HI:
There is POE circuit based on TPS23754,The design has a problem,the 12V output voltage will restart. Waveform diagram is as follows:
The roboting reson is unknown, I need help。
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HI:
There is POE circuit based on TPS23754,The design has a problem,the 12V output voltage will restart. Waveform diagram is as follows:
The roboting reson is unknown, I need help。
Hi User,
Do you have schematic of your design? Thanks!
Hi User,
I am unable to see the secondary circuitry. I bet the the output is back driving the converter due to large output bulk cap and high output voltage. Can you add a load to the output to see if you can discharge the output cap fast enough to not cause the synch FET to turn ON during shutdown?