Ac Switch Performance Improvements; Table 11. Tips For Ac Switch Performance Improvement - STMicroelectronics STEVAL-GLA001V1 User Manual

12

AC switch performance improvements

You can improve AC switch performance in several ways, such as adding a snubber, a R
following table summarizes the configurations.
AC switch
X101
X102
X103
The following tips can help improve the behavior for each AC switch reference.
1. X101 Triac
X101 is a snuberless Triac; it doesn't need a snubber to improve commutation performance. You should add
a varistor to protect the Triac against overvoltage: varistor reference depends on the applied voltage level.
You can also add a R
A (or 4 kV criteria B) levels are required.
2. X102 AC switch
X102 is an overvoltage protected AC switch; it does not need a varistor to protect it against overvoltage. You
can add a snubber to improve commutation performance. You can also modify the R
a snubber to improve dV/dt robustness and therefore IEC61000-4-4 if higher levels are required.
3. X103 AC switch
X103 is an overvoltage protected AC switch; it does not need a varistor to protect it against overvoltage. You
can add a snubber to improve commutation performance. You can also modify the R
a snubber to improve dV/dt robustness and therefore IEC61000-4-4 if higher levels are required.
UM2304 - Rev 3
Table 11. Tips for AC switch performance improvement
IEC61000-4-5 or
overvoltage
Add a MOV (strongly
recommended)
No need
No need
to improve dV/dt robustness and therefore IEC61000-4-4, if higher than 2 kV criteria
GK
AC switch performance improvements
IEC61000-4-4 or dV/dt
Add a R
GK
Modify R or add a snubber
GK
Modify R or add a snubber
GK
UM2304
or a varistor. The
GK
Commutation
No need
Add a snubber
Add a snubber
value (R110) or add
GK
value (R111) or add
GK
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