BQ24780S： What is the power consumption of BQ24780S?

Nicholas Shih

Prodigy 120 points

Part Number: BQ24780S

My design is 20V / 5A input.

Charge 4 or 3 strings of 18650 batteries.

The maximum charging current is about 5A.

How do I know what the power consumption of BQ24780S?

I am asking about the power consumption of the IC itself.

over 5 years ago

0 Steve Preissig over 5 years ago

TI__Expert 5330 points

Hi Nicolas,

Please refer to the Quiescent Current specification in the datasheet. This provides IC power consumption under various conditions. Since you mention the charging current, I would assume you are interested in the last parameter on the list, which is IC power consumption while switching, which is a typical power consumption of 10 mA. Note that this assumes 4 nC of gate charge on the switching FETs. If you choose FETs with higher gate charge, the switching power consumption will be higher.

Regards,

Steve

0 Nicholas Shih over 5 years ago in reply to Steve Preissig

Prodigy 120 points

Ok, thanks for your help.

0 Steve Preissig over 5 years ago in reply to Nicholas Shih

TI__Expert 5330 points

My pleasure.

Regards,

Steve

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BQ24780S： What is the power consumption of BQ24780S?