Disabling Charge Mode to Avoid External Battery Charging

[Gabriel Mergh Oliveira]

Hello Community!

I want to use the npM1100 as a power management device in my project. The external battery to be used is the ER26500 and it is not rechargeable.

If I activate ship mode and put the ICHG pin in ground, can I confirm that the npm1100 will not try to charge the external battery that is connected to it?

Should I then use configuration 3?

[Simonr]

Hi Gabriel

Regarding the charging on nPM1100:

If you use a non-rechargeable battery, you can just leave VBUS disconnected altogether, and that should make it not able to charge at all. However, if VBUS is used as I.E. a power source, there is no way to ensure that it won't try to charge the battery on the PMIC itself.

One thing you can do to work around this is to connect a 1kΩ resistor between the NTC pin and GND. A 10k thermistor would be 85°C at 1kΩ, and the PMIC will never charge a battery at 85°C.

Best regards,

Simon