BQ24715: BQ24715 VBAT has large ripple

Star Xu

Part Number: BQ24715

The customer design with BQ24715. When only the adapter is plugged in and the power button is not pressed, the output VBAT voltage ripple is very large.

The circuit is shown in the figure. Please help to check it.

Waiting for your reply.

Thanks

Star

over 1 year ago

0 Aya Khedr over 1 year ago

TI__Mastermind 24012 points

Hi Star,

Thank you for reaching out!

I will review the schematic and get back to you by Wednesday with feedback.

Best Regards,

Aya

0 Star Xu over 1 year ago in reply to Aya Khedr

TI__Genius 9645 points

Hi Aya

Any update?

Waiting for your reply.

Thanks

Star

0 Aya Khedr over 1 year ago in reply to Star Xu

TI__Mastermind 24012 points

Hi Star,

Thank you for your patience.

1- How are you testing this exactly? Could you provide some clarification on "adapter is plugged in and power button is not pressed"?

2- Does this behavior occur when the battery or system load is attached?

3- Did you test this on an EVM as well?

Best Regards,

Aya

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BQ24715: BQ24715 VBAT has large ripple