Description
The bq24780S device is a high-efficiency, synchronous battery charger, offering a low component count for space-constrained, multi-chemistry battery charging applications.
The bq24780S device supports hybrid power boost mode (previously called “turbo boost mode”). It allows battery discharge energy to the system when system power demand is temporarily higher than the adapter maximum power level. Therefore, the adapter does not crash.
The bq24780S device uses two charge pumps to separately drive N-channel MOSFETs (ACFET, RBFET, and BATFET) for automatic system power source selection.
Through SMBus, system power management microcontroller programs input current, charge current, discharge current, and charge voltage DACs
with high regulation accuracies. The bq24780S device monitors adapter current (IADP), battery discharge current (IDCHG), and system power (PMON) for the host to throttle back CPU speed or reduce system power when needed.
