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

3

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.

Output Specifications (continued)

Parameter

Min

Typ

Max

Unit

Notes

Output DC Current Limit

52

-

62

A

Short Circuit Surge Transient

-

2

4

A

Turn on Time

-

-

40

mS

Overshoot at Turn on

-

0

-

%

Output Capacitance

0

-

20,000

uF

Transient Response

Overshoot

-

-

50

mV

25% ~ 50%

Max Load

Settling Time

-

-

250

uS

Overshoot

-

-

50

mV

50% ~ 25%

Max Load

Settling Time

Vo=

1.2V

-

-

250

uS

di/dt=0.1A/us, Vin=48Vdc, with a

1µF ceramic capacitor and a 330 µF

ESR≤50mOhm cap at 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 (full load)

84

86

-

%

Efficiency (half load)

85

89

-

%

Measured at Vin=48 V

Switching Frequency

270

300

330

kHz

Isolation capacitance

-

2200

-

pF

Over Voltage Trim Range

90

-

110

%

Remote Sense Compensation

-

-

10

%

The total voltage increased by trim and

remote sense should not exceed

10%Vo.

Over Temperature Protection

-

125

-

°C

Over Voltage Protection

1.39

-

1.6

V

Weight

-

28

-

g

FIT

TBD

-

Calculated Per Bell Core SR-332

°C,

FIT=10

Dimensions

Inches (L × W × H)

Millimeters (L × W × H)

2.30 x 0.90 x 0.40

58.42 x 22.78 x 10.26

-