AC line switch basic application

ACS302

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DocID024500 Rev 1

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AC line switch basic application

The ACS302 device is well adapted to washing machines, dishwashers, tumble driers,

refrigerators, water heaters, and cooking products. It has been designed especially to switch

ON and OFF low power loads such as solenoids, valves, relays, micro-motors, pumps, fans,

door locks and low power lamps.



Pin COM: Common drive reference, to connect to the power line neutral



Pin G: Switch gate input to connect to the digital controller through a resistor



Pin OUT: Switch output, to connect to the load

driven directly by the digital controller through a resistor as shown on the typical application

diagram. No protection devices are required between the gates and common terminals.

In appliance systems, this ACS drives slow power loads in full cycle ON / OFF mode.

Thanks to its thermal and turn off commutation performances, the ACS302 switch is able to

drive three loads up to 0.2 A each such as two water valves and a door lock in a dishwasher,

without any additional turn-off snubber.

Figure 16. Typical application

PA0

PA1

PA2

Vcc

Vss

ST72 MCU

M

N

L

VALVE / DISPENSER

DOOR LOCK

PUMP / FAN

MAINS

OUT1

OUT2

OUT3

ACS302

COM

G1

G2

G3

S1

S2

S3