上述帖子中的以下内容该如何理解：
问题1：PDSG场效应管关断后（通过PACK_ADC可检测预放电完成状态），PACK_EN场效应管即转为关断，非常明确PACK_EN场效应管后关断；但是前半部分：在PDSG场效应管导通时，PACK_EN场效应管将首先保持导通状态，这句该如何理解，到底谁先导通？
问题2：上述既然非常明确PDSG场效应管先关断，PACK_EN场效应管后关断，我的疑问是：PDSG场效应管关断后，也就是预充完成，就切换到主MOS导通，那如果PACK_EN场效应管还没有关断会有什么问题？因为下文中第一条要求：当两个 CHG/DSG FET 都关断且未连接负载/充电器时，FET (PACK_EN)将导通。
问题3：原理图中的Q19 FET和Q33三极管部分电路的作用是什么，什么工作原理？
Here are the cases for the PACK_EN pin.
- When both CHG/DSG FETs are OFF and if there is no load/charger attached the FET (PACK_EN) will be ON.
- If a charger is attached, the FET (PACK_EN) will turn OFF to disable the circuits.
- If a load is attached, the FET (PACK_EN) will initially be ON as the PDSG is turned on, then it will turn OFF after the PDSG FET turns-off (End of pre-discharge is known through PACK_ADC).
- If a reverse charger is attached, the FET (PACK_EN) will be ON.
The MCU would keep PACK_EN low (OFF) in all other conditions.
