NON-ISOLATED DC/DC CONVERTERS
10 Vdc - 14 Vdc Input
1.2 Vdc - 5.0 Vdc/10 A Outputs
SRBC-10Axx0
•
•
•
•
•
•
Non-Isolated
High Efficiency
High Power Density
RoHS Compliant
•
•
•
•
•
Rev.A
Under-voltage Lockout (UVLO)
Over Temperature Protection
OCP/SCP
Remote On/Off
Industrial Temperature Range
Excellent Thermal Performance
Low Cost
Remote Sense
Description
The Bel SRBC-10Axx0 modules are a series of non-isolated dc/dc converters that deliver up to 10 A of output
current with full load efficiency of 93% at 3.3 Vdc output. The open-frame construction and small footprint enable
designers to develop cost and space-efficient solutions. Standard features include remote On/Off, over current
protection, short current protection, and wide input.
Part Selection
Output
Voltage
5.0 V
3.3 V
2.5 V
1.8 V
1.5 V
1.2 V
Input Voltage
10 V - 14 V
10 V - 14 V
10 V - 14 V
10 V - 14 V
10 V - 14 V
10 V - 14 V
Max. Output
Current
10 A
10 A
10 A
10 A
10 A
10 A
Max. Output
Power
50.0 W
33.0 W
25.0 W
18.0 W
15.0 W
12.0 W
Typical
Efficiency
95%
93%
92%
90%
89%
87.5%
Model Number
Active High
SRBC-10A500
SRBC-10A330
SRBC-10A250
SRBC-10A180
SRBC-10A150
SRBC-10A120
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
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
10 Vdc - 14 Vdc Input
1.2 Vdc - 5.0 Vdc/10 A Outputs
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
1.2 V - 3.3 V
5.0 V
Turn-off Voltage Threshold
1.2 V - 3.3 V
5.0 V
2
Min
10 V
-
-
-
-
-
-
-
-
6.7 V
8.0 V
Typ
-
-
-
3 mA
100 mA
50 mA
0.05 A s
7.8 V
9.4 V
-
-
2
Max
14 V
5.7 A
60 mA
10 mA
-
-
0.1 A s
-
-
7.9 V
9.0 V
2
Notes
An input line fuse must always be used.
Tested with one 1000 uF/25 V Electrolytic
capacitor and four 47 uF tan capacitors
and one 1 uH inductor at the input.
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
= 1.2 V -5.0 V
-
-
-
-
200 mV
25 uS
200 mV
25 uS
-
-
-
-
di/dt=2.5 A/uS, Vin=12 V
Min
-2% Vo,set
-
-
-
0A
-
-
-
-
-
-
-
Typ
-
10 mV
10 mV
15 mV
-
200% Io
0.5 A s
50 mV
20 mV
7 mS
-
-
2
Max
2% Vo,set
-
-
-
10 A
-
1A s
100 mV
40 mV
10 mS
1% Vo,set
5000 uF
2
Notes
Vin=12 V, full load
Tref=Ta, min to Ta, max
Tested with 0-20 MHz
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
10 Vdc - 14 Vdc Input
1.2 Vdc - 5.0 Vdc/10 A Outputs
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
Switching Frequency
Over Temperature Shutdown
1
Min
-
-
-
-
-
-
265 kHz
-
90% Vo
-
Typ
95%
93%
92%
90%
89%
87.5%
300 kHz
130
°C
-
-
4,982,651 hours
Max
-
-
-
-
-
-
335 kHz
-
110% Vo
110% Vo
Notes
Measured at Vin=12 V, full load
Output Voltage Trim Range
1.5 V - 5.0 V
1.2 V
MTBF
Dimensions
Inches (L
×
W
×
H)
Millimeters (L
×
W
×
H)
Weight
Calculated Per Bell Core SR-332 (I
O
=
80% Io, max; Vo=5.0 V; Vin=12 V; T
a
=
25
°C)
1.3 x 0.53 x 0.315
33.02 x 13.46 x 8.00
-
7.8 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)
-0.3 V
1V
-
-
0.3 V
14 V
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
10 Vdc - 14 Vdc Input
1.2 Vdc - 5.0 Vdc/10 A Outputs
Output Trim Equations
Equations for calculating the trim resistor (in kΩ) given the desired adjusted voltage (Vadj) and the nominal output
voltage of the converter (Vnom) are shown below. The Trim Down resistor should be connected between the
Trim pin and Vout. The Trim Up resistor should be connected between the Trim pin and Ground. Only one of the
resistors should be used for any given application.
R
trimdown
A
=
−
B
V
nom
−
V
adj
Vout
Rtrimdown
Module
Trim
GND
R
trimup
=
V
adj
C
−
D
−
V
nom
Vout
Module
Trim
Rtrimup
GND
Vnom
5.0
3.3
2.5
1.8
1.5
1.2
A
64.6353
39.1049
27.0561
16.5749
12.0693
-
B
16.01
16.01
16.01
16.01
16.01
-
C
10.507
10.507
10.507
10.507
10.507
10.507
D
1
1
1
1
1
1
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
10 Vdc - 14 Vdc Input
1.2 Vdc - 5.0 Vdc/10 A Outputs
Efficiency Data
Module 5.0V
Module 3.3V
95.0%
Efficiency
Efficiency
95.0%
10V
90.0%
85.0%
80.0%
10V
12.0V
14.0V
1A
2.5A
5A
7.5A
Output Current
Module 1.8V
90.0%
85.0%
1A
2.5A
5A
7.5A
Output Current
10A
12.0V
14.0V
10A
Module 2.5V
Efficiency
Efficiency
95.0%
90.0%
85.0%
80.0%
1A
2.5A 5A 7.5A 10A
Output Current
Module 1.5V
8.3V
12.0V
14.0V
95.0%
90.0%
85.0%
80.0%
75.0%
70.0%
1A
2.5A 5A 7.5A 10A
Output Current
Module 1.2V
10V
12.0V
14.0V
95.0%
90.0%
85.0%
80.0%
75.0%
70.0%
1A
10V
12.0V
14.0V
90.0%
80.0%
70.0%
60.0%
50.0%
1A
2.5A 5A 7.5A 10A
Output Current
Efficiency
Efficiency
10V
12.0V
14.0V
2.5A 5A 7.5A 10A
Output Current
Thermal Derating Curve
Bel Fuse Inc.
206 Van Vorst Street, Jersey City, NJ 07302
•
Tel 201-432-0463
•
Fax 201-432-9542
•
www.belfuse.com
