Non-ISOLATED DC/DC CONVERTERS 13.2 Vdc Max Input, 0.8 Vdc – 5 Vdc/35 A Output Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. Jan.17, 2012 SRBL-30A1A0 RoHS Compliant PRELIMINARY Rev.A Features Non-Isolated Low Cost High Efficiency High Power Density Applications Telecommunications Networking Computers and peripherils Description The Bel SRBL-30A1A0 is a non-isolated dc to dc converter . The module use a SMD package. This converter is available in a range of output voltages from 0.8 Vdc to 5 Vdc over a wide range of input voltage. Part Selection Output Voltage Max. Input Voltage 0.8 Vdc – 5Vdc 13.2 Vdc Max. Output Current 35 A Typical Efficiency ( Vo=1.8V ) 92% Model Number SRBL-30A1A0 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 Min Typ Input Voltage (continuous) -0.3 V Voltage at Pin5 (+7 V) -0.3 V Voltage at Pin3 (PWM) -0.3 V Ambient Temperature -5 C Storage Temperature -40 C Notes: All specification are typical at 25C unless otherwise stated. Max 15 V 8.8 V 8.8 V Notes 70 C 100 C Input Specifications Parameter Operating Input Voltage Min - Typ - Input Current - - TBD Input Current (no load) - - 80 mA 1,2 Input Capacitance - 40 uF - 6.7 V 7V 7.5 V Under-voltage lockout, rising - - 6.7 V Under-voltage lockout, falling 4.7 V - - - 1V - Operating +7 V (Pin5) Hysteresis Current (switching at 500 kHz) High 3 PWM (Pin3) Max 13.2 V Low 1 Tri-state current - - 100 mA 4V - 5.5 V - - 0.4 V -10 uA - 10 uA Notes 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 13.2 Vdc Max Input, 0.8 Vdc – 5 Vdc/35 A Output Jan.17, 2012 Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. Notes: 1. 4x 10 uF/16 V on power block. 2. Additional input capacitors are to be added externally as part of the buck regulator design. 3. Sourcing or sinking current current to/from PWM(Pin 3) without the specified range wiil result in both high and low-side MOSFET's to be held off by the gate-driver circuitry. Output Specifications Parameter 1 Output Current Range Min 0A Typ - Max 35 A Vout =1.0V 0A - 30A Vout = 1.8V - 20 uF - - 200 Ω - - 380 nH - DCR (25C) 0.51 mΩ - 0.57 mΩ Isat (125C) - 40 A - Output Current Range Output Capacitance 1 2,3 Output-to-GND Resistor 4 inductance 5 Inductor Notes Notes: 1. Vin from 7V to 12V input,switching at 500KHz. 2. 2x 10uF/0805/6.3V/X7R + 1x 0402/0.1uF/16V/X7R on power block. 3. Additional output capacitors are to be added externally as part of the buck regulator design. 4. 0805 resistor on power block. 5. See Block Diagram for DCR sense requirements. 6. All specifications are typical at nominal input, 25°C unless otherwise stated. 2. 2 General Specifications Parameter Efficiency Min Typ Max - 92% 87.5% - 0.8 V - 5V - 495 uA - 1.345 V 1.35 V 1.355 V - -4.4 mV/C - Notes 1,2 Vo=1.8 V Vo=1.0 V Output Voltage range Temperature Sense MTBF Io=30A Io=35A Bias current sourced from controller (into Pin 4) Voltage at 25C (Pin 4) Temperature coefficient ( 0 to 130C) TBD Dimensions Inches (L × W × H) Millimeters (L × W × H) Weight - 1.00 x 0.50 x 0.48 25.40 x 12.70 x 12.19 TBD - Notes: 1. Vin from 7V to 12V input,full load output current,switching at 400KHz with 200LFM at 55C. 2.Gate drive and controller losses are included.For the purpose of this calculation,controller loss is assumed to be 0.2W 3.Calculated according to Bellcore or Telcordia TR-NTW-000332 at 40C full-load. 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 13.2 Vdc Max Input, 0.8 Vdc – 5 Vdc/35 A Output Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. Jan.17, 2012 Efficiency Data 7 V to 12 V input, switching at 400 kHz, with 200LFM at 25C. Efficiency vs. Output Current at Room Temperature 100.0% EFFICIENCY (%) 95.0% 90.0% 85.0% 80.0% 75.0% 7V 10V 70.0% 12V 65.0% 3.5 8.75 17.5 26.25 35 OUTPUT CURRENT (Amp) Vo=1.0 V Efficiency vs. Output Current at Room Temperature 100.0% EFFICIENCY (%) 95.0% 90.0% 85.0% 80.0% 75.0% 7V 10V 70.0% 12V 65.0% 3 7.5 15 22.5 30 OUTPUT CURRENT (Amp) Vo=1.8 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 13.2 Vdc Max Input, 0.8 Vdc – 5 Vdc/35 A Output Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. Jan.17, 2012 Temperature sense Voltage at Pin 4(V) Temperature sense 1.6 1.5 1.4 Temperature sense 1.3 1.2 1.1 1 -10 10 30 50 70 Temperature(C) Thermal Derating Curves Thermal derating curve, Vin=12V,switching at 500KHz. Vout=1.0 V Vout=1.8 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 13.2 Vdc Max Input, 0.8 Vdc – 5 Vdc/35 A Output Jan.17, 2012 Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. Block Diagram For DCR sensing, there shall be an external capacitor (between CS+ and CS- ) to work with the 2.37K on power block(between CS+ and output inductor as shown ). 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 13.2 Vdc Max Input, 0.8 Vdc – 5 Vdc/35 A Output Jan.17, 2012 Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. Mechanical Outline Pin Connections Pin Function Pin Function 1 Vout 6 Vin 2 GND 7 -CS 3 PWM 8 +CS 4 TEMP 9 GND 5 +7 V 10 Vout - - 11 GND Note: 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 245 C. 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 13.2 Vdc Max Input, 0.8 Vdc – 1.8 Vdc/35 A Output Bel Power, Inc. , a subsidiary of Bel Fuse, Inc. Jan.17, 2012 Revision History Date Revision 2012-01-17 A Changes Detail Approval First Release XF Jiang RoHS Compliance Complies with the European Directive 2002/95/EC, calling for the elimination of lead and other hazardous substances from electronic products. 2012 Bel Fuse Inc. Specifications subject to change without notice. 011712 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