Description
The is a high-efficiency, synchronous battery charger, offering low component count for space-constraint, multi-chemistry battery charging applications. The bq24735 supports Turbo Boost by allowing battery discharge energy to the system when system power demand is temporarily higher than the adapter maximum power level so that adapter will not crash. The bq24735 utilizes two charge pumps to separately drive n-channel MOSFETs (ACFET, RBFET, and BATFE) for automatic system power source selection. SMBus controlled input current, charge current, and charge voltage DACs allow for very high regulation accuracies that can be easily programmed by the system power management micro-controller. The bq24735 uses an internal input current register or external ILIM pin to throttle down PWM modulation to reduce the charge current. The bq24735 charges one, two, three or four series Li+ cells, and is available 3.5×3.5 mm2 QFN package.
