CW2218B is ultra low power consumption fuel gauging IC for Lithium-ion batteries used in portable and wearable devices. The CW2218B tracks Li+ battery’s operation condition, including voltage, current and temperature and performs state-of-the-art algorithm to calculate the relative SOC, SOH and Cycles of the battery. It includes a 14-bit ADC for voltage and temperature measurement a 16-bit ADC for current measurement, a precision voltage reference circuit and build-in NTC bias circuits. It uses I2C compatible serial interface that operates in standard mode or fast mode.

Features

• System-Side or Pack-Side Fuel Gauging

• 14-bit ADC for Cell Voltage and Temperature Measurement

• 16-bit ADC for Current Measurement

• No Offset Accumulation During Life Time

• Alert for Low SOC

• External Thermistor or Host reported Temperature

• Low Power Consumption

      • Active Mode 5μA

      • Sleep Mode 0.5μA

• I2C Interface

• Package: WLCSP-9 2.08mmx1.58mm

Application Field

• Smart Watch

• TWS earbuds    

• IOT Device    

Application Circuits