Features of LTC2941 Battery Gas Gauge with I2C Interface:
- Indicates Accumulated Battery Charge and Discharge
- High Accuracy Analog Integration
- High Side Sense
- 1% Charge Accuracy
- ±50mV Sense Voltage Range
- SMBus/I2C Interface
- Configurable Alert Output/Charge Complete Input
- 2.7V to 5.5V Operating Range
- Quiescent Current Less Than 100μA
The DC1496B-A is a demonstration board for LTC2941 battery gas gauge with I2C interface. The LTC2941 measures battery charge state in battery-supplied 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 a 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.
The LTC2941 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. The LTC2941 requires only a single low value external sense resistor to set the current range.
Key Applications: Low Power Handheld Products, Cellular Phones, MP3 Player, Cameras, GPS