BQ24032A: Audible frequency generation problem.

gianluca peterle

Part Number: BQ24032A

I have developped a board with BQ24032A charger, sometime, when the board is charging a lythium battery from external power supply, it generate an audible pulse frequency.

Which may be the reason?

over 8 years ago

0 Kerry Song over 8 years ago

TI__Intellectual 1980 points

Hello,

Do you mean audible noise?

0 gianluca peterle over 8 years ago in reply to Kerry Song

Intellectual 475 points

Yes, I am not sure if it depends on the battery (Panasonic 1s2pUR18650ZY-12) or the IC (BQ24032A), any idea?

0 Kerry Song over 8 years ago in reply to gianluca peterle

TI__Intellectual 1980 points

Hello,

Is there any cap or inductor in your circuit?

Most time, the noise is because cap or inductor.

0 gianluca peterle over 8 years ago in reply to Kerry Song

Intellectual 475 points

Ok there are a lot of inductors and capacitors on the board, do I have to remove them or there is any other solution?

0 Kerry Song over 8 years ago in reply to gianluca peterle

TI__Intellectual 1980 points

Hello,

It's not the charger's issue. You need think about your system, and try to decrease the circuit ripple or replace cap or inductor.

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BQ24032A: Audible frequency generation problem.