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| NON-ISOLATED DC/DC CONVERTERS 8.3 V-14 V Input 0.75 V-5.0 V/10 A Output SRBC-10A2Ax Series * * * * * * * * Non-Isolated High Efficiency High Power Density Excellent Thermal Performance Low Cost Flexible Output Voltage Sequencing Remote Sense Able to Sink/Source Current RoHS Compliant * * * * * * * * Under-voltage Lockout (UVLO) Over Temperature Protection OCP/SCP Wide Input Wide Trim Remote On/Off Active Low/High (option) Industrial Temperature Range Description The Bel SRBC-10A2Ax modules are a series of non-isolated dc/dc converters that deliver up to 10 A of output current with full load efficiency of 93% 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 (8.3 V-14 V). These modules have a sequencing feature that enables designers to implement various types of output voltage sequencing when powering multiple voltages on a board. The open-frame construction and small footprint enable designers to develop cost and space-efficient solutions. Standard features include remote On/Off, over current protection, short current protection, wide input, and programmable output voltage. Part Selection Output Voltage 0.75 V - 5.0 V Input Voltage 8.3 V - 14 V Max. Output Current 10 A Max. Output Power 50.0 W Typical Efficiency 95% Model Number Active Low SRBC-10A2AL Model Number Active High SRBC-10A2A0 Note: Add "G" suffix at the end of the model number to indicate "Tray Packaging". Absolute Maximum Ratings Parameter Input Voltage (continuous) Output Enable Terminal Voltage Sequencing Voltage 1 Min -0.3 V -0.3 V -0.3 V -40 C -55 C Typ - Max 15 V 15 V Vin 85 C 125 C Notes Ambient Temperature Storage Temperature Notes: All specifications are typical at 25 C unless otherwise stated. 1. SRBC-10A2Ax series of modules include a sequencing feature that enables users to implement various types of output voltage sequencing in their applications. This is accomplished via an additional sequencing pin. When the sequencing feature is not used, tie the SEQ pin to Vin or leave it unconnected. 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/10 A Output Input Specifications Parameter Input Voltage Vo, set 3.63 V Vo, set > 3.63 V Input Current (full load) Input Current (no load) Remote Off Input Current Input Reflected Ripple Current (pk-pk) 8.3 V 8.3 V 12 V 12 V 50 mA 2 mA 14 V 13.2 V 6.5 A 400 mA Tested with one 1000 uF/25 V AL input capacitor with ESR=0.03 ohm max and 4 x 47 uF/16 V tan capacitors with ESR=0.013 ohm max at 100 kHz, & simulated source impedance of 1000 nH, 5 Hz to 20 MHz. An input line fuse must always be used. Min Typ Max Notes Input Reflected Ripple Current (rms) I t Inrush Current Transient Turn-on Voltage Threshold Turn-off Voltage Threshold 2 - 0.04 A s 8.2 V 7.9 V 2 150 mA 0.08 A s 2 Note: All specifications are typical at 25 C unless otherwise stated. Output Specifications Parameter Output Voltage Set Point Load Regulation Line Regulation Regulation Over Temperature (-40 C to +85 C) Output Current Current Limit Threshold Short Circuit Surge Transient Ripple and Noise (pk-pk) Ripple and Noise (rms) Turn on Time Overshoot at Turn on Output Capacitance Transient Response 50% ~ 100% Max Load Settling Time 100% ~ 50% Max Load Settling Time VO = 0.75 V 5V 100 mV 50 uS 100 mV 50 uS di/dt=2.5 A/uS; Vin=12 V; and with 2 x 150 uF polymer capacitors at the output Min -2% Vo,set 0A Typ 0.1% Vo,set 0.1% Vo,set 0.3% Vo,set 200% Io 1A s 50 mV 20 mV 6 mS 2 Max 2% Vo,set 10 A 3A s 100 mV 40 mV 10 mS 1% Vo,set 5000 uF 2 Notes Vin=12 V, full load Tref=Ta, min to Ta, max Tested with 0-20 MHz, with 10 uF tantalum capacitor & 1 uF ceramic capacitor 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/10 A Output General Specifications Parameter 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 Output Voltage Trim Range Remote Sense Compensation MTBF Dimensions Inches (L x W x H) Millimeters (L x W x H) Weight 1.3 x 0.53 x 0.315 33.02 x 13.46 x 8.00 8g 1 Min 265 kHz 0.7525 V - Typ 95% 93% 92% 90% 89% 87.5% 81% 300 kHz 130 C 4,982,651 hours Max 335 kHz 5.0 V 0.5 V Notes Measured at Vin=12 V, full load Calculated Per Bell Core SR-332 (IO = 80% Io,max; Vo=5 V; Vin=12 V; Ta = 25C) Note: All specifications are typical at 25 C unless otherwise stated. 1. The Tref temperature measurement location: Control Specifications Parameter Remote On/Off Signal Low (Unit Off) Signal High (Unit On) Signal Low (Unit On) Signal High (Unit Off) Voltage Sequencing Sequencing Delay Time Sequencing Slew Rate Capability Tracking Accuracy Power-Up Power-Down 100 mV 300 mV 200 mV 500 mV 10 mS 2 V/mS Vin, min to Vin, max; Io, min to Io, max; Vseq 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/10 A Output Output Trim Equations Equation for calculating the trim resistor (in ) given the desired adjusted voltage (Vadj) is shown below. The Trim Up resistor should be connected between the Trim pin and Ground. Vout Sense Rtrimup = 10500 - 1000 Vadj - 0.7525 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 Sense Vtrimup = 0.7 - 0.0667 x (Vadj - 0.7525) 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/10 A Output Efficiency Data Module 5.0V Efficiency Module 3.3V Efficiency 100.0% 90.0% 80.0% 1A 2.5A 5A 7.5A 10A Output Current 100.0% 90.0% 80.0% 1A 2.5A 5A 7.5A 10A Output Current 8.3V 12.0V 13.2V 8.3V 12.0V 14.0V Module 2.5V 100.0% 90.0% 80.0% 1A 2.5A 5A 7.5A 10A Output Current 8.3V 12.0V 14.0V Module 1.8V Efficiency 100.0% 90.0% 80.0% 70.0% 1A 2.5A 5A 7.5A 10A Output Current 8.3V 12.0V 14.0V Efficiency Module 1.5V 100.0% 90.0% 80.0% 70.0% 1A 2.5A 5A 7.5A 10A Output Current Module 1.2V Efficiency 90.0% 70.0% 50.0% 1A 2.5A 5A 7.5A 10A Output Current 8.3V 12.0V 14.0V Efficiency 8.3V 12.0V 14.0V Module 0.75V Efficiency 90.0% 70.0% 50.0% 1A 2.5A 5A 7.5A 10A Output Current 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/10 A Output Pin Connections Pin 1 2 3 4 5 Function Remote On/Off Vin+ SEQ Ground Vout+ Trim Remote Sense BOTTOM VIEW RECOMMENDED PAD LAYOUT 6 7 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. (c)2005 Bel Fuse Inc. Specifications subject to change without notice. 090105 CORPORATE Bel Fuse Inc. 206 Van Vorst Street Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com FAR EAST 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 EUROPE 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 |
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