NON-ISOLATED DC/DC CONVERTERS
8.3 V-14 V Input 0.75 V-5.0 V/16 A Output
SRBC-16A1Ax Series
• • • • • • • • Non-Isolated High Efficiency High Power Density Excellent Thermal Performance Low Cost Flexible Output Voltage Able to Sink & Source Current Industrial Temperature Range
RoHS Compliant
• • • • • • • • Under-voltage Lockout (UVLO) Over Temperature Protection OCP/SCP Wide Input Wide Trim Remote On/Off Active Low/High (option) 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 0.75 V - 5.0 V Input Voltage 8.3 V -14 V Max. Output Current 16 A Max. Output Power 80 W Typical Efficiency 94% Model Number Active Low SRBC-16A1AL Model Number Active High SRBC-16A1A0
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 Ambient Temperature Storage Temperature Min -0.3 V -0.3 V -40 °C -55 °C Typ Max 15 V 15 V 85 °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 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 100 mA 2 mA 70 mA 14.0 V 13.2 V 11 A 200 mA 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. This power module is not internally fused. An input line fuse must always be used. Min Typ Max Notes
Input Reflected Ripple Current (rms) I2t Inrush Current Transient Turn-on Voltage Threshold Turn-off Voltage Threshold
-
0.2 A2s 8.0 V 7.5 V
150 mA 0.4 A2s -
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 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 0 uF 5000 uF Min -2% Vo,set 0A Typ 0.1% Vo,set 0.1% Vo,set 0.3% Vo,set 180% Io,out 1A s 75 mV 30 mV 6 mS 2
Max 2% Vo,set 16 A 3A s 100 mV 45 mV 10 mS 1% Vo,set
2
Notes Vin=12 V, full load Io=Io, min to Io, max Vin=Vin, min to Vin, max Tref=Ta, min to Ta, max
Tested with 0-20 MHz, 10 uF tantalum capacitor & 1 uF TDK ceramic capacitor 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 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
Min 265 kHz 0.7525 V -
Typ 94% 92% 90% 88% 87% 85% 79% 300 kHz 130 °C 2,666,488 hours
Max 335 kHz 5.0 V 0.5 V
Notes
Measured at Vin=12 V, full load
Output Trim Range (Wide Trim) Remote Sense Compensation MTBF Dimensions Inches (L × W × H) Millimeters (L × W × H) Weight
Calculated Per Bell Core SR-332 (IO = Nominal; Ta = 25 °C)
1.30 x 0.53 x 0.315 33.02 x 13.46 x 8.00 8g -
Notes: 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) -0.2 V -0.2 V 2.5 V 0.3 V Vin, max 0.3 V Vin, max SRBC-16A1A0; Remote On/Off pin open, Unit on. SRBC-16A1AL; Remote On/Off pin open, Unit on. Min Typ Max 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
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 5.0V 98.0% 96.0% Efficiency 94.0% 92.0% 90.0% 88.0% 86.0% 84.0% 2.0 4.0 6.0 8.0 10.0 12.0 Output Current 14.0 16.0 8.3V 12.0V 13.2V
Module 3.3V 96.0% 94.0% Efficiency 92.0% 90.0% 88.0% 86.0% 84.0% 2.0 4.0 6.0 8.0 10.0 12.0 Output Current 14.0 16.0 8.3V 12.0V 14.0V
Module 2.5V 96.0% 94.0% Efficiency 92.0% 90.0% 88.0% 86.0% 84.0% 82.0% 2.0 4.0 6.0 8.0 10.0 12.0 Output Current 14.0 16.0 8.3V 12.0V 14.0V
Module 1.8V 94.0% 92.0% Efficiency 90.0% 88.0% 86.0% 84.0% 82.0% 80.0% 2.0 4.0 6.0 8.0 10.0 12.0 Output Current 14.0 16.0 8.3V 12.0V 14.0V
Module 1.5V 94.0% 92.0% 90.0% Efficiency 88.0% 86.0% 84.0% 82.0% 80.0% 78.0% 2.0 8.3V 12.0V 14.0V
Module 1.2V 92.0% 90.0% Efficiency 88.0% 86.0% 84.0% 82.0% 80.0% 78.0% 76.0% 2.0 8.3V 12.0V 14.0V
4.0
6.0
8.0 10.0 12.0 Output Current
14.0
16.0
4.0
6.0
8.0 10.0 12.0 Output Current
14.0
16.0
Module 0.75V
90.0% 85.0% 80.0% 75.0% 70.0% 65.0% 60.0% 55.0% 50.0% 2.0
Efficiency
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
NON-ISOLATED DC/DC CONVERTERS
8.3 V-14 V Input 0.75 V-5.0 V/16 A Output
Mechanical Outline
Pin Connections
Pin 1 2 3 Function Remote On/Off Vin N/A Ground Vout Trim Remote Sense
BOTTOM VIEW RECOMMENDED PAD LAYOUT
4 5 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.
©2005 Bel Fuse Inc. Specifications subject to change without notice. 120505
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
