Bel Fuse Inc.

206 Van Vorst Street, Jersey City, NJ 07302

• Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com

ISOLATED DC/DC CONVERTERS

48 Vdc Input, 12 Vdc/8.35 A, 5 Vdc/20 A, 3.3 Vdc/25 A, 1.2-2.5 Vdc/30 A Outputs

Control Specifications

Parameter

Min

Typ

Max

Notes

Remote On/Off

Signal Low (Unit On)

-0.3 V

-

0.8 V

Signal High (Unit Off)

Active Low

2.4 V

-

18 V

0RQB-C0UxxL. The remote

on/off pin open, Unit off.

Signal Low (Unit Off)

-0.3 V

-

0.8 V

Signal High (Unit On)

Active High

2.4 V

-

18 V

0RQB-C0Uxx0. The remote

on/off pin open, Unit on.

Current Sink

0 mA

-

0.75 mA

Output Trim Equations

Equations for calculating the trim resistor are shown below (Unit: kΩ). The Trim Down resistor should be

connected between the Trim pin and Ground pin. The Trim Up resistor should be connected between the Trim

pin and the Vout. Only one of the resistors should be used for any given application.

1) For Vo=1.5 V - 12 V:

2) For Vo=1.2 V:

Notes:

Vo_req=Desired (trimmed) output voltage [V]; Vo=output voltage

22

.

10

225

.

1

626

11

.

5

)

100

(

−

⋅

−

⋅

⋅

+

=

delta

Vo

delta

Rtrimup

22

.

10

511 −

=

delta

Rtrimdown

Module

Vout

Trim

GND

Rtrimdown

Module

Vout

Trim

GND

Rtrimup

22

.

10

6125

.

0

313

11

.

5

)

100

(

−

⋅

−

⋅

⋅

+

=

delta

Vo

delta

Rtrimup

22

.

10

511 −

=

delta

Rtrimdown

()

[]

%

100

_

×

−

=

Vo

Vo

req

Vo

delta