TI bq25871 7A大电流电池充电解决方案
TI公司的bq25871是集成了10位ADC的14V 7A电池开关充电器,输入电压3-14V,集成了MOSFET和电流检测,集成的高精度ADC用来系统监测,高达1MHz I2C读和写速度,主要用在智能手机,平板电脑和有大电池容量的其它手持设备.本文介绍了bq25871主要特性,功能框图,应用电路以及充电器评估模块BQ25871EVM-813主要特性,电路图,材料清单和PCB设计图.
The device is a 7-A battery switch charger with an integrated 10-bit ADC. The high-current battery switch charger is a 13-mΩ MOSFET with reverse current blocking designed for high efficiency and minimal voltage drop. The high-charge current capability of the device makes it ideal for smartphones, tablets, and other portable devices with large battery capacity.
The integrated 10-bit ADC can measure input voltage and current, battery voltage and current, as well as battery temperature and input connector temperature. This allows the user application to continuously monitor the power input and battery charging parameters to ensure the safety of the battery charging. The flexible OVP and OCP thresholds for VBUS, VOUT, and battery can be modified via I2C registers as the battery goes through constant current (CC) and constant voltage (CV) mode.
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