FAN5451x 系列电池充电控制器包括一个 I2C 控制的 3.2 A 符合 USB 标准的开关模式充电器。为了实现快速系统启动，该集成电路包括了一个优化的功率路径电路，还能在充电期间准确测量电池电流，在放电期间提供低阻抗。充电参数和运行模式可通过 I2C 接口进行编程。充电状态通过 I2C 端口和 /STAT 引脚报告回主机。FAN5451x 以三种模式提供电池充电： 预充电 (IPP)、恒定电流 (CC) 和恒定电压 (CV)。该充电器可以自动在电池降至重启电压阈值时自动重启充电循环。如果去除了输入源，该集成电路则进入高阻抗模式，防止电池电流泄漏到任一输入。
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