DS2775G+

MAXIM INTEGRATED PRODUCTS  DS2775G+  芯片, 电量计

The is a dual cell, stand-alone Li+ fuel gauge IC with protector in 14 pin TDFN package. This device supports rechargeable lithium-ion Li+ and Li+ polymer Li-Poly batteries in mAh and as a percentage of full. Safe operation is ensured by the integrated Li+ protector. DS2775 capability includes precision measurements of voltage, temperature and current along with a cell characteristics table and application parameters. The capacity registers report a conservative estimate of the amount of charge that can be removed given the current temperature, discharge rate, stored charge and application parameters. the device offers a 16 bytes of EEPROM for use by the host system and/or pack manufacturer to store battery lot and date tracking information. The EEPROM can also be used for non-volatile storage of system and/or battery usage statistics.

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Supply voltage range is 4V to 9.2V

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Operating temperature range from -20°C to 70°C

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1-wire interface with 64bit unique ID

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High-side nFET driver and protection circuitry

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Estimates cell aging between learn cycles

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Uses low-cost sense resistor

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Allows calibration of gain and temperature coefficient

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Programmable thresholds for overvoltage and overcurrent

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32byte parameter EEPROM