Hi Bill
Now we are facing this in most of devices almost 80 % of 50 prototypes we made now we have run PPR of 1000 devices and cannot able to finalize this part. Here is problem is we are facing
Battery used capacity: 90 mAh
Iset : 50 mAh
During operation suppose someones didn't charge devices for 7 days out battery discharges completely on battery low voltage cut off circuit activates and when we plug in charger device didn't wakes up. we observe 1.6/1.8 V on Vbat pin.
Please let me know the following
1) How charger IC detects battery presence?
2) I Can't see any low frequency pulsating DC voltage to detect battery on the device? why?
Following are observations in which devices wake up ?
1) If i apply a pulse of 5V on Vbat pin ie +Ve input of battery . why?
2)If i increase the Iset current to 100mA which i can't do due to low capacity of battery.why ?
3) If I put voltage divider circuit on LDO (ie load) CE pin so that it dont gets on till Vbat reaches 3V. why?
