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NON-ISOLATED DC/DC CONVERTERS
8.3 Vdc - 14 Vdc Input 0.75 Vdc - 5.5 Vdc/16 A Output
VRBC-16A1AX
* * * * * * * * * Non-Isolated High Efficiency High Power Density
RoHS Compliant
* * * * * * * *
Rev.A
Under-voltage Lockout (UVLO) Over Temperature Shutdown OCP/SCP Wide Input Wide Trim Remote On/Off Active Low/High (option) Remote Sense
Excellent Thermal Performance Low Cost Fixed Frequency Able to Sink & Source Current Vout Prebias Industrial Temperature Range
Description
The Bel VRBC-16A1AX is part of the non-isolated dc/dc converter Power Module series. The modules use a SIP package. These converters are available in a range of output voltages from 0.75 Vdc to 5.0 Vdc over a wide range of input voltage (Vin = 8.3 Vdc - 14 Vdc).The efficiency is typically 92% at 3.3 Vout 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-16A1AL Model Number Active High VRBC-16A1A0
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. 3. All part numbers above indicate RoHS 6. Change the second letter "R" to "7" for RoHS 5 part numbers.
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 Vdc - 14 Vdc Input 0.75 Vdc - 5.5 Vdc/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 Input Reflected Ripple Current (rms) Input Reflected Ripple Current (pk-pk) I t Inrush Current Transient Turn-on Voltage Threshold Turn-off Voltage Threshold
2 1
Min 8.3 V 8.3 V -
Typ 12 V 12 V 100 mA 2 mA 0.2 A s 7.8 V 7.3 V
2
Max 14 V 13.2 V 11 A 150 mA 400 mA 0.4 A s 2
Notes
With simulated source impedance of 1000 nH, 5 Hz to 20 MHz, use a 1000 uF/25 V AL-Cap with ESR=0.03 ohm max and 6 x 47 uF/16 V tantalum cap with ESR=0.013 ohm max, at 100 kHz
Notes: 1.This power module is not internally fused. An input line fuse must always be used. All specifications are typical at 25 C unless otherwise stated.
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 330 uF tantalum capacitors at the output Min -2% Vo,set 0A 0 uF Typ 0.2% Vo,set 0.3% Vo,set 0.3% Vo,set 180% Io,out 1A s 50 mV 30 mV 8 mS 2
Max 2% Vo,set 16 A 3A s 100 mV 45 mV 20 mS 1% Vo,set 5000 uF
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 ceramic capacitor at the output
ESR10 mohm
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 Vdc - 14 Vdc Input 0.75 Vdc - 5.5 Vdc/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% load; 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) Min -0.2 V -0.2 V 2.5 V Typ Max 0.3 V Vin, max 0.3 V Vin, max Notes VRBC-16A1A0; Remote On/Off pin open, Unit on. VRBC-16A1AL; 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 Vdc - 14 Vdc Input 0.75 Vdc - 5.5 Vdc/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.
GND
Vin
R
Vin
Module
Remote On/Off
Q1
GND
Output Trim Equations
Equation for calculating the trim resistor given the desired output voltage (Vo) is shown below. Rtrim is the required resistance between the trim pin and GND pin, Vtrim is the required voltage between the trim and GND pin.
10500 R trim = - 1000 Vo - 0 . 7525
Vo (V) 0.7525 1.2 1.5 1.8 2.5 3.3 5.0 Rtrim (K) Open 22.46 13.05 9.024 5.009 3.122 1.472
Vout
Sense
Module
trim
Rtrim
GND
Vtrim={0.7 -0.0667x(Vo-0.7525)}
Vo (V) 0.7525 1.2 1.5 1.8 2.5 3.3 5.0 Vtrim (V) Open 0.67 0.65 0.63 0.583 0.53 0.42
Vout
Sense
Module
trim
Vtrim
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 Vdc - 14 Vdc Input 0.75 Vdc - 5.5 Vdc/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 Vdc - 14 Vdc Input 0.75 Vdc - 5.5 Vdc/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 Vdc - 14 Vdc Input 0.75 Vdc - 5.5 Vdc/16 A Output
Ripple and Noise Waveforms
Ripple and noise at full load, 12 Vdc input, 5.0 Vdc output
Ripple and noise at full load, 12 Vdc input, 3.3 Vdc output
Ripple and noise at full load, 12 Vdc input, 0.75 Vdc output Note: External load with 10uF tantalum capacitor and 1uF ceramic at the output, 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 Vdc - 14 Vdc Input 0.75 Vdc - 5.5 Vdc/16 A Output
Transient Response Waveforms
External load capacitor Cext=0 uF, di/dt=2.5 A/us
50% to 100% load Transient at 5.0 Vdc output
100% to 50% load Transient at 5.0 Vdc output
50% to 100% load Transient at 3.3 Vdc output
100% to 50% load Transient at 3.3 Vdc output
50% to 100% load Transient 0.75 Vdc output
100% to 50% load Transient at 0.75 Vdc 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 Vdc - 14 Vdc Input 0.75 Vdc - 5.5 Vdc/16 A Output
Transient Response (continued)
External load capacitor Cext=330 uF Tantalum capacitor, di/dt=2.5 A/us
50% to 100% load Transient at 5.0 Vdc output
100% to 50% load Transient at 5.0 Vdc output
50% to 100% load Transient at 3.3 Vdc output
100% to 50% load Transient at 3.3 Vdc output
50% to 100% load Transient 0.75 Vdc output
100% to 50% load Transient at 0.75 Vdc 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 Vdc - 14 Vdc Input 0.75 Vdc - 5.5 Vdc/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 N/A 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)2007 Bel Fuse Inc. Specifications subject to change without notice. 011607
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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