Bel Fuse Inc.

206 Van Vorst Street, Jersey City, NJ 07302

3

ISOLATED DC/DC CONVERTERS

24 Vdc Input

12 Vdc /20 A Output

Sep. 11, 2010

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

Output Specifications (continued)

Parameter

Min

Typ

Max

Unit

Notes

Output Current Range

0

-

20

A

Output DC Current Limit

22

26

30

A

Short Circuit Surge Transient

-

-

5

A

Rise time

8

-

12

ms

25

35

mS

Enable form Vin

Turn on Time

-

25

35

mS

Enable form ON/OFF

Overshoot at Turn on

-

0

3

%

Output Capacitance

0

-

5000

uF

Transient Response

Overshoot

-

300

400

mV

△

V50%~75% of

Max Load

Settling Time

-

120

200

uS

Overshoot

-

300

400

mV

△

V75%~50% of

Max Load

Settling Time

-

120

200

uS

di/dt=0.1A/us, Vin=24Vdc, Ta=25°C,

with a 1µF ceramic capacitor and a

10uF Tantalum cap at the output.

Note:

All specifications are typical at nominal input, full load at 25°C unless otherwise stated.

General Specifications

Parameter

Min

Typ

Max

Unit

Notes

Efficiency

94

94.5

-

%

Vin=24V, full load

Switching Frequency

-

307

-

kHz

Over Temperature Protection

-

125

130

°C

Over Voltage Protection(Static)

-

14.15

14.5

V

This voltage is achieved by trimming

up output slowly

Weight

-

75

-

g

FIT

362.8

-

Calculated Per Bell Core SR-332

(Vin=24 V, Vo=12 V, Io=7 A,

Ta = 25°C, FIT=109/MTBF)

Dimensions

Inches (L × W × H)

Millimeters (L × W × H)

2.30 x 1.45 x 0.50

58.42 x 36.83 x 12.70

-

Isolation characteristics

Input to Output

-

-

1500

V

Input to Case

-

-

1500

V

Output to Case

-

-

500

V

Isolation Resistance

10M

-

ohm

Isolation Capacitance

-

3900

-

pF

Note