NON-ISOLATED DC/DC CONVERTERS
8 Vdc - 14 Vdc Input 0.8 Vdc - 3.63 Vdc / 30 A Outputs
SRBG-30A1Ax RoHS Compliant
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•
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Non-Isolated
Fixed Frequency
High Efficiency
Wide Trim
Low Cost
Remote Sense
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PRELIMINARY
Rev.B
Input Under Voltage Lockout
Over Temperature Shutdown
Short Circuit Protection
Remote On/Off
Industrial Temperature Range
Description
The Bel SRBG-30A1Ax is part of the non-isolated dc/dc converter Power Module series. The modules use a SMT
package. These converters are available in a range of output voltages from 0.8 Vdc to 3.63 Vdc over a wide range
of input voltage (Vin = 8 Vdc - 14 Vdc).The efficiency is typically 92% at 12 Vdc input and 3.3 Vdc output at full
load. Replace "x" in the part number with "0" or "C" depending on you specific application and specific external
capacitor bank.
Part Selection
Output Voltage
0.8 Vdc - 3.3 Vdc
0.8 Vdc - 3.3 Vdc
Input Voltage
8 Vdc - 14 Vdc
8 Vdc - 14 Vdc
Max. Output
Current
30 A
30 A
Max. Output
Power
99 W
99 W
Typical
Efficiency
92%
92%
Model Number
SRBG-30A1A0
SRBG-30A1AC
Notes:
1. Add “G” or “R” suffix at the end of the model number to indicate Tray or Tape and Reel packaging.
2. All part numbers above indicate RoHS 6. Change the second letter "R" to "7" for RoHS 5 part numbers.
3. See the last page for model number differences.
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
Input Specifications
Parameter
Input Voltage
Input Current (full load)
Input Current (no load)
Remote Off Input Current
Input Reflected Ripple Current (pk-pk)
Input Reflected Ripple Current (rms)
I t Inrush Current Transient
Turn On Voltage Threshold
Turn Off Voltage Threshold
2
Min
8V
-
-
-
-
-
-
-
-
Typ
12 V
-
270 mA
2 mA
20 mA
10 mA
-
7.2 V
6.9 V
Max
14 V
15 A
400 mA
-
50 mA
30 mA
1As
-
-
2
Notes
With a 1000 uF AL-Cap at the input.
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 Vdc - 14 Vdc Input 0.8 Vdc - 3.63 Vdc / 30 A Outputs
Output Specifications
Parameter
Output Voltage Set Point
Line Regulation
Load Regulation
Temperature Regulation
(-40
°C
to +85
°C)
Ripple and Noise (rms)
Ripple and Noise (pk-pk)
Output Current
Short Circuit Surge Transient
Turn on Time
Overshoot at Turn On
Output Capacitance
Transient Response
50% ~ 75%
Max Load
75% ~ 50%
Max Load
Overshoot
Settling Time
Overshoot
Settling Time
Vo=3.3 V
-
-
-
-
90 mV
25 uS
90 mV
25 uS
180 mV
70 uS
180 mV
70 uS
di/dt=0.5 A/us, Vin=12 Vdc,
with a 22 uF ceramic
capacitor and a 150 uF
tantalum at the output.
Min
-1.5%Vo, set
-
-
-
-
-
0A
-
-
-
150 uF
Typ
-
-
-
-
20 mV
60 mV
-
1A s
4 mS
-
-
2
Max
1.5%Vo, set
0.2%Vo, set
1.5%Vo, set
1%Vo, set
60 mV
150 mV
30 A
3A s
20 mS
5%
10000 uF
2
Notes
V
in
=12 V, I
O
=half load
0-20 MHz BW, with a 22 µF
ceramic capacitor and a
150 uF tantalum capacitor at
the output.
Note:
All specifications are typical at nominal input, full load at 25
°C
unless otherwise stated.
General Specifications
Parameter
Efficiency
Vo=0.8 V
Vo=3.3 V
Switching Frequency
Output Voltage Trim Range
Over Temperature Shutdown
Remote Sense Compensation
MTBF
Dimensions
Inches (L
×
W
×
H)
Millimeters (L
×
W
×
H)
Weight
-
1.3 x 0.53 x 0.437
33.02 x 13.46 x 11.10
TBD
-
77%
89%
-
0.8 V
-
-
80%
92%
600 kHz
-
130
°C
-
TBD
-
-
-
3.63 V
-
0.5 V
Calculated Per Bell Core SR-332
(Vin=12 V, Vo=3.3 V, I
O
=80%load; T
a
=
25
°C)
Vin=12 V, full load
Min
Typ
Max
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 Vdc - 14 Vdc Input 0.8 Vdc - 3.63 Vdc / 30 A Outputs
Control Specifications
Parameter
Remote On/Off
Signal Low (Unit Off)
Signal High (Unit On)
-0.3 V
2.8 V
-
-
0.8 V
Vin, max
Remote on/off pin open, unit on
Min
Typ
Max
Notes
Remote Enable Specifications
The SRBG-30A1Ax modules feature an enable
pin with Positive logic. If not using the enable
pin, leave the pin open (the module will be on).
During logic_high, the module is turned on,
during logic_low, the module is turned off. It
inner circuit impedance is showed as the figure.
Output Trim Equations
Equations for calculating the trim resistor are shown below (Unit:
Ω).
The Trim resistor should be connected
between the Trim pin and Ground pin.
Vout
R
trim
⎤
⎡
9680
= ⎢
−
715
⎥
⎦
⎣
Vo
−
0 . 8
Sense
Module
trim
Rtrim
GND
Vo is the desired output voltage
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 Vdc - 14 Vdc Input 0.8 Vdc - 3.63 Vdc / 30 A Outputs
Efficiency Data
Module 0.8V
85.0%
80.0%
75.0%
efficiency
70.0%
65.0%
60.0%
55.0%
50.0%
45.0%
3A
7.5A
15A
output current
22.5A
30A
8V
12.0V
14.0V
Module 3.3V
95.0%
90.0%
efficiency
85.0%
80.0%
75.0%
70.0%
3A
7.5A
15A
output current
22.5A
30A
8V
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 Vdc - 14 Vdc Input 0.8 Vdc - 3.63 Vdc / 30 A Outputs
Thermal Derating Curves
Vo=0.8 V
Vo=3.3 V
Ripple and Noise Waveforms
Vo=0.8 V
Vo=3.3 V
Note:
Ripple and noise at full load, 12 V input, external load with 150 uF tantalum capacitor and 22 uF ceramic
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
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