Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302

2

ISOLATED DC/DC CONVERTERS

48 Vdc Input

1.2 Vdc /50 A Output

Aug. 10, 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

Input Voltage (transient)

-

-

100

V

100mS maximum

Remote On/Off

-0.3

-

18

V

I/O Isolation Voltage

1500

-

-

V

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 Voltage Transient Rate

-

-

7

V/mS

Input Current (full load)

-

-

3.0

A

Input Current (no load)

-

-

60

mA

Remote Off Input Current

-

10

15

mA

Input Reflected Ripple Current

(rms)

-

5

10

mA

Input Reflected Ripple Current

(pk-pk)

-

-

30

mA

With simulated source impedance of

10 uH, 5Hz to 20MHz. Use a 100

uF/100 V electrolytic cap with ESR=1

ohm max, at 200 KHz@25°C.

I

-

-

0.1

A

Turn-on Voltage Threshold

33

-

35.5

V

Turn-off Voltage Threshold

32

-

34.5

V

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

1.176

1.20

1.224

V

Vin=48 V, Io=50%load

Load Regulation

-

±3

±6

mV

Line Regulation

-

±3

±5

mV

Regulation Over Temperature

(-40deg.C-85deg.C)

-

±4

±9

mV

Total Regulation

-

±10

±19

mV

Ripple and Noise (rms)

-

-

10

mV

Ripple and Noise (pk-pk)

-

-

50

mV

Vin=75 V, 0-20MHz BW, with a 1µF

ceramic capacitor and a 100 µF

Tantalum cap at output.

Output Current Range

0

-

50

A