I have a problem with my mcp73831 lipo charger; i have a connection with two neodym magnet connected to usb in one side and my circuit with the MCP73.. in the other side.
There is no problem when i respect the connexion polarity (5v from usb -> to 5v mcp73831 and Gnd from usb -> to Gnd mcp73831).
But, when i change the polarity, the mcp73831 burned… and i was wondering why this IC is not protected from wrong polarity connection ..
So, i want to add a diode with low drop voltage connected to 5v from mcp73831, in forward-biased mode.
I add two circuits to better understand the problem.
And with diode :
Am I allowed to put a diode between the MCP73, would the voltage drop of the diode be too much?