Overview

LC709205F is a Fuel Gauge for 1−Cell Lithium−ion/Polymer

batteries. It is part of our Smart LiB Gauge family of Fuel Gauges

which measure the battery RSOC (Relative State Of Charge) using its

unique algorithm called HG−CVR2. The HG−CVR2 algorithm

provides accurate RSOC information even under unstable conditions

(e.g. changes of battery; temperature, loading, aging and

self−discharge). An accurate RSOC contributes to the operating time

of portable devices. The Fuel Gauge (in other words, Gas Gauge,

Battery Monitor or Battery Gauge) feature of HG−CVR2 algorithm

makes LSI highly applicable in various application. The LSI can

immediately start battery measurement by setting a few parameters

after battery insertion. Learning cycles that make complicated

manufacturing process of applications can be avoided.

The LSI also supports battery safety by alarm functions and SOH

(State of Health) reporting to the application processor. The operating

consumption current is very low 2 A and it is suitable for applications

such as wearables and 1 series N parallel batteries.

Features

• HG−CVR2 Algorithm Technology

♦ Accurate RSOC of Aging Battery

♦ Stable Gauging by Automatic Convergence of Error

♦ Immediate Accurate Gauging after Battery Insertion

♦ Eliminates Learning Cycle

• Low Power Consumption

♦ 2 A Operational Mode Current

• Improvement of the Battery Safety by Alarm Function

RSOC / Voltage / Current / Temperature

• Battery Lifetime Measurement

SOH / Cycle Count / Operating Time

Full Charge Capacity / Remaining Capacity

• Remaining Time Estimation

Time to Full / Time to Empty

• Three Temperature Inputs

♦ Inputs to sense two NTC Thermistors

♦ Via I2C

• Detection of Battery Operating Conditions

Charging / Discharging

• Detection of Battery Insertion

• I2C Interface (supported up to 400 kHz)

• These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS

Compliant

Applications

• Wearables / IoT Devices

• Smartphones/PDA Devices

• Digital Cameras

• Portable Game Players

• USB-related Devices