Datasheet > RT9428WSC

RT9428WSC

更新时间： 2024-02-19 10:17:40

品牌	Logo	应用领域
立锜 - RICHTEK		电池仪表
页数	文件大小	规格书
14页	212K
描述
Host-Side Single Cell Lithium Battery Gauge

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RT9428WSC 数据手册

RT9428

Host-Side Single Cell Lithium Battery Gauge

General Description

Features

^Host-Side Fuel Gauging

The RT9428 is a compact, host-side fuel gauge IC for

lithium-ion (Li+) battery-powered systems.

^Precision Voltage Measurement 7.5mV Accuracy

^Accurate Relative Capacity (RSOC) Calculated from

Voltaic Gauge Algorithm with Temperature

Compensation

For the embedded Fuel Gauge function, the state-of-

charge (SOC) calculation is based on the battery voltage

information and the dynamic difference between battery

voltage and relaxed OCV, by using iteration to estimate

the increasing or decreasing SOC.

^No Accumulation Error on Capacity Calculation

^No Battery Relearning Necessary

^No Current Sense Resistor Required

^External Alarm/Interrupt for Low Battery Alert

^I²C Compatible Interface

Voltage-based algorithm can support smoothly SOC and

does not accumulate error with time and current. That is

an advantage compared to coulomb counter which suffer

from SOC drift caused by current-sense error and battery

self-discharge. The disadvantage of voltage-based fuel

gauge, it can report incremental SOC (%), but can't report

capacity (mAh).

^Low Power Consumption

^RoHS Compliant and Halogen Free

Applications

 Smartphones

A quick sensing operation provides a good initial estimate

of the battery's SOC. This feature allows the IC to be

located on system side, reducing cost and supply chain

constraints on the battery. Measurement and estimated

capacity data sets are accessed through an I²C interface.

 Tablet PC

 Digital Still Cameras

 Digital Video Cameras

 Handheld and PortableApplications

The RT9428 is available in the WL-CSP-8B 1.6x1.52 (BSC)

package.

Simplified Application Circuit

PMIC_VBAT

PACK+

System

Processor

RT9428

VBAT

VDD

IRQ

ALERT

Li +

Protection

Circuit

SDA

SCL

SDA

SCL

TEST

GND

PACK-

PMIC_GND

is a registered trademark of Richtek Technology Corporation.

DS9428-01 October 2014

www.richtek.com

12 3 4 5 6 7...14

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