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NON-ISOLATED DC/DC CONVERTERS
8.3 V-14 V Input 0.75 V-5.5 V/16 A Output
VRBC-16A2Ax
* * * * * * * * Non-Isolated High Efficiency High Power Density
Series
RoHS Compliant
* * * * * * * * * Under-voltage Lockout (UVLO) Over Temperature Protection OCP/SCP Wide Input Wide Trim Remote On/Off Active Low/High (option) Remote Sense Industrial Temperature Range
Excellent Thermal Performance Low Cost Flexible Output Voltage Sequencing (option) Able to Sink & Source Current Vout Prebias
Description
The Bel VRBC-16A2Ax is part of the non-isolated dc/dc converter series. The modules use a SIP package. These converters are available in a range of output voltages from 0.75 V to 5.5 V over a wide range of input voltage (Vin = 8.3 V-14 V). The Bel VRBC-16A2Ax has a sequencing feature that enables designers to implement various types of output voltage sequencing when powering. The efficiency is typically 92% at 3.3 V output and 12 V input at full load.
Part Selection
Output Voltage 0.75 V - 5.5 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 VRBC-16A2AL Model Number Active High VRBC-16A2A0
Notes: 1.Change the last character to "C" to indicate 0.20'' pin length and active low. 2. 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. VRBC-16A2Ax 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 not using the sequencing feature, either, 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-5.5 V/16 A Output
Input Specifications
Parameter Input Voltage Vo, set3.63 V Vo, set >3.63 V Input Current (full load) Input Current (no load) Remote Off Input Current 8.3 V 8.3 V 12 V 12 V 100 mA 2 mA 14 V 13.2 V 11 A Tested with one 1000 uF/25 V AL input capacitor with ESR=0.03 ohm max and 6 x 47uF/16 V tan capacitors with ESR=0.013 ohm max at 100 kHz, & simulated source impedance of 1000 nH, 5 Hz to 20 MHz.
2
Min
Typ
Max
Notes
Input Reflected Ripple Current (pk-pk)
-
30 mA
-
I t Inrush Current Transient Turn-on Voltage Threshold Turn-off Voltage Threshold
2
-
0.2 A s 7.8 V 7.3 V
2
0.4 A s -
Output Specifications
Parameter Output Voltage Set Point Load Regulation Line Regulation Regulation Over Temperature (-40C to +85C) 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 All 100 mV 80 uS 100 mV 80 uS di/dt=2.5 A/uS; Vin=12 V; and with 330uF Tantalum capacitors at the output Min -2% Vo,set 0A 0 uF 0 uF Typ 0.4% Vo,set 0.3% Vo,set 0.4% Vo,set 180% Io,out 1A s 50 mV 30 mV 8 mS 2
Max 2% Vo,set 16 A 3 A2s 100 mV 45 mV 20 mS 1% Vo,set 5000 uF 1000 uF
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 ceramic capacitor at the output
ESR10 mohm ESR1 m
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-5.5 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 250 kHz 0.7525 V -
Typ 94% 92% 90% 88% 87% 85% 78% 280 kHz 130 C 4,619,490 hours
Max 310 kHz 5.5 V 0.5 V
Notes
Measured at Vin=12 V, full load
Output Trim Range (Wide Trim) Remote Sense Compensation MTBF Dimensions Inches (L x W x H) Millimeters (L x W x H) Weight
Calculated Per Bell Core SR-332 (IO = 80% Io,max; Vin=12 V; Vo=3.3 V; Ta = 25 C)
-
2.0x 0.5 x 0.32 50.8 x 12.7 x 8.13 7.1 g
-
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) Voltage Sequencing Sequencing Delay Time Sequencing Slew Rate Capability Tracking Accuracy Power-Up Power-Down 10 mS 100 mV 300 mV 2 V/mS 200 mV 500 mV Vin, min to Vin, max; Io, min to Io, max; VseqVRBC-16A2A0; Remote On/Off pin open, Unit on. VRBC-16A2AL; 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-5.5 V/16 A Output
Remote On/Off
For Active High Modules (Positive Logic)
When the transistor Q1 is in the Off state, the power module is ON. When the transistor Q1 is turned On, the power module is OFF.
Vin
Vin
Module
Remote On/Off
Q1
GND
GND
For Active Low Modules (Negative Logic)
When the transistor Q1 is in the Off state, the power module is OFF. When the transistor Q1 is turned On, the power module is ON.
Vin
R
Vin
Module
Remote On/Off
Q1
GND
GND
Output Trim Equations
Equation for calculating the trim resistor given the desired output voltage (Vo) is shown below. The Trim Up resistor should be connected between the Trim pin and Ground.
R trim =
10500 - 1000( ) Vo - 0.7525
Rtrim (K) Open 22.46 13.05 9.024 5.009 3.122 1.472
Vout
Vo (V) 0.7525 1.2 1.5 1.8 2.5 3.3 5.0
Sense
Module
trim
Rtrim
GND
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-5.5 V/16 A Output
Ripple and Noise
Ripple and noise at full load, 12Vdc input, 5.0V output and Ta=25 deg C
Ripple and noise at full load, 12Vdc input, 3.3V output and Ta=25 deg C
Ripple and noise at full load, 12Vdc input, 0.75V output and Ta=25 deg C Note: External load with 10uF tantalum capacitor and 1uF ceramic at the output.
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-5.5 V/16 A Output
Transient Response
External load capacitor Cext=0uF, di/dt=2.5A/us
50% to 100% load Transient at 5.0Vdc output
100% to 50% load Transient at 5.0Vdc output
50% to 100% load Transient at 3.3Vdc output
100% to 50% load Transient at 3.3Vdc output
50% to 100% load Transient 0.75Vdc output
100% to 50% load Transient at 0.75Vdc output
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-5.5 V/16 A Output
Transient Response (continued)
External load capacitor Cext=330uF Tantalum capacitor, di/dt=2.5A/us
50% to 100% load Transient at 5.0Vdc output
100% to 50% load Transient at 5.0Vdc output
50% to 100% load Transient at 3.3Vdc output
100% to 50% load Transient at 3.3Vdc output
50% to 100% load Transient 0.75Vdc output
100% to 50% load Transient at 0.75Vdc output
Note: All specifications are typical at 12Vdc input and Ta=25 deg 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
8.3 V-14 V Input 0.75 V-5.5 V/16 A Output
Efficiency Data
Module 5.0V 0.98 0.96 0.94 0.92 0.9 0.88 0.86 0.84 2.0
Module 3.3V 0.96 Efficiency
8.3V 12.0V 13.2V
0.94 0.92 0.9 0.88 0.86 0.84 2.0 8.3V 12.0V 14.0V
Efficiency
4.0
6.0
8.0
10.0
12.0
14.0
16.0
4.0
6.0
8.0
10.0
12.0
14.0
16.0
Output Current
Output Current
Module 2.5V 96.0% 94.0% 92.0% 90.0% 88.0% 86.0% 84.0% 2.0 4.0 6.0 8.0 10.0 12.0 14.0 16.0 Output current
0.94 0.92 0.9 0.88 0.86 0.84 0.82 0.8 2 4 6
Module 1.8V
Efficiency
8.3V 12.0V 14.0V
8.3V 12.0V 14.0V
8
10
12
14
16
Module 1.5V 0.94 0.92 0.9 0.88 0.86 0.84 0.82 0.8 0.78 2 4 6 8 10 12 14 16
Module 1.2V 0.92 0.9 0.88 0.86 0.84 0.82 0.8 0.78 0.76 2 4 6 8 10 12 14 16
8.3V 12.0V 14.0V
8.3V 12.0V 14.0V
Module 0.75V 0.9 0.85 0.8 0.75 0.7 0.65 0.6 0.55 0.5 2 4 6 8 10 12 14 16
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-5.5 V/16 A Output
Thermal Derating Curves
Vo=0.75 V; Vin=12.0 V
Vo=1.8 V; Vin=12.0 V
Vo=3.3 V; Vin=12.0 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-5.5 V/16 A Output
Mechanical Outline
Pin Connections
Pin 1 2 3 4 5 6 7 8 9 10 11 Function Vo Vo Sense+ Vo Ground Ground Vin Vin SEQ Trim Remote On/Off
RoHS Compliance
Complies with the European Directive 2002/95/EC, calling for the elimination of lead and other hazardous substances from electronic products.
(c)2006 Bel Fuse Inc. Specifications subject to change without notice. 020706
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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