ISOLATED DC/DC CONVERTERS
36 Vdc - 80 Vdc Input,
3.3 Vdc/3 A Output
Aug. 13, 2010
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Absolute Maximum Ratings
Unit
Parameter
Min
Typ
Max
Notes
Continuous non-operating Input
Voltage
-0.3
-
85
V
Transient Input Voltage
Remote On/Off
-
-
-
-
-
-
100
18
V
V
100mS
-0.3
-
I/O Isolation Voltage
Ambient Temperature
Storage Temperature
1500
85
V
-40
-55
°C
°C
125
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
Operating Input Voltage
36
48
80
V
Input Current (full load)
Input Current (no load)
Remote Off Input Current
-
-
-
-
0.4
30
10
A
Test at 36Vdc
20
5
mA
mA
Input Reflected Ripple Current
(rms)
With simulated source impedance of
10uH, 5Hz to 20MHz. Use a
100uF/100V electrolytic capacitor with
ESR=1 ohm max, at 200KHz@25°C.
-
-
5
10
30
mA
Input Reflected Ripple Current
(pk-pk)
15
mA
I2t Inrush Current Transient
Turn-on Voltage Threshold
Turn-off Voltage Threshold
Other information:
-
0.05
32
0.1
33
32
A2s
V
31
30
31
V
Input C-L-C filter
0.1uF+10uH+0.47uF
1
Recommended input fast-acting
fuse on system board
A
CAUTION: This converter is not internally fused. An input line fuse must be used in application.
Note: All specifications are typical at 25 °C unless otherwise stated.
Output Specifications
Parameter
Min
Typ
Max
Unit
Notes
Output Voltage Set Point
3.234
3.3
3.366
V
Vin=48V, Io=50% load
Load Regulation
Line Regulation
-
-
±6
±3
±10
±6
mV
mV
Regulation Over Temperature
(-40deg.C-85deg.C)
-
-
-
±33
3
±60
5
mV
V%
mV
Over all line, load & temperature
conditions
Total Output Voltage Variation
Ripple and Noise (pk-pk)
0-20MHz BW, with a 1µF ceramic
capacitor and a 10uF Tantalum
70
120
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
2