The LTC2943CDD-1#TRPBF measures battery charge state, battery voltage, battery current and its own temperature in portable product applications. The wide input voltage range allows use with multicell batteries up to 20V. A precision coulomb counter integrates current through a sense resistor between the battery’s positive terminal and the load or charger. Voltage, current and temperature are measured with an internal 14-bit No Latency ΔΣ™ ADC. The measurements are stored in internal registers accessible via the onboard I2C/SMBus Interface.
The LTC2943CDD-1#TRPBF features programmable high and low thresholds for all four measured quantities. If a programmed 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 LTC2943CDD-1#TRPBF requires only a single low value sense resistor to set the measured current range.
Feature
- Measures Accumulated Battery Charge and Discharge
- 3.6V to 20V Operating Range for Multiple Cells Application
- 14-Bit ADC Measures Voltage, Current and Temperature
- 1% Voltage, Current and Charge Accuracy
- ±50mV Sense Voltage Range
- High Side Sense
- General Purpose Measurements for Any Battery Chemistry and Capacity
- I2C/SMBus Interface
- Configurable Alert Output/Charge Complete Input
- Quiescent Current Less Than 120μA
- Small 8-Lead 3mm × 3mm DFN Package
Applications
- Power Tools
- Electric Bicycles
- Portable Medical Equipment
- Video Cameras
