BQ25713: 1 cell buck charger with boost operation

K. Sasaki14

Guru 10200 points

Part Number: BQ25713
Other Parts Discussed in Thread: BQ24800

We are looking for Li-ion 1 cell buck charger with boost operation.

Vin: USB 5V
VCHG: programable, typ 4.2V
ICHG: up to about 5A

Boost operation: 12Vout, 2.3A from battery power

I think bq25713 can meet these requirement, is this right? Please let me know if you have any other devices.

If bq25713 is best device, can we use bq25713 with 2 switch circuit?
In this use case, bq27513 is used only as buck charger and boost converter. So I think Q3 and Q4 is not needed.

Best Regards,
Kohei Sasaki

over 5 years ago

0 Tiger Zhou over 5 years ago

TI__Mastermind 33385 points

Hi, Kohei,

That is right. BQ25713 is our latest device in the switch-mode buck-boost charger family, however, BQ25713 does not support 2-switch buck-only circuit.

Regards,

Tiger

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

0 K. Sasaki14 over 5 years ago in reply to Tiger Zhou

Guru 10200 points

Tiger-san,

OK, I understand. Doesn't bq25713 support 2-switch buck circuit because it has not been verified?

Do you have no other optimal device?

Best Regards,
Kohei Sasaki

0 Tiger Zhou over 5 years ago in reply to K. Sasaki14

TI__Mastermind 33385 points

Please take a look at our newly released BQ24800 for your application.

0 K. Sasaki14 over 5 years ago in reply to Tiger Zhou

Guru 10200 points

Tiger-san,

Thank you for your reply. I could checked bq24800 datasheet.
Is there any other internal FET version device of bq24800?

And furthermore, 5V output is required in battery only boost mode. I think bq24800 cannot out 5V in battery only boost mode.

Best Regards,
Kohei Sasaki

0 Tiger Zhou over 5 years ago in reply to K. Sasaki14

TI__Mastermind 33385 points

I don't have other suggestions.

Power management

Power management forum

BQ25713: 1 cell buck charger with boost operation