Hi Nordic team, we are using the nPM1100 PMIC together with an nRF52840 and are encountering limitations due to the charging timeout. Issue description Charging stops after approximately 7 hours (TOUTcharge), even though the battery is far from full. System parameters Battery capacity: 4000 mAh Charge current: 100 mA PMIC: nPM1100 MCU: nRF52840 Observed behavior Charging stops after ~7h NPM_ERR indicates timeout condition Battery voltage still well below full charge Questions Is there any way to extend or disable the TOUTcharge timeout? Is it acceptable to periodically restart charging by resetting the PMIC with USB connected? Proposed workaround: Detect timeout via ERR + CHG + VBAT Enter ship mode via SHPHLD Wake up via RTC → restart charging cycle Are there any risks with repeating this process over long charging durations (e.g., 40+ hours)? Is there a recommended approach for low-current charging scenarios with large batteries? Goal Enable reliable charging of a 4000 mAh battery at 100 mA without being limited by the 7h timeout. Thanks for your support!

nPM1100 Charging Timeout with Low Charge Current – Workaround for Long Charge Duration

Dzmitry 1 month ago

Hi Nordic team,

we are using the nPM1100 PMIC together with an nRF52840 and are encountering limitations due to the charging timeout.

Charging stops after approximately 7 hours (TOUTcharge), even though the battery is far from full.

Is there any way to extend or disable the TOUTcharge timeout?
Is it acceptable to periodically restart charging by resetting the PMIC with USB connected?
Proposed workaround:
- Detect timeout via ERR + CHG + VBAT
- Enter ship mode via SHPHLD
- Wake up via RTC → restart charging cycle
Are there any risks with repeating this process over long charging durations (e.g., 40+ hours)?
Is there a recommended approach for low-current charging scenarios with large batteries?

Enable reliable charging of a 4000 mAh battery at 100 mA without being limited by the 7h timeout.

Thanks for your support!