The MAX17058/MAX17059 ICs are tiny fuel gaugesfor lithium-ion (Li+) batteries in handheld and portableequipment. The MAX17058 operates with a single Li+cell and the MAX17059 with two Li+ cells in series.The ICs use the sophisticated Li+ battery-modelingalgorithm ModelGaugeK to track the battery relativestate-of-charge (SOC) continuously over a widely varyingcharge/discharge conditions. The ModelGauge algorithmeliminates current-sense resistor and battery-learncycles required by other fuel gauges. Temperaturecompensation is implemented using the system microcontroller.
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