I have a LiIon Battery Charger IC which will draw around 50µA when not needed, see circuit 1. This is a lot of current for no work in my opinion. Now I search for a solution how I can disconnect the charger if not needed. There is one open drain status pin from the charger I can use for it (active low).
What I came up with is in circuit 2. If the Charger is loading the battery the #CHG pin is pulled down and opens the PMOS (controlled by the charger control inside the charger). If the charger is not charging the charger control is giving out a undefined voltage as I understood.
So my Question is: Can this solution do the job of disconnection the charger if not needed and connect it if needed?