Datasheet > RT9422A

RT9422A

更新时间： 2025-07-26 17:01:35

品牌	Logo	应用领域
立锜 - RICHTEK		仪表
页数	文件大小	规格书
18页	1140K
描述
Pack Side Single Cell Fuel Gauge

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中文翻译

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RT9422A 数据手册

RT9422A

Pack Side Single Cell Fuel Gauge

General Description

Features

 Support Pack Side Fuel Gauging

The RT9422A Li-Ion/Li-Polymer battery fuel gauge is a

microcontroller peripheral that provides fuel gauging for

single-cell battery packs. The RT9422A resides within

the battery pack and manages a non-removable

battery or removable battery pack.

 Battery Fuel Gauge for 1-Series (1sXp)

Li-Ion/Li-Polymer Applications

 State of Charge (SOC) Calculated by

VoltaicGauge^TMwith Current Sensing (VGCS)

 No Accumulation Error on Capacity Calculation

 Battery SOC, SOH, FCC, TTE and Cycle Count

Report

The RT9422A reports StateOfCharge, StateOfHealth,

FullChargeCapacity, TimeToEmpty and CycleCount

based on the Voltaic Gauge with Current Sensing

(VGCS) algorithm by using the voltage difference

between battery voltage and OCV to calculate the

increasing or decreasing SOC, with current sensing

compensation to report battery SOC.

 Voltage Measurement : ±7.5mV

 Current Measurement : ±1%

 Battery Temperature Measurement: ±3°C

 Battery Monitor with Alert Indicator for Voltage,

Temperature and SOC

Voltaic Gauge with Current Sensing 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.

 Non Volatile Memory for Lifetime Logging,

Battery Characterizing and Manufacturer

Information Storage

 Battery Secondary Safety Protection

 SHA-1/HMAC for Battery Pack Authentication

 High C-Rate Battery Charging Compliance

 Low Power Consumption

The RT9422A provides complete battery status monitor

with interrupt alarm function. It could alert to host

processor actively when condition of battery

 Low-Value Sense Resistor (1mto 40m,

Typical 10m)

over/under-voltage

and

over-temperature

charging/over-temperature in discharging. Especially

for high C-rate battery charging application, it can

measure battery voltage by kelvin sense connection to

eliminate the IR drop effect for optimal charging profile

and safety. More useful alarm functions are Under

SOC alert and SOC Change.

 12 Pin WDFN Package with 0.4mm Pitch

 I²C Controlled Interface

Applications

 Smartphones

 Tablet PC

 Wearable Device

The secondary safety features of the RT9422A can be

used to indicate more serious faults via the SAFE pin.

 Digital Still Cameras

 Digital Video Cameras

 Handheld and Portable Applications

This pin can be used to blow an in-line fuse to

permanently disable the battery pack from charging or

discharging. The SAFE pin also can used to detect

secondary protection IC status and log battery status in

the NVM when protection be triggered.

To prevent battery pack cloning, the RT9422A

integrates SHA-1/HMAC authentication with a 128-bit

secret key.

is a registered trademark of Richtek Technology Corporation.

DS9422A-00 October 2020

www.richtek.com

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与RT9422A相关器件

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RT9427R	RICHTEK	获取价格	5μA System Side Single Cell Fuel Gauge with B
RT9428	RICHTEK	获取价格	Host-Side Single Cell Lithium Battery Gauge
RT9428WSC	RICHTEK	获取价格	Host-Side Single Cell Lithium Battery Gauge
RT9430	RICHTEK	获取价格	SHA-256 Battery Authenticator with 34 Bytes User Memory
RT9440	RICHTEK	获取价格	2-5 Series Cell Fuel Gauge with Integrated Protector Solution for Li-Ion Battery Packs
RT9451	RICHTEK	获取价格	暂无描述
RT9451GQW	RICHTEK	获取价格	Switch-Mode Single Cell Li-ion Battery Charger

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