LTC2943IDD#TRPBF

LTC2943 is a multicell battery gas gauge with temperature, voltage and current measurement. This 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 14bit no latency ΔΣ™ ADC. The measurement is stored in internal registers accessible via the onboard I²C/SMBus interface. It 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. Typical applications are power tools, electric bicycles, portable medical equipment and video cameras.

• Requires only a single low value sense resistor to set the measured current range
• Measures accumulated battery charge and discharge
• 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
• Supply voltage is 3.6 to 20V
• Supply current is 120µA (battery gas gauge on, ADC sleep, TA=25°C)
• 8-lead plastic DFN package
• Temperature rating range from –40°C to 85°C

Notes

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party