BQ79616-Q1: Signal condition on CAN bus

Hi Expert,

BQ7916-Q1 is using on customer side. Customer follow the EVM design. Now they meet a issue about CAN bus. Could you help us on that?

Here is the schematic:

The test point is on the right, Here is the waveform between COMHP and COMHN:

When we remove the transformer, here is the test result:

Here is the test waveform with transformer:

Here is the datasheet for transformer:

CEP99变压器.pdf

Best Regards

Songzhen Guo