SLEEP mode is an ultra low power operating mode. It is entered automatically if the feature is enabled (OpConfig [SLEEP] = 1) and AverageCurrent() is below the programmable level Sleep Current (default = 10 mA). Once entry into SLEEP mode has been qualified, but prior to entering it, the fuel gauge may perform an ADC autocalibration to minimize the offset.

During SLEEP mode, the fuel gauge remains in a very-low-power state and automatically takes data measurements every 20 seconds.

After taking the measurements on the 20-second interval, the fuel gauge will exit SLEEP mode when AverageCurrent() rises above Sleep Current (default = 10 mA). Alternatively, an early data measurement before the 20-second internal is possible if the instantaneous current detected by an internal hardware comparator is above an approximate threshold of ±30 mA.

Figure 7-5 Power Mode Diagram