BQ24735RGRT

The BQ24735RGRT is a high-efficiency Synchronous Battery Charger Controller offering low component count for space-constrained, multichemistry battery charging applications. It 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 the adapter will not crash. It uses two charge pumps to separately drive N-channel MOSFETs (ACFET, RBFET and BATFET) for automatic system power source selection. SMBus controlled input current, charge current and charge voltage digital-to-analog converters (DACs) allow for very high-regulation accuracies that can be easily programmed by the system power management microcontroller. It uses an internal input current register or an external ILIM pin to throttle down PWM modulation to reduce the charge current. It charges 1-, 2-, 3-, or 4-series Li+ cells.

• Programmable battery depletion threshold and battery LEARN function
• Programmable adapter detection and indicator
• Integrated soft start
• Integrated loop compensation
• Real-time system control on ILIM pin to limit charge current
• Green product and no Sb/Br