I’m having problems with some of my devices not coming out of shipping mode.
My devices are woken/charged using a wireless QI charger with a 5V output.
I’m putting the MP2667 into shipping mode by pulling the INT line down for 8 seconds. The device shuts down.
When I put it back on the charger the system wakes up. I pull the INT line down for about 600ms.
This works most of the time, but a portion (30%) of my devices won’t begin charging again.
The System Status Register indicates Power is good, and No PPM and not charging.
Setting the charge register doesn’t work.
When I detect this state, I’ll redo the shipping mode process (pull the int pin for 8 seconds and then again for 600ms and that often but not always cures the situation.
At statup I have noted the INT pin does chatter a little though I don’t see anything unusual in any of the fault registers.
If I pull the device from the charger, I’ll see system briefly loose power and then work normally on battery, charge etc. However if the battery is very low I can’t ever get the system to charge again.