The LTC2941CDCB#TRPBF 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 LTC2941CDCB#TRPBF 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 LTC2941CDCB#TRPBF requires only a single low value external sense resistor to set the current range.
Integrated Sense ResistorLTC2941NoLTC2941-1Yes
Feature
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
Small 6-Pin 2mm × 3mm DFN and 8-Lead MSOP Packages
Applications
Catalogue
FPGA / CPLD
Memory
MOS 
MCU 
DSP
OCEP
Secondary 
Other 
