NON-ISOLATED DC/DC CONVERTERS
8.3 Vdc - 14 Vdc Input
0.75 Vdc - 5.0 Vdc/10 A Output
VRBC-10A2Ax
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Non-Isolated
Fixed Frequency
High Efficiency
Low Cost
Wide Input
Flexible Output Voltage
Sequencing
Output Voltage Prebias
RoHS Compliant
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Rev.A
Under-Voltage Lockout (UVLO)
Over Temperature Shutdown
OCP/SCP
Wide Trim
Remote Sense
Remote On/Off
Active Low/High (Option)
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
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
VRBC-10A2AL
Model Number
Active High
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
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-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
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
-
80 mA
2 mA
-
14 V
13.2 V
6.5 A
-
-
100 mA
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.
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
-
-
-
-
-
0.2 A s
7.9 V
7.8 V
2
30 mA
0.4 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
V
O
= 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
Min
-2% Vo,set
-
-
-
0A
-
-
-
-
-
-
0 uF
Typ
-
0.3% Vo,set
0.2% Vo,set
0.4% Vo,set
-
200% Io
1A s
40 mV
20 mV
8 mS
-
-
2
Max
2% Vo,set
-
-
-
10 A
-
3A s
100 mV
40 mV
20 mS
1% Vo,set
5000 uF
2
Notes
Vin=12 V, full load
Tref=Tamin to Tamax
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 Vdc - 14 Vdc Input
0.75 Vdc - 5.0 Vdc/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
×
W
×
H)
Millimeters (L
×
W
×
H)
Weight
-
2.0 x 0.5 x 0.32
50.8 x 12.7 x 8.13
7.1 g
-
1
Min
-
-
-
-
-
-
-
265 kHz
-
0.7525 V
-
Typ
95%
93%
92%
90%
89%
87.5%
81%
300 kHz
130
°C
-
-
5,114,191 hours
Max
-
-
-
-
-
-
-
335 kHz
-
5.0 V
0.5 V
Notes
Measured at Vin=12 V, full load
Calculated Per Bell Core SR-332 (I
O
= 80%
load; Vo=3.3 V; Vin=12 V; T
a
= 25°C)
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
-
-
100 mV
200 mV
200 mV
400 mV
25 mS
-
-
-
-
2 V/mS
Vinmin to Vinmax; Iomin to Iomax; Vseq<Vo
Delay from Vin, min to application of voltage
on SEQ pin
-0.2 V
-
-0.2 V
2.5 V
-
-
-
-
0.3 V
Vin, max
0.3 V
Vin, max
VRBC-10A2A0; Remote On/Off pin open, Unit
on.
VRBC-10A2AL; 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 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
100.0%
Efficiency
90.0%
80.0%
70.0%
60.0%
1A
2.5 A
5A
Output current
7.5 A
10 A
8.3 V
12.0 V
14.0 V
Module 3.3V
100.0%
90.0%
80.0%
70.0%
60.0%
1A
2.5 A
5A
7.5 A
10 A
Output current
Efficiency
8.3 V
12.0 V
14.0 V
Module 0.75V
90.0%
Efficiency
80.0%
70.0%
60.0%
50.0%
1A
2.5 A
5A
Output current
7.5 A
10 A
8.3 V
12.0 V
14.0 V
Bel Fuse Inc.
206 Van Vorst Street, Jersey City, NJ 07302
•
Tel 201-432-0463
•
Fax 201-432-9542
•
www.belfuse.com
