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STCC08 Scheda tecnica(PDF) 9 Page - STMicroelectronics

Il numero della parte STCC08
Spiegazioni elettronici  AC switch failure mode detector
PDF  13 Pages
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Produttore elettronici  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STCC08 Scheda tecnica(HTML) 9 Page - STMicroelectronics

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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 RAC resistors
during an AC line over-voltage. This provides a robust solution and allows setting high
voltage resistors RAC 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 RSHUNT is removed, the MCU cannot discriminate between an ACS short circuit and
open load failure. See Table 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
ACS



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