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Analog Devices MAX17330 1-Cell Charger, Fuel Gauge & Protector is a 28μA IQ stand-alone charger, fuel gauge, protector, and battery internal self-discharge detection IC for 1-cell lithium-ion/polymer batteries. When a voltage source is present, the MAX17330 regulates charging by modulating the charge N-FET, using AccuCharge™ charger technology. The MAX17330 regulates charge voltage, current, and FET temperature. Stand-alone charging is supported by flexible configuration in non-volatile memory.
The Analog Devices MAX17330 ideal diode circuit supports a quick response to system transients and adapter removal with the low voltage drop across the CHG FET. The IC uses the ModelGauge™ m5 EZ algorithm that combines the short-term accuracy and linearity of a coulomb counter with the long-term stability of a voltage-based fuel gauge to provide industry-leading accuracy. The IC automatically compensates for cell aging, temperature, and discharge rate while providing accurate state-of-charge (SOC) in milliampere-hours (mAh) or percentage (%) over a wide range of operating conditions.
The IC monitors the voltage, current, temperature, and state of the battery to protect against over/under voltage, overcurrent, short-circuit, over/under temperature, and overcharge conditions. It also includes internal self-discharge protection using external high-side N-FETs to ensure that the lithium-ion/polymer battery operates under safe conditions, which prolongs the life of the battery.
