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

2

ISOLATED DC/DC CONVERTERS

36 - 75 Vdc Input

1.8 Vdc /60 A Output

Converter

Feb. 21, 2011

Bel Power Inc., a subsidiary of Bel Fuse Inc.

Absolute Maximum Ratings

Parameter

Min

Typ

Max

Unit

Notes

Continuous Input Voltage

-0.3

-

80

V

Non-operating

Input Transient Voltage

-

-

100

V

100 mS maximum

Remote On/Off

-0.3

-

18

V

I/O Isolation Voltage

-

-

1500

V

Ambient Temperature

-40

-

85

C

Storage Temperature

-55

-

125

C

Input Specifications

Parameter

Min

Typ

Max

Unit

Notes

Operating Input Voltage

36

48

75

V

Input Current (full load)

-

-

4

A

Input Current (no load)

-

70

100

mA

Remote Off Input Current

-

5

10

mA

Input Reflected Ripple Current

(pk-pk)

-

10

20

mA

Input Reflected Ripple Current

(rms)

-

2

7

mA

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

I

-

-

1

A

Turn-on Voltage Threshold

32

34

35

V

Turn-off Voltage Threshold

30

32

34

V

CAUTION: This converter is not internally fused. An input line fuse must be used in application.

Recommend a fast-acting fuse with maximum rating of 5A on system board. Refer to the fuse

manufacture’s datasheet for further information.

Notes: 1. This converter has internal C-L-C (0.47uF-2.2uH-6.6uF) filter.

2. All specifications are typical at 25

C unless otherwise stated.

Output Specifications

Parameter

Min

Typ

Max

Unit

Notes

Output Voltage Set Point

1.764

1.8

1.836

V

Vin=48V, half load

Load Regulation

-

5

10

mV

Vin=48 V, Iout=0-60 A

Line Regulation

-

2

7

mV

Vin=36~75V, full load

Regulation Over Temperature

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

-

-

0.01

%Vo

/C

Ripple and Noise (pk-pk)

-

60

100

mV

Ripple and Noise (rms)

-

15

30

mV

Vin=48V, full load, 0-20MHz BW, with

a 1µF ceramic capacitor and a 10µF

tantalum capacitor at output

Output Ripple and Noise(Pk-Pk)

under worst case

-

-

150

mV

over all operating input voltage, load

and ambient temperature condition

Output Current Range

0

-

60

A