AN2716

STCC08 description

Doc ID 14460 Rev 2

5/28

1.2

STCC08 non-insulated and insulated application diagram

The STCC08 is dedicated to applications with MCU. Figure 2 and Figure 3 show

respectively the STCC08 non-insolated and insolated application diagrams. The STCC08 is

compatible with 3.3 V and 5 V power supplies. The DC power supply must be a negative

ACST and TRIAC devices (AC switches can be triggered only by a current taken from the

gate).

Figure 2.

Un-insulated application diagram

Figure 3.

Insulated application diagram

AVF

VCC

GND

RIG

AC

IN

G

Power switch

signal shaping

AVF driver

Gate driver

+

-

MCU

VCC = 3.3V to 5V

VCC

VCC

AVF

GND

Load

Neutral

ACS

STCC08

RAC

Line

Front end relay

VCC

R1

AC

IN

G

Power switch

signal shaping

AVF driver

Gate driver

+

-

MCU

VCC2

VCC2

AVF

GND

Load

Neutral

ACS

STCC08

STCC08

Insulated

Power supply

Un- insulatated

5 V or 3.3 V

Power supply

OPTO1

OPTO2

VCC1

VCC1

RAC

RIG

Line

Front end relay

RIG

RAVF

R2