Gas Gauge IC Series
CW2015-DS V2.1
Mob:13510032582 QQ:316224953 Mail:fred@gold-luck.com
CW2015
Low-Cost Fuel Gauge IC with Low-SOC Alert
Features
General Description
The CW2015 is an ultra-compact, low-cost,
host-side/pack-side, sensing resistor free, fuel gauging
system IC for Lithium-ion(Li+) based batteries in
handheld and portable devices.
CW2015 tracks Li+ battery’s operational condition and
uses state-of-art algorithm to report the relative
State-of-Charge (SOC) of very different battery
chemistry systems (LiCoOx, polymer Li-ion, LiMnOx
etc.).
CW2015 includes a 14-bit Sigma-Delta ADC, a
precision voltage reference and build-in accurate
temperature sensor. The IC allows the end-user to
eliminate the expensive sensing resistor which
occupies large board area. And the IC also sends out
the alarm signal if the battery SOC level reaches
pre-programmed threshold.
Quick start function offers the possibility to make an
initial estimation of the battery’s SOC, which also
enables the IC to be located on system side or pack
side, giving the flexibility to system maker on pack
selection.
CW2015 uses a 2-wire I2C compatible serial interface
that operates in standard (100 kHz), fast (400 kHz).
System-Side or Pack-Side Fuel Gauging
3% Maximum Total SOC Measurement Error
14-bit Delta Sigma ADC for Temperature and Cell
Voltage Measurement
Precision Voltage Measurement
No Offset Accumulation During Life Time
No Full-to-Empty Battery Learning Cycles
Necessary
No Sense Resistor Required
SOC and RRT available
External Alarm/Interrupt for Low-Battery
Warning Available
Patented “FastCali” gas gauging algorithm
Calibration After Quick Soft-Reset
Very Low Active and Sleep Power Consumption
Normal mode 15uA
Sleep mode
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