BQ25175中文资料采用 WCSP 封装的独立单节 800mA 线性电池充电器数据手册TI规格书

描述 Description

The BQ25175 is an integrated 800-mA linear charger for 1-cell Li-Ion and Li-Poly batteries. The device has a single power output that charges the battery. The system load can be placed in parallel with the battery, as long as the average system load does not prevent the battery from charging fully within the safety timer duration. When the system load is placed in parallel with the battery, the charge current is shared between the system and the battery.

The device has three phases for charging a Li-Ion/Li-Poly battery: precharge to recover a fully discharged battery, fast-charge constant current to supply the bulk of the charge, and voltage regulation to reach full capacity.

In all charge phases, an internal control loop monitors the IC junction temperature and reduces the charge current if an internal temperature threshold, TREG, is exceeded.

The charger power stage and charge current sense functions are fully integrated. The charger function has high accuracy current and voltage regulation loops, charge status display, and automatic charge termination. The fast charge current is programmable through an external resistor. The precharge and termination current thresholds track the fast charge current setting.

特性 Features

• Input voltage up to 30-V tolerant
• 350-nA battery leakage current
• Supports 1-cell Li-Ion, and Li-Poly
• External resistor programmable operation
• High accuracy
• ±10% charge current accuracy
• Charging features
• Termination current 10% of ISET
• Cold and hot temperature charging disabled
• TS pin for charging function control
• Integrated fault protection
• 1000-mA overcurrent protection
• OUT short-circuit protection
• ISET pin short/open protection