BQ24610: how about the Battery output resistance of the bq24610?

None_feiyu

Expert 1320 points

Part Number: BQ24610

Dear ti,

I have read the slua585 design resources，there is a description of a paragraph in the below

I see the bq24610 spec the Vrch typical:50mv，I setting the Iterm=0.3A， so the Rbat_max=50mv/0.3A=166.7mΩ，

Is there right?

thanks&regards

None

over 7 years ago

0 Paul Yeh over 7 years ago

TI__Mastermind 18005 points

None,

Good day.

Yes, your calculation is correct. So you should make sure your resistance between charger output and battery terminal should be lower than 166.7mohm.

Otherwise you will see BQ24610 will charge and terminate repeatedly during battery absent situation.

Thanks

0 None_feiyu over 7 years ago in reply to Paul Yeh

Expert 1320 points

Hi Paul Yeh

if my battery output resistance Ro≤300mΩ，that it means to i should change my Iterm so the Iterm max≤50mv/300mΩ=0.167A，at the bq24610 spec demand to Iterm≥0.125A，so in my design,the Iterm should set to the range [0.125A，0.167A].

is there right?

Thanks&regards.

0 Paul Yeh over 7 years ago in reply to None_feiyu

TI__Mastermind 18005 points

Yes, it it.

Thanks

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BQ24610: how about the Battery output resistance of the bq24610?