ISOLATED DC/DC CONVERTERS
48 Vdc Input 12 Vdc / 33 A Output
Dec. 10, 2010
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Absolute Maximum Ratings
Unit
V
Parameter
Min
-0.3
-
Typ
Max
75
Notes
Input Voltage (continuous)
Input voltage Transient protection
Remote On/Off
-
-
-
-
-
-
100
18
V
Operating for 100mS
-0.3
-
V
I/O Isolation Voltage
1500
85
V
Ambient Temperature
Storage Temperature
-40
-55
°C
°C
125
Note: All specifications are typical at 25 °C unless otherwise stated.
Input Specifications
Parameter
Min
Typ
Max
Unit
Notes
Input Voltage
36
48
75
V
Input Current (full load)
Input Current (no load)
Remote Off Input Current
-
-
-
-
13
150
20
A
80
10
mA
mA
Input Reflected Ripple Current
(pk-pk)
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.
-
-
20
5
30
10
mA
Input Reflected Ripple Current
(rms)
mA
I2t Inrush Current Transient
Turn-on Voltage Threshold
Turn-off Voltage Threshold
-
-
1
A2s
V
33
34.5
33.5
35.5
35
32.5
V
Notes: 1. Should place at least 220uF/100V electrolytic capacitor directly adjacent to the input pin of the module.
2. All specifications are typical at nominal input, full load at 25 °C unless otherwise stated.
Output Specifications
Parameter
Min
Typ
Max
Unit
Notes
Output Voltage Set Point
11.5
12
12.5
V
Vin=48 V, Io=50%Load.
Load Regulation
Line Regulation
-
-
±150
±80
±300
±130
mV
mV
Regulation Over Temperature
(-40 °C to 85 °C)
-
±150
±250
mV
0 - 20 MHz BW, with a 1 uF ceramic
capacitor and a 10 uF tantalum
capacitor at the output.
Ripple and Noise (pk-pk)
Ripple and Noise (rms)
Output Current Range
-
-
85
25
-
120
50
33
44
5
mV
mV
A
0
34
-
Output DC Current Limit
Short Circuit Surge Transient
38
-
A
A2s
-
30
10
60
35
mS Enable form Vin
Turn on Time
-
mS Enable form ON/OFF
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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