BQ24610: SLUAA41 PIN FMA Table 3-3 Open Circuit "ACN" Pin

Craig Schaler

Part Number: BQ24610

Hi,

In SLUAA41 Table 3-3, TI claims that if the ACN pin is left open, No Charging can occur, and I concur with this assessment. However in reviewing the Block Diagram the ACN pin is used to power the ACN-6V LDO that is used to control the BATDRV pin. Can TI please confirm that if the ACN pin is open the ACN-6V LDO is unpowered? Can TI advise on the state of the BATDRV pin and how this can affect the BATDRV Mosfet Vgs? Are there any other functions that are faulted with an ACN pin open? Please consider that AC Adapter is present and not present as well.

Will SLUAA41 be corrected if found necessary?

Thank You!

over 2 years ago

0 Tommy Lin over 2 years ago

TI__Mastermind 31920 points

Hi Craig,

I will get back to you by the end of this week.

Regards.

0 Tommy Lin over 2 years ago

TI__Mastermind 31920 points

Hi Craig,

After testing on the EVM, there are no impact on the state of BATDRV whether the ACN pin is floating or not. The BATFET (PMOS) will be turned on when there is no input source (negative Vgs) and turned off when there is an input source (positive Vgs).

The failure with ACN floating will be no charging.

Regards.

0 Craig Schaler over 2 years ago in reply to Tommy Lin

Prodigy 10 points

Hey Tommy,

Thank you for the clarification. Can TI please provide a corrected block diagram indicating how the BATDRV pin is controlled within the BQ24610? With your resolution above and the datasheet documentation, it is unclear how the BATDRV pin is controlled.

Regards,

Craig

0 Tommy Lin over 2 years ago in reply to Craig Schaler

TI__Mastermind 31920 points

Hi Craig,

I will relay this information to the team. However, I do not have timeline on when the document will be updated.

Regards.

Power management

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BQ24610: SLUAA41 PIN FMA Table 3-3 Open Circuit "ACN" Pin