BQ24721C

The BQ24721C is a high efficiency synchronous battery pack charger with high level of integration for portable applications.The BQ24721C implements a high performance analog front-end that interfaces to the system power management micro-controller through a simplified SBS-like SMBus interface.The dynamic power management (DPM)function modifies the charge current sense amplifiers of BQ24721C enable accurate measurement of either the charge current or the ac adapter current,allowing termination of nonsmart packs and monolitoring of overall system power.

BQ24721C has many unique features: The first one is high efficiency NMOS-NMOS synchronous buck converters with user-selectable 300 kHz or 500 kHz frequency.The second one is BQ24271C offers softer turn-on,stronger turn-off.The third one is 0.4% charge voltage regulation accuracy.The forth one is 3% charge current regulation accuracy.The fifth one is 2% accuracy integrated charge and AC adapter 20x current amplifier output,etc.

There are some absolute maximum ratings about BQ24721C.Maximum differential voltage(AGND-PGND) is -0.3 V to 0.3 V.Maximum differential voltage(ACP-ACN,SRP-SRN,SYNP-SYNN) is 0.6 V.Operating ambient temperature range(Ta) is -40 to 85.Maximum junction temperature is 150.Storage temperature range is -65 to 150.