General Description:

The CW2015 is an ultra-compact, low-cost, hostside/pack-side, sensing resistor free, fuel gaugingsystem IC for Lithium-ion(Li+) based batteries inhandheld and portable devices.CW2015 tracks Li+ battery’s operational conditionand uses state-of-art algorithm to report therelative State-of-Charge (SOC) of very differentbattery chemistry systems (LiCoOx, polymer Li-ion,LiMnOx etc.).CW2015 includes a 14-bit Sigma-Delta ADC, aprecision voltage reference and build-in accuratetemperature sensor. The IC allows the end-user toeliminate the expensive sensing resistor whichoccupies large board area. And the IC also sendsout the alarm signal if the battery SOC levelreaches pre-programmed threshold.Quick start function offers the possibility to makean initial estimation of the battery’s SOC, whichalso enables the IC to be located on system sideor pack side, giving the flexibility to system makeron pack selection.CW2015 uses a 2-wire I2C compatible serialinterface that operates in standard (100 kHz) orfast (400 kHz) mode.

Features:

 System-Side or Pack-Side Fuel Gauging

 3% Maximum Total SOC Measurement Error

 14-bit Sigma-Delta ADC for Temperature andCell Voltage Measurement

 Precision Voltage Measurement

 No Offset Accumulation During Life Time

 No Full-to-Empty Battery Learning CyclesNecessary

 No Sense Resistor Required

 SOC and RRT available

 External Alarm/Interrupt for Low-BatteryWarning Available

 Patented “FastCali” gas gauging algorithm

 Calibration After Quick Soft-Reset

 Very Low Active and Sleep Power Consumption

• Normal mode 15A

• Sleep mode <1A

 General I2C interface

 Tiny, Lead(Pb)-Free, TDFN Package

Applications:

 Smartphone

 Tablet PCs

 Handheld and Portable Applications