NON-ISOLATED DC/DC CONVERTERS
4.5 Vdc - 14 Vdc Input
0.75 Vdc - 3.63 Vdc/10 A Output
SRBC-10E2Ax
•
•
•
•
•
•
•
Non-Isolated
High Efficiency
Fixed Frequency
Low Cost
Wide Input
Flexible Output Voltage
Sequencing
RoHS Compliant
•
•
•
•
•
•
•
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 SRBC-10E2Ax is part of the non-isolated dc/dc converter series. The modules use a SMT package.
These converters are available in a range of output voltages from 0.75 Vdc to 3.63 Vdc over a wide range of input
voltage (Vin = 4.5 Vdc - 14 Vdc). The Bel SRBC-10E2Ax has a sequencing feature that enables designers to
implement various types of output voltage sequencing when powering. The efficiency is typically 93% at 3.3 Vdc
output at 12 Vdc input at full load.
Part Selection
Output
Voltage
0.75 V - 3.63 V
Input
Voltage
4.5 V - 14 V
Max. Output
Current
10 A
Max. Output
Power
36.3 W
Typical
Efficiency
93%
Model Number
Active Low
SRBC-10E2AL
Model Number
Active High
SRBC-10E2A0
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. SRBC-10E2Ax 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 not using the sequencing feature, either, 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
4.5 Vdc - 14 Vdc Input
0.75 Vdc - 3.63 Vdc/10 A Output
Input Specifications
Parameter
Input Voltage
Vo,set <3.0 V
Vo,set≥3.0 V
Input Current (full load)
Input Current (no load)
Remote Off Input Current
Input Reflected Ripple Current (pk-pk)
4.5 V
Vo,set +1.5 V
-
-
-
-
-
-
-
40 mA
2 mA
-
14 V
14 V
8.6 A
-
-
400 mA
Tested with one 1000 uF/25 V AL
input capacitor with ESR=0.03 ohm
max and 4
×
47 uF/16 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
-
-
-
-
-
0.04 A s
4.3 V
4.0 V
2
150 mA
0.08 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
All output
-
-
-
-
160 mV
50 uS
160 mV
50 uS
-
-
-
-
di/dt=2.5 A/uS; Vin=5 V &
12 V; and with 470 uF
tantalum capacitor at the
output
Min
-2% Vo,set
-
-
-
0A
-
-
-
-
-
-
0 uF
Typ
-
0.1% Vo,set
0.1% Vo,set
0.3 Vo,set
-
200% Io,out
1A s
30 mV
12 mV
8 mS
-
-
2
Max
2% Vo,set
-
-
-
10 A
-
3A s
75 mV
35 mV
20 mS
1%
5600 uF
2
Notes
Vin=12 V, full load
Tref=Ta, min to Ta, max
Tested with 0-20 MHz, with
10 uF tantalum capacitor &
1 uF ceramic capacitor 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
4.5 Vdc - 14 Vdc Input
0.75 Vdc - 3.63 Vdc/10 A Output
General Specifications
Parameter
Efficiency
Vo=3.3 V
Vo=2.5 V
Vo=1.8 V
Vo=1.5 V
Vo=1.2 V
Vo=0.75 V
Efficiency
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
-
1.3 x 0.53 x 0.315
33.02 x 13.46 x 8.00
8g
-
1
Min
-
-
-
-
-
-
-
-
-
-
-
-
265 kHz
-
0.7525 V
-
Typ
92%
91%
89%
88%
86%
80%
93%
92%
90%
89%
87.5%
81%
300 kHz
130
°C
-
-
4,982,651 hours
Max
-
-
-
-
-
-
-
-
-
-
-
-
335 kHz
-
3.63 V
0.5 V
Notes
Measured at Vin=5 V, full load
Measured at Vin=12 V, full load
Calculated Per Bell Core SR-332 (I
O
=80% Io,max; Vo=3.3 V; Vin=12 V; T
a
=
30
°C)
Note:
All specifications are typical at 25
°C
unless otherwise stated.
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
300 mV
200 mV
500 mV
25 mS
-
-
-
-
2 V/mS
Vin, min to Vin, max; Io, min to Io, max;
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
SRBC-10E2A0; Remote On/Off pin open, Unit
on.
SRBC-10E2AL; 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
4.5 Vdc - 14 Vdc Input
0.75 Vdc - 3.63 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 Trim
Up resistor should be connected between the Trim pin and Ground.
Vout
Sense
R
trimup
=
10500
−
1000
Vo
−
0.7525
Module
trim
Rtrim
GND
Equation for calculating the trim voltage (in V) given the desired output voltage (Vo) is shown below. The Trim
Up voltage should be connected between the Trim pin and Ground.
Vout
V
trimup
=
0.7
−
0.0667
×
(
Vo
−
0.7525)
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
4.5 Vdc - 14 Vdc Input
0.75 Vdc - 3.63 Vdc/10 A Output
Efficiency Data
Module 3.3V
100.0%
Efficiency
95.0%
90.0%
85.0%
80.0%
1A
2.5A
5A
Output Current
7.5A
10A
5.0V
12.0V
Efficiency
100.0%
95.0%
90.0%
85.0%
80.0%
1A
2.5A
Module 2.5V
5.0V
12.0V
5A
Output Current
7.5A
10A
Module 1.8V
95.0%
Efficiency
85.0%
80.0%
75.0%
70.0%
1A
2.5A
5A
Output Current
7.5A
10A
Efficiency
95.0%
90.0%
85.0%
80.0%
75.0%
70.0%
1A
2.5A
Module 1.5V
90.0%
5.0V
12.0V
5.0V
12.0V
5A
Output Current
7.5A
10A
Module 1.2V
100.0%
Efficiency
90.0%
80.0%
70.0%
60.0%
50.0%
1A
2.5A
Module 0.75V
90.0%
Efficiency
80.0%
70.0%
60.0%
50.0%
1A
2.5A
5A
Output Current
7.5A
10A
5.0V
12.0V
5.0V
12.0V
5A
Output Current
7.5A
10A
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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