The nPM1300 fuel gauge provides ultra-low power battery fuel gauging without compromising on accuracy.
The fully integrated design eliminates the need for additional external components, simplifying your design process and reducing board space and cost. The nPM1300 fuel gauge can be turned off to reduce quiescent current (Iq) during sleep and power-down of the device.
To predict the battery state of charge, the nPM1300 fuel gauge requires a battery model to give a mathematical representation of a battery's behavior. Battery modeling is made possible through the nPM PowerUP computer app available in nRF Connect for Desktop. The calculated state of charge is relative to the battery's present maximum capacity and always shows 100% when the battery is fully charged, even if the actual capacity has reduced due to aging.
The nPM PowerUP battery profiling solution allows you to independently develop a battery model tailored to your specific needs. A one-time profiling of the battery using the nPM PowerUP app together with the nPM1300 Evaluation Kit (EK) and nPM Fuel Gauge Board generates the battery model. The battery model can be further evaluated in the nPM PowerUP app before integrating it in your application. For more information, see the nRF Connect SDK samples at nPM1300 fuel gauge application samples.
The fuel gauge algorithm can run on Nordic host System on Chip (SoC)s (nRF52, nRF53, nRF54, and nRF91 series) to ensure an accurate estimation of the battery state of charge by controlling and retrieving measurement information from nPM1300 through Two-wire Interface (TWI) communication. Other non-Nordic SoCs can also be used. Contact your local Nordic sales representative for more information.
The following diagram shows an overview of the fuel gauge.
