NON-ISOLATED DC/DC CONVERTERS
8.3 Vdc - 14 Vdc Input
VRBC-10A2Ax
0.75 Vdc - 5.0 Vdc/10 A Output
RoHS Compliant
Rev.A
•
Non-Isolated
•
Under-Voltage Lockout (UVLO)
•
Fixed Frequency
•
Over Temperature Shutdown
•
High Efficiency
•
OCP/SCP
•
Low Cost
•
Wide Trim
•
Wide Input
•
Remote Sense
•
Flexible Output Voltage
Sequencing
•
Remote On/Off
•
Active Low/High (Option)
Output Voltage Prebias
•
Industrial Temperature Range
•
Description
The Bel VRBC-10A2Ax are series of the non-isolated dc/dc converter Power Module. 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 Bel VRBC-10A2Ax has a sequencing feature that enables
designers to implement various types of output voltage sequencing when powering. The efficiency is typically
95% at 5 Vdc output at full load.
Part Selection
Output
Voltage
Input
Voltage
Max. Output
Current
Max. Output
Power
Typical
Efficiency
Model Number
Active Low
Model Number
Active High
0.75 V - 5.0 V
8.3 V - 14 V
10 A
50.0 W
95%
VRBC-10A2AL
VRBC-10A2A0
Notes: 1. Add “G” suffix at the end of the model number to indicate Tray Packaging.
2. All part numbers above indicate RoHS 6. Change the second letter "R" to "7" for RoHS 5 part numbers.
Absolute Maximum Ratings
Min
Typ
Max
Input Voltage (continuous)
Parameter
-0.3 V
-
15 V
Output Enable Terminal Voltage
-0.3 V
-
15 V
1
-0.3 V
-
Vin
Ambient Temperature
-40 °C
-
85 °C
Storage Temperature
-55 °C
-
125 °C
Sequencing Voltage
Notes
Notes: All specifications are typical at 25 °C unless otherwise stated.
1. VRBC-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 Vdc - 14 Vdc Input
0.75 Vdc - 5.0 Vdc/10 A Output
Input Specifications
Parameter
Min
Typ
Max
Notes
8.3 V
8.3 V
12 V
12 V
14 V
13.2 V
Input Current (full load)
-
-
6.5 A
Input Current (no load)
-
80 mA
-
Remote Off Input Current
-
2 mA
-
Input Reflected Ripple Current (pk-pk)
-
-
100 mA
Input Reflected Ripple Current (rms)
-
-
30 mA
I t Inrush Current Transient
-
0.2 A s
Turn-on Voltage Threshold
-
7.9 V
Turn-off Voltage Threshold
-
7.8 V
Input Voltage
Vo, set ≤ 3.63 V
Vo, set > 3.63 V
2
2
An input line fuse must always be
used.
Tested with one 1000 uF/25 V AL
input capacitor with ESR=0.03 ohm
max and 4 × 47 uF/25 V tan
capacitors with ESR=0.013 ohm max
at 100 kHz, & simulated source
impedance of 1000 nH, 5 Hz to
20 MHz.
2
0.4 A s
Note: All specifications are typical at 25 °C unless otherwise stated.
Output Specifications
Parameter
Output Voltage Set Point
Min
-2% Vo,set
Typ
-
Max
2% Vo,set
Load Regulation
-
0.3% Vo,set
-
Line Regulation
Regulation Over Temperature
(-40 °C to +85 °C)
Output Current
-
0.2% Vo,set
-
-
0.4% Vo,set
-
0A
-
10 A
-
200% Io
Current Limit Threshold
2
Tref=Tamin to Tamax
2
Short Circuit Surge Transient
-
1A s
3A s
Ripple and Noise (pk-pk)
-
40 mV
100 mV
Ripple and Noise (rms)
-
20 mV
40 mV
Turn on Time
-
8 mS
20 mS
Overshoot at Turn on
-
-
1% Vo,set
0 uF
-
5000 uF
Output Capacitance
Notes
Vin=12 V, full load
Tested with 0-20 MHz, with
10 uF tantalum capacitor &
1 uF ceramic capacitor
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 470 uF tantalum
capacitors 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 Vdc - 14 Vdc Input
0.75 Vdc - 5.0 Vdc/10 A Output
General Specifications
Parameter
Min
Typ
Max
-
95%
93%
92%
90%
89%
87.5%
81%
-
265 kHz
300 kHz
335 kHz
-
130 °C
-
0.7525 V
-
5.0 V
-
-
0.5 V
Notes
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
Output Voltage Trim Range
Remote Sense Compensation
MTBF
Measured at Vin=12 V, full load
Calculated Per Bell Core SR-332 (IO = 80%
load; Vo=3.3 V; Vin=12 V; Ta = 25°C)
5,114,191 hours
Dimensions
Inches (L × W × H)
Millimeters (L × W × H)
2.0 x 0.5 x 0.32
50.8 x 12.7 x 8.13
Weight
-
7.1 g
-
Notes: All specifications are typical at 25 °C unless otherwise stated.
1. The Tref temperature measurement location:
Control Specifications
Parameter
Min
Typ
Max
Notes
Signal Low (Unit Off)
-0.2 V
-
0.3 V
Signal High (Unit On)
-
-
Vin, max
VRBC-10A2A0; Remote On/Off pin open, Unit
on.
Signal Low (Unit On)
-0.2 V
-
0.3 V
Signal High (Unit Off)
2.5 V
-
Vin, max
25 mS
-
-
-
-
2 V/mS
-
100 mV
200 mV
200 mV
400 mV
Remote On/Off
VRBC-10A2AL; Remote On/Off pin open, Unit
on.
Voltage Sequencing
Sequencing Delay Time
Sequencing Slew Rate Capability
Tracking Accuracy
Power-Up
Power-Down
Delay from Vin, min to application of voltage
on SEQ pin
Vinmin to Vinmax; Iomin to Iomax; Vseq<Vo
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 - 5.0 Vdc/10 A Output
Output Trim Equations
Equation for calculating the trim resistor (in Ω) given the desired output voltage (Vo) is shown below. The Rtrim
resistor should be connected between the trim pin and GND.
Vout
10500
⎡
⎤
R trim = ⎢
− 1000 ⎥
⎣ Vo − 0 . 7525
⎦
Sense
Module
trim
Rtrim
GND
Equation for calculating the trim voltage (in V) given the desired output voltage (Vo) is shown below. The Vtrim
voltage should be connected between the trim pin and GND.
Vout
Vtrim= {0.7−0.0667×(Vo−0.7525)}
Sense
Module
trim
Vtrim
GND
Thermal Derating Curve
Vin=12 V, Vo=3.3 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 - 5.0 Vdc/10 A Output
Efficiency Data
Module 5.0 V
Efficiency
100.0%
90.0%
80.0%
8.3 V
12.0 V
70.0%
14.0 V
60.0%
1A
2.5 A
5A
7.5 A
10 A
Output current
Efficiency
Module 3.3V
100.0%
90.0%
80.0%
70.0%
60.0%
8.3 V
12.0 V
14.0 V
1A
2.5 A
5A
7.5 A
10 A
Output current
Module 0.75V
Efficiency
90.0%
80.0%
8.3 V
70.0%
12.0 V
60.0%
14.0 V
50.0%
1A
2.5 A
5A
7.5 A
10 A
Output current
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 - 5.0 Vdc/10 A Output
Ripple and Noise Waveforms
12 Vdc input, 0.75 V output
12 Vdc input, 3.3 V output
12 Vdc input, 5.0 V output
Note: Ripple and Noise at full load, with 10 uF tantalum capacitor and 1 uF ceramic capacitor 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 - 5.0 Vdc/10 A Output
Transient Response Waveforms
Transients 50% to 100% load 0.75 Vdc output
Transients 100% to 50% load 0.75 Vdc output
Transients 50% to 100% load 3.3 Vdc output
Transients 100% to 50% load 3.3 Vdc output
Transients 50% to 100% load 5.0 Vdc output
Transients 100% to 50% load 5.0 Vdc output
Note: Transient response at 12 V input, di/dt=2.5 A/uS, with external 470 uF tantalum capacitor at the output,
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 - 5.0 Vdc/10 A Output
Mechanical Outline
Pin Connections
Pin
Function
1
Vo
2
Vo
3
Vo, sense
4
Vo
5
GND
6
GND
7
Vin
8
Vin
9
SEQ
10
TRIM
11
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.
©2007 Bel Fuse Inc. Specifications subject to change without notice. 011707
CORPORATE
FAR EAST
EUROPE
Bel Fuse Inc.
206 Van Vorst Street
Jersey City, NJ 07302
Tel 201-432-0463
Fax 201-432-9542
www.belfuse.com
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
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