Determining the approximate battery level using the comparator in nRF52820

[backstreet.devisor]

Good Day.

I want to measure the approximate voltage level on the battery in the nrf52820 microcontroller using a comparator (COMP) operating in Single-ended mode. I use the VDD contact as a reference voltage (3V coming from the PMIС nPM1100). The connection diagram is shown in the screenshot.

Please help me understand what values of resistors (R1, R2) and capacitor (C1) should be used for the best measurement performance? I will be glad for any help.

[Karl Ylvisaker]

Hello,

Thank you for your patience with this.

I want to measure the approximate voltage level on the battery in the nrf52820 microcontroller using a comparator (COMP) operating in Single-ended mode.

Please see this other ticket on the subject for an in-depth discussion of estimating remaining battery charge using the comparator peripheral.

Please help me understand what values of resistors (R1, R2) and capacitor (C1) should be used for the best measurement performance?

Please see this guide on how to calculate the component values of a voltage divider for measuring Li-Po batteries.

Best regards,
Karl

[backstreet.devisor]

Thanks Karl for the links to useful information. If I have any questions, I will write.

[Karl Ylvisaker]

backstreet.devisor said:

Thanks Karl for the links to useful information.

No problem at all, I am happy to help!

backstreet.devisor said:

If I have any questions, I will write.

Great! Please do not hesitate to ask if you encounter any issues or questions.

Best regards,
Karl