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BQ79616-Q1: BQ79616-Q1: Abnormal communication problem with BQ79600

Part Number: BQ79616-Q1
Other Parts Discussed in Thread: BQ79616


The customer design with BQ79600PWRQ1 and BQ79616PAPRQ1, They have abnormal communication problems.

BQ79600 communication waveform (when starting up) when the isolation transformer is removed, yellow is COMP-COMHN, purple is COMHP-GND

BQ79600 communication waveform when connecting the isolation transformer, yellow is COMP-COMHN

The schematic as below:

Please help check it.