Application information

ACST12

6/13

Doc ID 15238 Rev 4

2

Application information

2.1

Typical application description

The ACST12 device has been designed to control medium power load, such as AC motors

in home appliances. Thanks to its thermal and turn off commutation performances, the

ACST12 switch is able to drive an inductive load up to 12 A with no turn off additional

snubber. It also provides high thermal performances in static and transient modes such as

the compressor inrush current or high torque operating conditions of an AC motor. Thanks

to its low gate triggering current level, the ACST1210-7 can be driven directly by a MCU

through a simple gate resistor as shown in Figure 16.

Figure 16.

Compressor control – typical diagrams

Compressor

Electronic

starter

Electronic

thermostat

ACST

Rg

ACST

Power supply

AC Mains

Gate

Driver

logical circuitry

1

PTC

Compressor with integrated e-starter

Compressor

Start

switch

Run

switch

PTC

Rg

ACST

Power supply

Gate

Driver

ACST

Rg

AC Mains

Compressor with external electronic drive