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AN390 Datasheet(PDF) 12 Page - STMicroelectronics

Part # AN390
Description  AVS kit guidelines
PDF  17 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN390 Datasheet(HTML) 12 Page - STMicroelectronics

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Thermal rating of Triac
AN390
12/17
DocID3572 Rev 4
Figure 8. AVS thermal management
For example, with an AVS10CB Triac, if tp = 2 ms and ITRMS = 5 A then the Triac dissipated
power PT = 3.8 W. If the maximum junction temperature is Tj = 110 °C and the maximum
case temperature Tc = 100 °C with a heatsink thermal resistance RTHC-a = 7.5 °C/W then
the maximum operating ambient temperature (Ta) could be 70 °C.
110
100
90
80
(
(
°C)
W)
T
P
CASE
T
01
234
5678
0
2
4
6
8
10
12
IT (RMS) (A)
TAMB (°C)
10
30
50
70
90
110
130
t
t
8.3ms
t = 1ms
t = 2ms
t = 3ms
t = 8ms
Rth = 0.0 °C/W
2.5 °C/W
5.0 °C/W
7.5 °C/W
(W)
PT
0
2
4
6
8
10
12



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