BQ25970: Do you have/plan for div/4 charger?

Hugo Lee

Intellectual 550 points

Part Number: BQ25970

Dear Sir,

We knew that bq25970 is div/2 type charger (Vout = Vin/2), and want to know if there has div/4 type ( Vout = Vin/4 ) ?

Thanks,
Hugo

over 5 years ago

0 Alen%2520Chen over 5 years ago

TI__Intellectual 2320 points

Hi Hugo,

We don't have div/4 type charge pump charger now? We would develop 4:1 charger in the future. May I know why 2:1 charge pump charger can't meet your requirement ? input current too high?

Thanks for reaching us.

Alen Chen

Please click "This resolved my issue" button if this post answers your question

0 Hugo Lee over 5 years ago in reply to Alen%2520Chen

Intellectual 550 points

Hi Alen,

We notice there is 120W or 100W fast charge application.

For 120W, it will be 20V/6A input to 5V/24A output....

Could it be achieved by using 2pcs bq25970 to regulate 20V/6A Vin to 10V/12A Vout, then 3pcs bq25970 to regulate 10V/12A Vin to 5V/24A Vout?

Thanks,
Hugo

0 Hugo Lee over 5 years ago in reply to Alen%2520Chen

Intellectual 550 points

Hi Alen,

Do you have schedule/roadmap about 4:1 charger?

Thanks,
Hugo

0 Alen%2520Chen over 5 years ago in reply to Hugo Lee

TI__Intellectual 2320 points

Hi Hugo,

BQ25970 can't support 20Vin /10Vout.

We think the efficiency of this two stage topology would be too low, so 2s battery would be a better option for this power level fast charge.

Do you eagerly want to achieve 100~120W charging or just want to know the possibility?

Alen

0 Hugo Lee over 5 years ago in reply to Alen%2520Chen

Intellectual 550 points

Hi Alen,

It's enough to know the possibility at this moment.

Option of 2s or 2p battery could be considered.

Thanks,
Hugo

Power management

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BQ25970: Do you have/plan for div/4 charger?