I used to use the Chinese DW01A as a protection circuit for prototyping. The initial prototype worked and I have to switch to a western chip now.
For this I have chosen AP9211 because it is very similar to the DW01A. It even has the P and N Channel MOSFETS inside the IC so that is another advantage.
However something about the typical application circuit of AP9211 bothers me. It shorts the negative terminal of the battery to ground. This was not the case in the DW01A and I don't really understand the reason for this. Wouldn't this defeat the purpose of the protection IC? I would appreciate any explanation, as this leaves me scratching my head.
Here are the typical application circuits and the block diagrams:
Links to datasheets: