I’m having a difficult time diagnosing a test unit that doesn’t charge the battery. Measuring with a current probe at battery terminal, no current going into the battery. I received this unit from my Verification team. They relayed to me that the pump did charge the battery at one point, but does not anymore. He said it had about 50 charge/discharge cycles on the battery (not completely discharged, only to about 60% discharge).
I did try different batteries, same phenomenon.
The STAT pin is blinking, which means a couple states
Charge suspend: it looks like this is only tied to the temperature qualification of the battery. Battery is within temperature ranges (per below)
Input overvoltage: Input is 12V. Well within the adapter voltage (per below)
Battery overvoltage: Battery is 6.8V. Not an overvoltage condition. CELL = FLOAT. Measured at 1.091V
Timer fault: Do not believe so. Happens immediately.
(two commas, something deleted?): what was deleted from datasheet?
Battery absent: battery is definitely connected.
Per section 9.3.9 of the datasheet, I reviewed the status of all of the pins.
Any ideas? This is weird. I don’t want to remove or reflow any components until I can absolutely determine there was an issue with the part.
Thanks,
Daniel