ESP32 failing IEC61000-4-6 (Conducted Immunity).
Posted: Tue Aug 11, 2020 11:12 pm
Hi,
we have just had our ESP32-based PCB fail IEC61000-4-6 (Conducted Immunity).
The PCB is a simple control panel with 4 Capacitive Buttons (using the ESP32s Touch Capability).
When the buttons are operated while the test is in the 280KHz band, the PCB invariably locks up (buttons don't respond).
(I wouldn't have expected problems at this low frequency.)
As the frequency sweep increases,the board often recovers.
I have checked out all the obvious - off-board power supply, on-board DC-DC, grounding, etc. to no avail.
The PCB, needless to say, is designed with all the Espressif design recommendations in mind.
I now believe the problem may be related to the ESP32 WROOM2 module itself or the code running on it.
Has anybody else experienced failures of this particular type while developing commercial ESP32 designs ?
R
we have just had our ESP32-based PCB fail IEC61000-4-6 (Conducted Immunity).
The PCB is a simple control panel with 4 Capacitive Buttons (using the ESP32s Touch Capability).
When the buttons are operated while the test is in the 280KHz band, the PCB invariably locks up (buttons don't respond).
(I wouldn't have expected problems at this low frequency.)
As the frequency sweep increases,the board often recovers.
I have checked out all the obvious - off-board power supply, on-board DC-DC, grounding, etc. to no avail.
The PCB, needless to say, is designed with all the Espressif design recommendations in mind.
I now believe the problem may be related to the ESP32 WROOM2 module itself or the code running on it.
Has anybody else experienced failures of this particular type while developing commercial ESP32 designs ?
R