BQ24600RVAT

The BQ24600RVAT is a stand-alone synchronous switch-mode highly integrated Li-ion/Li-polymer switch-mode battery-charge controller. It offers a constant-frequency synchronous PWM controller with high-accuracy charge current and voltage regulation, charge preconditioning, termination and charge status monitoring. The BQ24600 charges the battery in three phases such as preconditioning, constant current and constant voltage. Charge is terminated when the current reaches a minimum level. An internal charge timer provides a safety backup. The charge controller automatically restarts the charge cycle if the battery voltage falls below an internal threshold and enters a low-quiescent-current sleep mode when the input voltage falls below the battery voltage.

• 1.2MHz NMOS-NMOS Synchronous buck converter
• High-accuracy voltage and current regulation
• ±0.5% Charge-voltage accuracy
• ±3% Charge-current accuracy
• Internal loop compensation
• Internal soft start
• Input overvoltage protection
• Battery thermistor sense hot/cold charge suspend
• Battery detection
• Built-in safety timer
• Charge over-current protection
• Battery short protection
• Battery overvoltage protection
• Thermal shutdown
• <15µA Off-state battery discharge current
• <1.5mA Off-state input quiescent current
• Green product and no Sb/Br

Applications

Gestion d'alimentation, Electronique Grand Public, Périphériques Portables