Datasheet > RT9458

RT9458

更新时间： 2024-02-07 03:59:41

品牌	Logo	应用领域
立锜 - RICHTEK		电池
页数	文件大小	规格书
27页	249K
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中文翻译

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技术参数
数据手册

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RT9458 技术参数

Status：	Active	Vin (min) (V)：	4.3
Vin (max) (V)：	6	Battery Charge Voltage (max) (V)：	4.44
Battery Charge Current (max) (A)：	1.55	Input Source：	AC Adapter;USB
Features：	Adjustable Current Limit;Cycle-by-Cycle Current Limit;OCP;OVP;UVP	Package Type：	WL-CSP2.1x1.87-20(BSC)

RT9458 数据手册

RT9458

Switch-Mode Single Cell Li-Ion Battery Charger

with USB-OTG

General Description

Features

^Support Quick Start for Charger

The RT9458 is a switch-mode single cell Li-Ion/Li-Polymer

battery charger for portable applications. It integrates a

synchronous PWM controller, power MOSFETs, input

current sensing, high accuracy voltage regulation and

charge termination circuits. The RT9458 also features USB

On-The-Go (OTG).

^High Accuracy Voltage/Current Regulation

^Input Current Regulation : 100mA/500mA/700mA/

^Minimum Input Voltage Regulation : 4.1V to 4.7V

Per 0.1V Step

^Charge Voltage Regulation Accuracy : 1% (0 to

85°C)

^Charge Current Regulation Accuracy : 5%

^Built-In Input Current Sensing and Limiting

^Integrated Power MOSFETS for up to 1.55A Charge

Rate

The RT9458 optimizes the charging task by using a control

algorithm to vary the charge rate via different modes,

including pre-charge mode, fast charge mode, and constant

voltage mode. The key charge parameters can be

programmed via the I²C interface. The RT9458 resumes

the charge cycle whenever the battery voltage falls below

an internal threshold and automatically enters sleep mode

when the input power supply is removed.

 Integrated Sensing Resistors for Charging Current

Sensing

 Synchronous 1.5MHz Fixed Frequency PWM

Controller with up to 95% Duty Cycle

 Reverse Leakage Protection to Prevent Battery

Drainage

Other features include under-voltage protection, over-

voltage protection, thermal regulation and reverse leakage

protection.

 Thermal Regulation and Protection

 Over-Temperature Protection

 Input Over-Voltage Protection

 IRQ Output for Communication with I²C

 Automatic Charging

The RT9458 is available in the small WL-CSP-20B

2.1x1.87 (BSC) package.

Marking Information

4E : Product Code

 RoHS Compliant and Halogen Free

W : Date Code

4EW

Applications

 CellularTelephones

 Personal InformationAppliances

 MP3 Players

 Portable Instruments

Simplified Application Circuit

To Adaptor/USB

VIN

VMID

RT9458

OTG

SCL

SDA

IRQ

ISNSIN

BATS

GND

Battery

is a registered trademark of Richtek Technology Corporation.

DS9458-03 December 2017

www.richtek.com

12 3 4 5 6 7...27

中文翻译

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与RT9458相关器件

型号	品牌	获取价格	描述	数据表
RT9460	RICHTEK	获取价格	暂无描述
RT9465	RICHTEK	获取价格	3A Single Cell Li-on Battery Slave Switching Charg
RT9465GQW	RICHTEK	获取价格	3A Single Cell Li-on Battery Slave Switching Charg
RT9466	RICHTEK	获取价格	暂无描述
RT9467	RICHTEK	获取价格	暂无描述
RT9468	RICHTEK	获取价格	暂无描述
RT9469	RICHTEK	获取价格	暂无描述
RT9470	RICHTEK	获取价格	暂无描述
RT9470D	RICHTEK	获取价格	暂无描述
RT9470G	RICHTEK	获取价格	3A Single Cell Switching Battery Charger

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