nPM1100-QDAA charger nor working

RE: nPM1100-QDAA charger nor working

Simonr — Fri, 04 Aug 2023 09:21:03 GMT

Glad to hear that. Closing this case then 🙂

RE: nPM1100-QDAA charger nor working

Skorostetskyi — Thu, 03 Aug 2023 14:55:08 GMT

I've made a new pcb and everything works as expected. Thank you!

RE: nPM1100-QDAA charger nor working

Skorostetskyi — Tue, 27 Jun 2023 14:06:39 GMT

Awesome! Thank you so much!

P.S. I tried to solder pin 4 to GND but no success in charging. I think it might be a bad soldering. I will create a new pcb and test it.

RE: nPM1100-QDAA charger nor working

Simonr — Tue, 27 Jun 2023 12:48:38 GMT

You're referring to the pin assignments when talking about where pins 4 and 18 are set to N.C., correct? I've contacted one of the nPM designers to get a confirmation, and it seems like pin 4 should indeed be grounded to ensure correct operation. The PS will be updated to reflect this in the pin assignments as well.

From the schematics you have shared I also have some other notes when comparing it to our reference circuitry:

A decoupling cap (1.0µF) from VBAT to GND is missing
VTERMSET shouldn't need a resistor at all, it should either be grounded or go to VSYS.
C2 in your design should be 22µF for configuration 1 or 10µF for configuration 3.
VOUTBSET1 (pin 2) should be shorted to ground in configuration 3, shorted to VOUTBSET2 in config 1.

Best regards,

Simon