RT9428WSC datasheet(1/14 Pages) RICHTEK

номер детали	RT9428WSC

подробное описание детали	Host-Side Single Cell Lithium Battery Gauge

PDF	14 Pages

Scroll/Zoom	100%

производитель	RICHTEK [Richtek Technology Corporation]

домашняя страница	http://www.richtek.com

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RT9428

®

DS9428-01

October 2014

www.richtek.com

1

©

Copyright

is a registered trademark of Richtek Technology Corporation.

Host-Side Single Cell Lithium Battery Gauge

General Description

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

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

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.

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).

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.

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

package.

Features



Host-Side Fuel Gauging



Precision Voltage Measurement

±±±±±7.5mV Accuracy



Accurate Relative Capacity (RSOC) Calculated from

Voltaic Gauge Algorithm with Temperature

Compensation



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



Low Power Consumption



RoHS Compliant and Halogen Free

Applications



Smartphones



Tablet PC



Digital Still Cameras



Digital Video Cameras



Handheld and Portable Applications

Simplified Application Circuit

VBAT

RT9428

QS

TEST

SDA

GND

VDD

SCL

System

Processor

SDA

SCL

C1

+

Li +

Protection

Circuit

ALERT

IRQ

PMIC_VBAT

PMIC_GND

PACK-

PACK+

Аналогичный номер детали - RT9428WSC

производитель	номер детали	датащи	подробное описание детали
Richtek Technology Corp...	RT9420	235Kb / 14P	Host-Side Single Cell Lithium Battery Gauge

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Аналогичное описание - RT9428WSC

производитель	номер детали	датащи	подробное описание детали
Richtek Technology Corp...	RT9420	235Kb / 14P	Host-Side Single Cell Lithium Battery Gauge
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Аналогичный номер детали - RT9428WSC

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