BQ24780S: What should BQ24780S work when ACFET short?

Shaquille Chen

Intellectual 1770 points

Part Number: BQ24780S

Hi Team,

Customer feedback that BQ24780S are not able to charge battery. They found their AFCET was damage.

They saw ACOK and REGN output 6V. It cannot charge battery and turbo boost.

Question:

1. What should BQ24780S work when ACFET short?

2. What's the condition that BQ24780S are able to charge battery?

Thanks

Shaq.

over 6 years ago

0 Angelo Zhang87 over 6 years ago

TI__Genius 11850 points

Hi Shaq,

1) Please take a look at this related thread, which describes the protection features that will be lost if ACFET and RBFET are shorted out:
e2e.ti.com/.../663212

2) Section 7.3.3 of the datasheet provides a list of conditions that must be valid in order to start charging as well as a list of conditions that will stop charging.

Best regards,
Angelo