LTC2941-1
1A I2C Battery Gas Gauge
with Internal Sense Resistor
Features Description Indicates Accumulated Battery Charge and
Discharge
n SMBus/I2C Interface
n Integrated 50mО© High Side Sense Resistor
n В±1A Sense Current Range
n High Accuracy Analog Integratio 1% Charge Accuracy
n Configurable Alert Output/Charge Complete Input
n 2.7V to 5.5V Operating Range
n Quiescent Current Less than 100ВµA
n Small 6-Pin 2mm Г— 3mm DFN package The LTCВ®2941-1 measures battery charge state in batterypowered handheld PC and portable product applications.
Its operating range is perfectly suited for single cell Li-Ion
batteries. A precision coulomb counter integrates current
through an internal sense resistor between the battery’s
positive terminal and the load or charger. The measured
charge is stored in internal registers. An SMBus/I2C interface accesses and configures the device. n Applications n n n n n The LTC2941-1 features programmable high and low
thresholds for accumulated charge. If a threshold is exceeded, the device communicates an alert using either the
SMBus alert protocol or by setting a flag in the internal
status register.
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