Datasheet

STCC08 Application information
9/13
This function is effective whatever the drive and the nature of the load.
Figure 7. ACS benefits
The ACS clamping capability, from 800 V to 1100 V reduces the stress across R
AC
resistors
during an AC line over-voltage. This provides a robust solution and allows setting high
voltage resistors R
AC
to withstand the ACS clamping voltage instead of the AC line
maximum over-voltage.
STCC08 AVF alarms configuration
Figure 8. Open load and Short circuit ACS discrimination
When R
SHUNT
is removed, the MCU cannot discriminate between an ACS short circuit and
open load failure. See Tabl e 9.
AC
G
NEUTRAL
R
AC1
ACS
R
AC2
V
CC
V
MAX
=V
CL
AC
G
NEUTRAL
R
AC1
ACS
R
AC2
V
CC
V
MAX
=V
CL
AVF
V
CC
GND
R
IG
AC
IN
G
POWER SWITCH
SIGNAL SHAPING
AVF DRIVER
GATE DRIVER
+
-
MCU
3.3V to 5V
V
CC
V
CC
AVF
GND
LOAD
LINE
NEUTRAL
R
AC
R
SHUNT
R
IG
SW
ACS