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

9

ISOLATED DC/DC CONVERTERS

36 Vdc - 75 Vdc Input, 12 Vdc/6.5 A Output

Sep. 13, 2011

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

Over Temperature Protection

The OTP is achieved by thermistor R67 and the threshold is set at 110C in non-latch mode; the hottest

component Q3 reaches 112C with 100LFM air flow correspondingly.

It will restart automatically when the

temperature falls down to 105C. The protecting point will be varied a little under different conditions (air flow,

ambient temperature, input voltage, load...).

Input Under-voltage Lockout

V1=31V

V2=34V

Input Voltage (V)

Voltage Falling

Voltage Rising

V1

V2

Under-voltage Lockout