STCC08 Datasheet, PDF (8/13 Pages) STMicroelectronics – AC switch failure mode detector

Application information
3
Application information
STCC08
Figure 5. Application example with an MCU direct drive + ACS
NEUTRAL
G
ACS
GATE DRIVER
+
-
3.3V to 5V
V_CC
IN
R_IG
LOAD
LINE
V_CC
AC
POWER SWITCH
SIGNAL SHAPING
AVF DRIVER
AVF
GND
V_CC
MCU
3.1
The placement of a 100 nF capacitor between V_CC and GND close to the STCC08 is
advised. SW is an electromechanical switch that is part of the application design, for
example, the water sensor in a washing machine.
Recommendations
The STCC08 is designed for 5 and 10 mA ACSs, ACSTs and TRIACs.
STCC08 basic application
The microcontroller reads the AC switch state from the AVF output of the STCC08. The
microcontroller can power-off the application driving a front-end relay.
Figure 6. Non-insulated application
NEUTRAL
ACS
3.3V to 5V
GATE DRIVER
V_CC
G
IN
+
-
R_IG
LOAD
LINE
FRONT END RELAY
V_CC
AC
POWER SWITCH
SIGNAL SHAPING
AVF DRIVER
AVF
GND
SAFETY TURN OFF
V_CC
MCU
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