Currently I have a 18650 battery charge and discharge circuit in my Board design as a "Emergency fall-over power. And I have some problems with it.
First problem I see is that while the battery is charging my 5v rail will raise with the battery, instead of keeping it at a constant 5v. Next it seems that if i touch the PCB near the R4 resistor, the charging led will flicker.
Is there a better alternative to the dw01a combo with the tp4056?
Id basically like a constant 5v source reguardless if their is power coming into the board, and a way to tell if the battery is charged/ if the power is plugged in.
Currently the circuit this powers draws somewhere in the neighborhood of 750ma at peak.
And may have an input voltage though a regulator of 4.9 <-> 8.2v