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BQ24297: Recognize as unknown device

KIM Andy
Expert 2530 points
Part Number: BQ24297

hi

Our products are charged with USB port or cradle, and the adapter used for charging is only two lines: vcc and gnd (no USB line).
We always want to use fast charge mode.
However, it may be recognized as an unknown state.

We modified DPDM_EN (REG07 [7]) based on the link below.

"The DPDM_EN (REG07 [7]) bit can be set to force input current detection."


In some cases, the test check results in an unknown state, or in some cases it may not.
If you can't get out, you're entering a compulsory lighting command until the charge is complete.
Over time, there are a lot more cases where you can't get out of the test.
Is there a way to improve it?