Other Parts Discussed in Thread: BQ25060
I understand the BQ25616 states the acceptable reange for ICHG is 300mA to 3A. I also know TI's postion that smaller charge currents should be handled by linear chargers, such as the BQ25060.
I have experience with the BQ25060 and it does not meet the power path requirements due to the way it regulates the ICHG current by regulating the overall VBUS current, which in turn dictates the system current.
The BQ25616 checks most of the boxes I need for a smaller battery system that still requires true power path, OTG, low quiescent (not as low as BQ25060, though) and high battery discharge rate.
I know the BQ25616 will operate with ICHG less than 300mA, so I wanted to understand the risks of going below 300mA. Is this an ITERM limit being much higher than typical 5%-10% of ICHG? It seems this might be limited to 30mA, so therefore, 300mA to 600mA would be indicated for ICHG. Is there a switcher stability issue with lower than 300mA ICHG? What other reasons would indicate not using ICHG say at 250mA or 275mA?
Matt
