Integrated CMOS Current Sensing Systems for Coulomb Counters

Coulomb counting is a widely used method to estimate battery state-of-charge (SoC). It involves measuring and integrating the battery’s current to determine its net charge flow.

A ±5A Integrated Current-Sensing System With ±0.3% Gain Error and 16 μA Offset From −55°C to +85°C

This paper presents an integrated current-sensing system (CSS) that is intended for the use in battery-powered devices. It consists of a 10 mΩ on-chip metal shunt resistor, a switched-capacitor (SC) ΔΣ ADC, and a dynamic bandgap reference (BGR) that provides the ADC's reference voltage and also senses the shunt's temperature. The CSS is realized...