0 uF 220 uF Transient Response 50% ~ 100% Max Load 100% ~ 50% Max Load Overshoot - 220 mV 250 mV Settling Time - 300 uS 500 uS Overshoot - 130 mV 250 mV Settling Time - 300 uS 500 uS Tested at di/dt=0.5 A/us, Vin=20 V, with 33uF-0.5 uH-33 uF second stage filter. Note: All specifications are typical at 20 V input, full load at 25 °C unless otherwise stated. General Specifications Parameter Min 83% Typ 86% Switching Frequency 310 kHz 340 kHz 370 kHz Output Voltage Trim Range 80%Vo - 105%Vo - - 5% Efficiency Remote Sense Compensation MTBF Max - Notes Vin=20 V, full load Calculated Per Bell Core SR-332 (IO = 2 A, Vo=12 V, Vin=20 V; Ta = 25 °C) 5,373,282 hours Dimensions Inches millimeters Weight - 1.22 x 0.827 x 0.345 30.99 x 21.00 x 8.76 11 g - Note: All specifications are typical at nominal input, full load at 25 °C unless otherwise stated. Control Specifications Parameter Min Typ Max Signal Low (Unit On) -0.3 V - 1V Signal High (Unit Off) 2.8 V - 12 V Notes Remote On/Off Remote on/off pin open, unit on. Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com NON-ISOLATED DC/DC CONVERTER 9.0 V - 32 V Input 10 V - 12 V/3.5 A Output Output Trim Equations Equations for calculating the trim resistor (in kΩ) given the desired adjusted voltage (Vadj) and the nominal output voltage of the converter (Vnom) are shown below. The Trim Down resistor should be connected between the Trim pin and Vout. The Trim Up resistor should be connected between the Trim pin and Ground. Only one of the resistors should be used for any given application. Rtrimdown = 83.408 − 8.66 Vnom − Vadj Vout Rtrimdown Module Trim GND Rtrimup Vout 21.65 = Vadj − Vnom Module Trim Rtrimup GND Note: The output voltage Vnom = 12.13V. Efficiency Data Efficiency Efficiency Curve 90.0% 88.0% 86.0% 84.0% 82.0% 80.0% 78.0% 76.0% 74.0% 72.0% 70.0% 9.0 V 20.0 V 32.0 V 0.5 1.0 1.5 2.0 2.5 3.0 3.5 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 NON-ISOLATED DC/DC CONVERTER 9.0 V - 32 V Input 10 V - 12 V/3.5 A Output Thermal Derating Curve Note: Derating curve is for 12 V output and 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 NON-ISOLATED DC/DC CONVERTERS 9.0 V - 32 V Input 10 V - 12 V/3.5 A Output Mechanical Outline Pin Connections Pin 1 2 3 4 5 6 7 8 9 10 11 12 Function Trim Remote On/Off Remote Sense Vo Vo Vo Ground Ground Ground N/A (Leave this pin unconnected) Vin Vin RoHS Compliance Complies with the European Directive 2002/95/EC, calling for the elimination of lead and other hazardous substances from electronic products. These parts are not however compatible with the higher temperatures associated with lead free solder processes and must be soldered using a reflow profile with a peak temperature of no more than 240 ºC. ©2005 Bel Fuse Inc. Specifications subject to change without notice. 112205 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