ACST4 查看數據表（PDF） - STMicroelectronics

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ACST4

AC power switch

STMicroelectronics 

AC line switch basic application

2

AC line switch basic application

ACST4

The ACST4 device has been designed to switch on and off low power, but highly inductive or

resistive loads such as dishwashers spray pumps, and air-conditioners fan.

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

■ Pin G: Switch Gate input to connect to the digital controller

■ Pin OUT: Switch Output to connect to the load

ACST4-7S triggering current has to be sunk from the gate pin G. The switch can then be

driven directly by logic level circuits through a resistor as shown on the typical application

diagram .

Thanks to its thermal and turn off commutation performances, the ACST4 switch is able to

drive with no turn off additional snubber an inductive load up to 4 A.

Figure 2. Typical application diagram

L

AC

MAINS

N

LOAD

L

M

R

OUT

ACST4

OUT

COM

G

- Vcc

ST72 MCU

4/13

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