BQ76200: Series capacitors from input to output

Part Number: BQ76200

Tool/software:

Apologies for a maybe simple question.

What is the purpose of C1 and C2 (and also C3 and C4 while I'm asking) in the EVM schematic. These also appear in a bunch of other reference designs.

How are the values derived? Can anyone point me to some reading material?

Thanks very much

over 1 year ago

0 Luis H. S. over 1 year ago

TI__Mastermind 42060 points

Hello Laurance,

These are known as ESD capacitors, they are meant to to redirect ESD transients away from sensitive components so that it can directly reach the battery (Batteries are robust against ESD).

The following old application note talks about the topic, which should be useful to help understand the topic:

Avoiding ESD and EMI Problems in bq20zxx Battery Pack Electronics

Best Regards,

Luis Hernandez Salomon

0 LM over 1 year ago in reply to Luis H. S.

Prodigy 40 points

Hey Luis,

This is very helpful - Thanks very much.

Power management

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BQ76200: Series capacitors from input to output