NON-ISOLATED DC/DC CONVERTERS 8.3 V-14 V Input 0.75 V-5.0 V/16 A Output SRBC-16A1Ax Series • RoHS Compliant Non-Isolated • Under-voltage Lockout (UVLO) • High Efficiency • Over Temperature Protection • High Power Density • OCP/SCP • Excellent Thermal Performance • Wide Input • Low Cost • Wide Trim • Flexible Output Voltage • Remote On/Off • Able to Sink & Source Current • Active Low/High (option) • Industrial Temperature Range • Remote Sense Description The Bel SRBC-16A1Ax modules are a series of non-isolated dc/dc converters that deliver up to 16 A of output current with full load efficiency of 92% at 3.3 V output. These modules provide precisely regulated voltage programmable via external resistor from 0.75 V to 5.0 V over a wide range of input voltage (8.4-14 V). The open-frame construction and small footprint enable designers to develop cost and space-efficient solutions. Standard features include remote On/Off, remote sense, over current protection, short current protection, and programmable output voltage. Part Selection Output Voltage Input Voltage Max. Output Current Max. Output Power Typical Efficiency Model Number Active Low Model Number Active High 0.75 V - 5.0 V 8.3 V -14 V 16 A 80 W 94% SRBC-16A1AL SRBC-16A1A0 Note: Add “G” suffix at the end of the model number to indicate Tray Packaging. Absolute Maximum Ratings Parameter Min Typ Max Input Voltage (continuous) -0.3 V - 15 V Output Enable Terminal Voltage -0.3 V - 15 V Ambient Temperature -40 °C - 85 °C Storage Temperature -55 °C - 125 °C Notes 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 CONVERTERS 8.3 V-14 V Input 0.75 V-5.0 V/16 A Output Input Specifications Parameter Min Typ Max 8.3 V 8.3 V 12 V 12 V 14.0 V 13.2 V Input Current (full load) - - 11 A Input Current (no load) - 100 mA - Remote Off Input Current - 2 mA - Input Reflected Ripple Current (pk-pk) - 70 mA 200 mA Input Reflected Ripple Current (rms) - - 150 mA I2t Inrush Current Transient - 0.2 A2s 0.4 A2s Turn-on Voltage Threshold - 8.0 V - Turn-off Voltage Threshold - 7.5 V - Notes Input Voltage Vo, set ≤ 3.63 V Vo, set > 3.63 V This power module is not internally fused. An input line fuse must always be used. Tested with one 1000 uF/25 V AL input capacitor with ESR=0.03 ohm max and 6 × 47 uF/16 V tantalum capacitors with ESR=0.013 ohm max at 100 kHz, & simulated source impedance of 1000 nH, 5 Hz to 20 MHz. Output Specifications Parameter Min Typ Max -2% Vo,set - 2% Vo,set Load Regulation - 0.1% Vo,set - Io=Io, min to Io, max Line Regulation - 0.1% Vo,set - Vin=Vin, min to Vin, max Regulation Over Temperature (-40 °C to+85 °C) - 0.3% Vo,set - Tref=Ta, min to Ta, max 0A - 16 A - 180% Io,out Output Voltage Set Point Output Current Current Limit Threshold Vin=12 V, full load - Short Circuit Surge Transient - 1A s 3A s Ripple and Noise (pk-pk) - 75 mV 100 mV Ripple and Noise (rms) - 30 mV 45 mV Turn on Time - 6 mS 10 mS Overshoot at Turn on - - 1% Vo,set 0 uF - 5000 uF 2 Notes 2 Tested with 0-20 MHz, 10 uF tantalum capacitor & 1 uF TDK ceramic capacitor at the output Output Capacitance ESR ≥ 10 mohm Transient Response 50% ~ 100% Max Load Settling Time 100% ~ 50% Max Load Settling Time VO=0.75 V 5.0 V - 100 mV - - 50 uS - - 100 mV - - 50 uS - di/dt=2.5 A/uS; Vin=12 V; and with 2 × 150 uF polymer capacitors 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 NON-ISOLATED DC/DC CONVERTERS 8.3 V-14 V Input 0.75 V-5.0 V/16 A Output General Specifications Parameter Min Typ Max - 94% 92% 90% 88% 87% 85% 79% - 265 kHz 300 kHz 335 kHz - 130 °C - 0.7525 V - 5.0 V - - 0.5 V Efficiency Vo=5.0 V Vo=3.3 V Vo=2.5 V Vo=1.8 V Vo=1.5 V Vo=1.2 V Vo=0.75 V Switching Frequency Over Temperature Shutdown 1 Output Trim Range (Wide Trim) Remote Sense Compensation MTBF Notes Measured at Vin=12 V, full load Calculated Per Bell Core SR-332 (IO = Nominal; Ta = 25 °C) 2,666,488 hours Dimensions Inches (L × W × H) Millimeters (L × W × H) 1.30 x 0.53 x 0.315 33.02 x 13.46 x 8.00 Weight - 8g - Notes: All specifications are typical at 25 °C unless otherwise stated. 1. The Tref temperature measurement location: Control Specifications Parameter Min Typ Max Signal Low (Unit Off) -0.2 V - 0.3 V Signal High (Unit On) - - Vin, max Signal Low (Unit On) -0.2 V - 0.3 V Signal High (Unit Off) 2.5 V - Vin, max Notes Remote On/Off SRBC-16A1A0; Remote On/Off pin open, Unit on. SRBC-16A1AL; 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 CONVERTERS 8.3 V-14 V Input 0.75 V-5.0 V/16 A Output Output Trim Equations Equation for calculating the trim resistor (in Ω) given the desired adjusted voltage (Vadj) is shown below. The Trim Up resistor should be connected between the Trim pin and Ground. Vout 10500 Rtrim = − 1000 Vadj − 0.7525 Sense Module trim Rtrim GND Equation for calculating the trim voltage (in V) given the desired adjusted voltage (Vadj) is shown below. The Trim Up voltage should be connected between the Trim pin and Ground. Vout Vtrim = 0.7 − 0.0667 × (Vadj − 0.7525) Sense Module trim Vtrim GND Thermal Derating Curves Vo=0.75 V Vo=1.8 V Vo=3.3 V Vo=5.0 V 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 8.3 V-14 V Input 0.75 V-5.0 V/16 A Output Efficiency Data Module 3.3V Module 5.0V 96.0% 98.0% 94.0% 8.3V 12.0V 13.2V 94.0% 92.0% Efficiency Efficiency 96.0% 90.0% 88.0% 92.0% 8.3V 12.0V 14.0V 90.0% 88.0% 86.0% 86.0% 84.0% 2.0 4.0 6.0 8.0 10.0 12.0 Output Current 14.0 84.0% 2.0 16.0 4.0 6.0 8.0 10.0 12.0 Output Current 94.0% 92.0% 92.0% Efficiency Efficiency 94.0% 8.3V 12.0V 14.0V 90.0% 88.0% 86.0% 90.0% 8.3V 12.0V 14.0V 88.0% 86.0% 84.0% 82.0% 84.0% 4.0 6.0 8.0 10.0 12.0 Output Current 14.0 80.0% 2.0 16.0 4.0 6.0 8.0 10.0 12.0 Output Current 14.0 16.0 Module 1.2V Module 1.5V 94.0% 92.0% 90.0% 92.0% 90.0% 86.0% Efficiency 8.3V 12.0V 14.0V 88.0% 84.0% 82.0% 80.0% 78.0% 2.0 88.0% 8.3V 12.0V 14.0V 86.0% 84.0% 82.0% 80.0% 78.0% 4.0 6.0 8.0 10.0 12.0 Output Current 14.0 76.0% 2.0 16.0 4.0 6.0 8.0 10.0 12.0 Output Current 14.0 Module 0.75V Efficiency Efficiency 16.0 Module 1.8V Module 2.5V 96.0% 82.0% 2.0 14.0 90.0% 85.0% 80.0% 75.0% 70.0% 65.0% 60.0% 55.0% 50.0% 2.0 8.3V 12.0V 14.0V 4.0 6.0 8.0 10.0 12.0 Output Current 14.0 16.0 Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com 16.0 NON-ISOLATED DC/DC CONVERTERS 8.3 V-14 V Input 0.75 V-5.0 V/16 A Output Mechanical Outline Pin Connections BOTTOM VIEW RECOMMENDED PAD LAYOUT Pin Function 1 Remote On/Off 2 Vin 3 N/A 4 Ground 5 Vout 6 Trim 7 Remote Sense PAD SIZE: MIN: 0.14"* 0.095" (3.56mm * 2.41mm) MAX: 0.165"* 0.11" (4.19mm * 2.79mm) RoHS Compliance Complies with the European Directive 2002/95/EC, calling for the elimination of lead and other hazardous substances from electronic products. ©2005 Bel Fuse Inc. Specifications subject to change without notice. 120505 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