Other Parts Discussed in Thread: BQ25672
From hardware point of view, is this this chip a Buck-Boost converter? If VIN1 or VIN2 is input for VBUS, its voltage will higher than output voltage. That means the chip is a Buck converter. For example, I plan to design 3 cells charger. 3 cells battery will be charged by the Buck converter. My question is when VBUS is USB OTG charger mode, how does it charge the battery? Please explain the charge process of the battery at output current 5A for Buck converter. The datasheet shows charge current is 3A(max), how does the Buck converter charge the battery while providing a load current at the same time? If VBUS is 5V, then output voltage is 12V. That means the Chip is a Boost converter and charges for 3 cells battery. How does it work? Moreover, at OTG mode, how does USB charges 3 cells battery? If all the power sources are not available, how doesn't the battery supply the load?