AVS12

AUTOMATIC VOLTAGE SWITCH (SMPS < 500W)

CONTROLLER

s

50/60Hz FULL COMPATIBILITY

s

INTEGRATED VOLTAGE REGULATOR

s

TRIGGERING PULSE TRAIN OF THE TRIAC

s

PARASITIC FILTER

s

LOW POWER CONSUMPTION

TRIAC

s

HIGH EFFICIENCY AND SAFETY SWITCHING

s

UNINSULATED PACKAGE : AVS12CB

s

s

March 1995

B

TO 220AB

(Plastic)

P

DIP8

(Plast ic)

1

2

3

4

V

Mode

V

8

7

6

5

V

V

Osc / In

Osc / Out

N.C.

A1

A2

G

DESCRIPTION

The AVS12 kit is an automatic mains selector

(110/220V AC) to be used in SMPS < 500 W. It

is composed of 2 devices :

• The Controller is optimized for low consump-

tion and high security triggering of the triac.

vates an additional option. If the main power

drops from 220V to 110V, the triac control re-

mains locked to the 220V mode and avoids

any high voltage spike when the voltage

comes back to 220V.

sactivates this option.

• The TRIAC is specially designed for this appli-

cation. An optimization between sensitivity and

dynamic parameters of the triac gate highly

reduces the losses of supply resistor and al-

lows excellent immunity against disturbances.

PIN CONNECTION

1/8