a.查找ACDRV，引脚定义如下：
Charge pump output to drive both adapter input n-channel MOSFET (ACFET) and reverse blocking n-channel MOSFET(RBFET). ACDRV voltage is 6V above CMSRC when voltage on ACDET pin is between 2.4V to 3.15V, voltage on VCCpin is above UVLO and voltage on VCC pin is 275mV above voltage on SRN pin so that ACFET and RBFET can beturned on to power the system by AC adapter. Place a 4kΩ resistor from ACDRV to the gate of ACFET and RBFET limits the in-rush current on ACDRV pin.
小鸟翻译再加上自己的理解：
ACDRV是两个N沟道隔离保护保护管的驱动，当满足①2.4<ACDET<3.15V时②(SRN+0.275V)<VCC③UVLO<VCC这三个条件满足以后，ACDET引脚电压应该大于6V；这时候用4K欧姆电阻连接到隔离保护管，这就能让ACIN 通过隔离保护管到达公共点。
b.查看ACOK,引脚定义如下：
AC adapter detection open drain output. It is pulled HIGH to external pull-up supply rail by external pull-up resistor when voltage on ACDET pin is between 2.4V and 3.15V, and voltage on VCC is above UVLO and voltage on VCC pin is 275mV above voltage on SRN pin, indicating a valid adapter is present to start charge. If any one of the above conditions can not meet, it is pulled LOW to GND by internal MOSFET. Connect a 10kΩ pull up resistor from ACOK to the pull-up supply rail.
小鸟翻译
AC适配器检测漏极开路输出。它被拉高到外部上拉电源轨由外部上拉电阻时，电压ACDET引脚上是2.4V和3.15V ，并在VCC电压之间的电压高于UVLO电压VCC引脚上的275mV以上的干线网络的电压引脚上，表明一个有效的适配器存在，开始充电。如果上述的任一项条件不能满足，就被拉低到GND通过内部MOSFET 。从ACOK连接一个10kΩ的上拉电阻，以上拉电源轨。
②查看典型电路设计：
