About standalone buck boost charger

Hi Yusuke-san,

TI currently does not have a standalone buck-boost charger.  The closest single IC fit is BQ25792 but even it cannot provide 8A.  I can recommend a 2 chip solution with a boost converter followed by BQ24610 if you want. What is the end application for this?

Regards,

Jeff 

Hi Jeff-san,

Thank you for your support.
End application is auxiliary battery for drive recorders.

> I can recommend a 2 chip solution with a boost converter followed by BQ24610 if you want. What is the end application for this?
you please tell me if there is an example of introducing a 2 chip solution for LTC?

Best Regards,
Yusuke

Hi Jeff-san,

Thank you for your advice.
Customers will consider a two-chip configuration as a candidate.

They want the boost converter to be as small as possible.
In the background, they decided to reduce the charging current.
The battery is LiFePO4.

Condition is :
Vin=8V to 16V
Charge voltage =14.4V(3.6×4cell)
Charge current = 4A(max)
LiFePO4 :2.8V(Discharge voltage),3.2V(Working voltage) ,3.6V(Maximum charge voltage)

We plan to propose a set of TPS61288 and BQ24610.
Vin=8～16V→TPS61288→17V→BQ24610→14.4V

・I think the BQ24610 can support 4-cell LiFePO4 charging.
　Is my understanding correct?　
・Could you give me some advice if you have any concerns about this?

Best Regards,
Yusuke