Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302
Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com
2
ISOLATED DC/DC CONVERTERS
48 Vdc Input
3.3 Vdc /15 A Output, 1/8 Brick Converter
Nov. 30, 2010
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Absolute Maximum Ratings
Parameter
Min
Typ
Max
Unit
Notes
Input Voltage (continuous)
-0.3
-
80
V
Remote On/Off
-0.3
-
18
V
I/O Isolation Voltage
-
1500
V
Input to Each Output Resistance
10
-
M ohm
Ambient Temperature
-40
-
85
°C
Storage Temperature
-55
-
125
°C
Note: Ratings used beyond the maximum ratings may cause a reliability degradation of the converter or may
permanently damage the device.
Input Specifications
Parameter
Min
Typ
Max
Unit
Notes
Input Voltage
36
48
75
V
Input Current (full load)
-
1.8
A
Input Current (no load)
-
80
mA
Input Reflected Ripple Current
(pk-pk)
-
15
mA
Tested with simulated source
impedance of 10 uH, 5 Hz to 20 MHz;
use a 47 uF/100 V electrolytic
capacitor with ESR = 1 ohm max. at
200 kHz at 25
°C.
Input Fuse (not internally)
-
5.0
A
I
2t Inrush Current Transient
-
0.1
A
2s
Turn-on Voltage Threshold
32
-
35
V
Turn-off Voltage Threshold
28.5
-
31.7
V
Note: All specifications are typical at 25
°C unless otherwise stated.
Output Specifications (continued)
Parameter
Min
Typ
Max
Unit
Notes
Output Voltage Range
3.201
3.3
3.399
V
Over all line, load & temperature
conditions.
Output Voltage Trim Range
2.97
-
3.63
V
Output Over-Voltage Clamp Non-Latching
3.69
-
4.62
V
Output Current
-
15
A
Current Limit Threshold
15.2
-
26
A
External Admissible Capacitive Load
0
-
10000
uF
Ripple and Noise (pk-pk)
-
130
mV
Vin=72 V, max load on output, 20
MHz BW, 10uF tantalum and 1uF
ceramic capacitor.
Turn on Time
-
220
mS
Rise Time
-
15
mS
Transient Response
Vpk-pk
-
230
mV
50% ~ 75% ~ 50%
Max Load
Settling Time
-
200
uS
di/dt=0.1A/us, Vin=48Vdc,
Ta=25°C, with a 1F ceramic
capacitor and a 10uF Tantalum
cap at the output.cap at the
output.
Note: All specifications are typical at nominal input, full load at 25°C unless otherwise stated.