ISOLATED DC/DC CONVERTERS
48 Vdc Input 12 Vdc/12 A, 3.3 Vdc/46 A, 5 Vdc/30 A, 1.2-2.5 Vdc/50 A Outputs
May 17, 2011
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Part Number Explanation
0 R QB – C5 T xx x
1
2
3
4
5
6 7
1---Through hole
2---RoHS 6, change “R” to “7” means RoHS 5
3---Series name, 1/4 Brick
4---Series code
5---Input range 48V wide (36-75V)
6---Output voltage
7---Option, “x” of the model part number to be 0-9, A-Z, which will represent the special request of
customer.
Absolute Maximum Ratings
Unit
Parameter
Input Voltage (continuous)
Remote On/Off
Min
-0.3
-0.3
-
Typ
Max
80
Notes
-
-
-
-
-
V
V
18
I/O Isolation Voltage
Ambient Temperature
Storage Temperature
2000
85
V
-40
-55
C
C
125
Note: All specifications are typical at nominal input, full load at 25 C unless noted.
Input Specifications
Parameter
Min
Typ
Max
Unit
Notes
Input Voltage
Input Current (full load)
36
48
75
V
VO=12 V
VO=5.0 V
VO=3.3 V
VO=2.5 V
VO=1.8 V
VO=1.5 V
VO=1.2 V
-
-
-
-
-
-
-
-
-
-
-
-
-
-
4.5
4.9
4.9
4.1
3.0
2.6
2.1
A
A
A
A
A
A
A
Input Current (no load)
-
120
10
180
15
mA
mA
Remote Off Input Current
Tested with simulated source
impedance of 10 uH, 5 Hz to 20 MHz;
use a 100 uF /100 V electrolytic
capacitor with ESR = 1 ohm max. at
200 kHz at 25 C.
Input Reflected Ripple Current
(pk-pk)
-
-
10
15
3
mA
Input Reflected Ripple Current
(rms)
1.5
mA
I2t Inrush Current Transient
Turn-on Voltage Threshold
Turn-off Voltage Threshold
Input over voltage Lockout
-
0.05
34
0.1
35
34
80
A2s
V
32
30
76
32
V
78
V
Note: All specifications are typical at nominal input, full load at 25 C unless noted.
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com
2