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AN2859 Datasheet(PDF) 10 Page - STMicroelectronics

Part # AN2859
Description  Multiplexed diagnostics of AC switches using two STCC08
PDF  29 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN2859 Datasheet(HTML) 10 Page - STMicroelectronics

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Multiplexed diagnostics
AN2859
10/29
DocID15255 Rev 2
Figure 13. VSTATE signal variation due to the IACT parameter dispersion
Note:
It is recommended that the AVF signal be read during several AC line cycles around the AC
line peak voltage.
The STCC08 AVF signal must be read after the AC line peak voltage (
ΔtAVF_READ) and
before the t3 (see AN2716).
VLine
I=
AC1
IAC2
AVF1 (STCC08_1)
I
ACT2
-I
ACT2
t (s)
t (s)
ϕ
t
1
t = 0
0
2 x f
1
AVF2 (STCC08_2)
t (s)
VSTATE
t (s)
I
ACT1
-I
ACT1
t
2
t
3
t
4
t =
5
VCC
VCC
V1
V3
ΔtDetection
ΔtAVF_READ



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