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

3

ISOLATED DC/DC CONVERTERS

48 Vdc Input 12 Vdc/12 A, 3.3 Vdc/46 A, 5 Vdc/30 A, 1.2-2.5 Vdc/50 A Outputs

May 17, 2011

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

Output Specifications

Parameter

Min

Typ

Max

Unit

Notes

Output Voltage Set Point

11.790

4.925

3.260

2.450

1.770

1.477

1.176

12.030

5.004

3.308

2.503

1.808

1.500

1.200

12.270

5.075

3.360

2.550

1.844

1.523

1.224

V

V

V

V

V

V

V

Vin=48V, Io=50% load

Output Voltage Set Point

-3.5

-

3.5

%Vo,set

Over all operating input voltage,

resistive load, and temperature

conditions.

Line Regulation

-

-

-

8

5

3

15

15

6

mV

mV

mV

Load Regulation

-

-

-

10

5

2

20

10

5

mV

mV

mV

Regulation Over Temperature

(-40

C to +85 C)

-

-

-

-

-

60

40

30

20

15

100

65

50

40

30

mV

mV

mV

mV

mV

Output Current

Vo=12 V

Vo=5.0 V

Vo=3.3 V

Vo=1.2 V-2.5 V

0

0

0

0

-

-

-

-

12

30

46

50

A

A

A

A

Current Limit Threshold

14

35

50

55

15.5

40

60

60

18

45

65

65

A

A

A

A

Short Circuit Surge Transient

-

3

5

A

Ripple and Noise (rms)

-

-

-

-

25

20

20

15

30

25

20

20

mV

mV

mV

mV

Ripple and Noise (pk-pk)

Vo=2.5 V

-

-

-

-

-

-

70

60

50

45

40

55

40

90

80

70

60

60

70

60

mV

mV

mV

mV

mV

mV

mV

Test conditions:

0-20 MHz BW, with a 1 uF

ceramic capacitor and a 10 uF

Tantalum capacitor at the output.

Turn on Time

10

-

100

mS

Overshoot at Turn on

-

0

5

%