TI bq25703A I2C多种化学电池升压－降压充电控制方案
TI公司的bq25703A是带有系统电源监视器和处理器热监视器的I2C多种化学电池升压-降压充电控制器,具有低元件数量和高效率的优势,可从各种输入源对1-4颗电池充电,输入电压3.5V-24V,支持USB2.0, USB 3.0, USB 3.1 (Type C)和USB_PD输入电流设定,降压和升压工作无缝转换.输出电流高达6.35A,可编程开关频率800kHz或1.2MHz,充电电压±0.5%,输入/充电电流±2%,输入/充电电流监视±2%,电源监视±5%.主要用在无人机,蓝牙扬声器, IP照相机,可拆电源,平板电脑和电源组,工业和医疗设备和带可充电电池的手持设备.本文介绍了bq25703A主要特性,功能框图,典型应用电路图以及评估模块bq2570x EVM (bq25700AEVM-732和bq25703AEVM-732)主要特性,电路图,材料清单和PCB装配图.
The bq25703A is a synchronous NVDC battery buck-boost charge controller, offering low component count, high efficiency solution for space-constraint, multi-chemistry battery charging applications.
The NVDC-1 configuration allows the system to be regulated at battery voltage, but not drop below system minimum voltage. The system keeps operating even when the battery is completely discharged or removed. When load power exceeds input source rating, the battery goes into supplement mode and prevents the input source from being overloaded.
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