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what part for 4.2 and 4.3V Li-Ion charger

Other Parts Discussed in Thread: BQ24150A, BQ24038, BQ24172, BQ24160

We are working on a family of products that will

* charger input voltage is 5V (USB OTG type charger)

* potentially use both 4.3 and 4.2V Li-Ion and Li-Poly batteries.  

* We would like to charge at 1.5A. 

* would like power path management so that we can run system with dead battery, and the battery gets all leftover current for charging.

* system output voltage is 4.5V max

* would like to be able to handle lower input voltages as described (


We have looked at several chargers:

TI BQ24150A

* good: charge voltage is adjustable

* bad: does not have power path management, so it is difficult to run the system 50-450mA load, and charge battery with leftover current.


TI BQ24038

* good: power path stuff is nice: The DPPM control tries to reach a steady-state condition where the system gets its needed current and the battery is charged with the remaining current.

* bad: only supports 4.2 and 4.36V, which probably won't work with Sanyo UR16650ZT cells (4.3V)