SRBA-03A1AX BEL | Alldatasheet
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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/3 A Output
- Non-Isolated • Under-Voltage Lockout (UVLO)
- Fixed Frequency • OCP/SCP
- High Efficiency • Remote On/Off
- High Power Density • Wide Trim Range
- Active Low/High (option) • Wide Input Range
Description
The Bel SRBA-03A1Ax modules are a series of non-isolated dc/dc converters that deliver up to 3 A of output current with full load efficiency of 93% at 5.0 V output. These modules provide precisely regulated voltage programmable via external resistor from 0.75 V to 5.5 V over a wide range of input voltage. Their open-frame construction and small footprint enable designers to develop cost and space-efficient solutions. Standard features include remote On/Off, programmable output voltage, over-temperature protection, over current protection, short circuit protection, and under-voltage lockout. Part Selection Output Voltage Input Voltage Max. Output Current Max. Output Power Typical Efficiency at 5.0V Model Number Active High Model Number Active Low 0.75 V - 5.0 V 8.3 V - 14 V 3 A 15 W 93% SRBA-03A1A0 SRBA-03A1AL Note: Add “G” suffix at the end of the model number to indicate Tray Packaging. Absolute Maximum Ratings Parameter Min Typ Max Notes 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 Note: All specifications are typical at 25°C unless otherwise stated. Input Specifications Parameter Min Typ Max Notes Input Voltage 8.3 V 12 V 14 V Input Current (full load) Vo=5.0 V Vo=3.3 V Vo=0.75 V 1.35 A 0.90 A 0.24 A 2.00 A 1.30 A 0.35 A Input Current (no load) Vo=5.0 V Vo=3.3 V Vo=0.75 V 55 mA 40 mA 15 mA 65 mA 50 mA 20 mA SRBA-03A1Ax Series RoHS Compliant
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/3 A Output Input Specifications (continued) Parameter Min Typ Max Notes Remote Off Input Current - 3 mA 6 mA Input Reflected Ripple Current (pk-pk) Vo=5.0 V Vo=3.3 V Vo=0.75 V 75 mA 50 mA 20 mA 120 mA 90 mA 35 mA Input Reflected Ripple Current (rms) Vo=5.0 V Vo=3.3 V Vo=0.75 V 20 mA 15 mA 5 mA 60 mA 30 mA 15 mA Tested with two 100 uF/25 V tantalum input capacitors & simulated source impedance of 1 uH, 5 Hz to 20 MHz. I2t Inrush Current Transient - 0.01 A 2s0 . 0 2 A 2s Turn-on Voltage Threshold 7.6V 7.9 V 8.2 V Turn-off Voltage Threshold 7.0V 7.8 V 8.1 V Output Specifications Parameter Min Typ Max Notes Output Voltage Set Point -2% Vo,set - 2% Vo,set Vin=12 V, lo=lomax, full load Output Voltage Set Point -2.5% Vo,set - 3.5% Vo,set Over all operating input voltages, resistive loads and temperature conditions Load Regulation 0.5% Vo,set 0.4% Vo,set 0.5% Vo,set Io=Io, min to Io, max Line Regulation 0.4% Vo,set 0.3% Vo,set 0.4% Vo,set Vin=Vin, min to Vin, max Regulation Over Temperature (-40 °C to +85 °C) - 0.5% Vo,set 0.8% Vo,set Output Current 0 A - 3 A Current Limit Threshold 5 A - 12 A Short Circuit Surge Transient - 0.15 A 2s - Ripple and Noise (pk-pk) Vo=5.0 V Vo=3.3 V Vo=0.75 V 65 mV 45 mV 20 mV 100 mV 80 mV 35 mV Ripple and Noise (rms) Vo=5.0 V Vo=3.3 V Vo=0.75 V 20 mV 10 mV 5 mV 40 mV 25 mV 15 mV Tested with 0-20 MHz, with 10 uF/10 V tantalum capacitor and 1uF/10 V ceramic capacitor at the output Turn on Time - 5 mS 8 mS Overshoot at Turn on - 0% 3% Output Capacitance 0 uF - 1200 uF Transient Response 50% ~ 100% Max Load - 200 mV 300 mV Settling Time - 50 uS 80 uS 100% ~ 50% Max Load - 200 mV 300 mV Settling Time All - 50 uS 80 uS di/dt=2.5 A/uS; Vin=12 V; and with 10 uF/10 V tantalum capacitor and 1 uF/10 V ceramic capacitor at the output Note: All specifications are typical at nominal input (Vin=12 V), 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/3 A Output General Specifications Parameter Min Typ Max Notes Efficiency Vo=5.0 V Vo=3.3 V Vo=0.75 V 90% 88% 76% 93% 91% 80% Measured at Vin=12 V, full load (Current Source) Switching Frequency - 300 kHz - Over Temperature Shutdown - 135 °C - MTBF 6,740,000 hours Calculated Per Bell Core SR-332 (IO = Nominal; Ta = 25 °C) Dimensions (Surface Mount) Inches (L × W × H) Millimeters (L × W × H) 0.8 x 0.45 x 0.251 20.32 x 11.42 x 6.38 Weight - 3 g - Note: All specifications are typical at 25 °C unless otherwise stated. Control Specifications Parameter Min Typ Max Notes Remote On/Off Signal Low (Unit Off) -0.3 V - 0.4 V Signal High (Unit On) 2.5 V - 14 V SRBA-03A1A0; Remote On/Off pin open, Unit on. Signal Low (Unit On) -0.3 V - 0.4 V Signal High (Unit Off) 2.5 V - 14 V SRBA-03A1AL; Remote On/Off pin open, Unit on. Output Voltage Trim Range (Wide Trim) 0.7525 V - 5.0 V Output Trim Equations Equation for calculating the trim resistor (in k Ω) given the desired adjusted voltage (Vadj) is shown below. The Trim Up resistor should be connected between the Trim pin and Ground. 17525.0 507.10 −−= adj trim VR 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. )7525.0(0667.07.0 −×−= adjtrim VV RtrimModule Vout GND Trim Vtrim Module Vout GND Trim
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/3 A Output Efficiency Data MODULE 5.0V 60.0% 65.0% 70.0% 75.0% 80.0% 85.0% 90.0% 95.0% 100.0% OUTPUT CURRENT EFFICIENCY 8.3V 12.0V 14.0V MODULE 3.3V 60.0% 65.0% 70.0% 75.0% 80.0% 85.0% 90.0% 95.0% OUTPUT CURRENT EFFICIENCY 8.3V 12.0V 14.0V MODULE 0.75V 50.0% 55.0% 60.0% 65.0% 70.0% 75.0% 80.0% 85.0% OUTPUT CURRENT EFFICIENCY 8.3V 12.0V 14.0V
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/3 A Output Thermal Derating Curves Vin=12 V, Vo=5.0 V Vin=12 V, Vo=3.3 V Vin=12 V, Vo=0.75 V
©2005 Bel Fuse Inc. Specifications subject to change without notice. 120205 CORPORATE FAR EAST EUROPE Bel Fuse Inc. Bel Fuse Ltd. Bel Fuse Europe Ltd.
206 Van Vorst Street 8F/ 8 Luk Hop Street Preston Technology Management Centre
Jersey City, NJ 07302 San Po Kong Marsh Lane, Suite G7, Preston Tel 201-432-0463 Kowloon, Hong Kong Lancashire, PR1 8UD, U.K. Fax 201-432-9542 Tel 852-2328-5515 Tel 44-1772-556601 www.belfuse.com Fax 852-2352-3706 Fax 44-1772-888366 www.belfuse.com www.belfuse.com NON-ISOLATED DC/DC CONVERTERS 8.3 V-14 V Input 0.75 V-5.0 V/3 A Output Mechanical Outline RoHS Compliance Complies with the European Directive 2002/95/EC, calling for the elimination of lead and other hazardous substances from electronic products. Pin Connections Pin Function