STCC08 description
UM0583
6/23
2 STCC08
description
2.1
Block diagram description
Figure 4
shows the block diagram of the STCC08. It includes a “gate driver” block to control
the AC switch, a “power switch signal shaping” block used to read the AC switch state and a
buffer able to send the AC switch state to the MCU (AVF DRIVER). This signal should be
analyzed by the MCU, which can power-off the application in hazardous situations (for
example, to open a relay (SW) placed in the front-end of the application - see
Figure 5
).
Table 1
provides the pin definitions of the STCC08.
Figure 4.
STCC08 block diagram description
Figure 5.
Application diagram
Note:
The STCC08 AVF driver block is used to send the AC switch state to the MCU. The AVF
output is an open collector and should be loaded with an external resistor or connected
directly to the MCU, in pull-up input configuration.
AM01
33
9v1
AVF
V
CC
GND
R
IG
AC
IN
G
POWER SWITCH
SIGNAL SHAPING
AVF DRIVER
GATE DRIVER
+
-
AVF
GND
STCC08
STCC08
AC
R
IG
G
AVF
IN
GND
V
CC
NC
SO-8
1
2
3
4
8
5
6
7
AM01
3
40v1
AVF
V
CC
GND
R
IG
AC
IN
G
POWER
S
WITCH
S
IGNAL
S
HAPING
GATE DRIVER
+
-
MCU
V
CC
V
CC
V
CC
AVF
GND
LOAD
NEUTRAL
S
TCC0
8
S
TCC0
8
R
S
h
u
nt
RAC
R
IG
LINE
FRONT END RELAY
AVF
V
CC
GND
R
IG
AC
IN
G
POWER
S
WITCH
S
IGNAL
S
HAPING
GATE DRIVER
+
-
S
TCC0
8
S
S
S
T
T
TC
C
CC
C
C0
0
0
8
8
8
POWER
S
WITCH
S
IGNAL
S
HAPING
AVF DRIVER
GATE DRIVER
+
-
MCU
V
CC
=
3
.
3
V to 5 V
V
CC
V
CC
AVF
GND
LOAD
NEUTRAL
AC
S
S
TCC0
8
S
TCC0
8
R
S
h
u
nt
RAC
R
IG
LINE
FRONT END RELAY
S
W
electronic components distributor