RT9511

更新时间： 2024-02-07 13:27:23

品牌	Logo	应用领域
立锜 - RICHTEK		转换器电池单锂离子电池
页数	文件大小	规格书
24页	525K
描述
Fully Integrated Battery Charger with Two Step-Down Converters

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中文翻译

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技术参数
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RT9511 技术参数

Status：	Active	Vin (min) (V)：	4.5
Vin (max) (V)：	12	Battery Charge Voltage (max) (V)：	4.2
Battery Charge Current (max) (A)：	1	Input Source：	AC Adapter;USB
Features：	Enable Input;OVP	Package Type：	WQFN4x4-24

RT9511 数据手册

RT9511

Fully Integrated Battery Charger with Two

Step-Down Converters

General Description

Features

^zBattery Charger

The RT9511 is a fully integrated low cost solution with a

single-cell Li-Ion battery charger and two high efficiency

step-down DC/DC converters ideal for portable

applications.

` Automatic Input Supplies Selection

` 18V Maximum Rating for AC Adapter

` Integrated Selectable 100mA and 500mA USB

Charge Current

The Battery Charger is capable of being powered up from

AC adapter and USB (Universal Serial Bus) port inputs

which can automatically detect and select theAC adapter

and the USB port as the power source for the charger.

The Battery Charger enters sleep mode when both

supplies are removed. The Battery Charger optimizes the

charging task by using a control algorithm including

preconditioning mode, fast charge mode and constant

voltage mode. The charging task is terminated as the

charge current drops below the preset threshold. The USB

charge current can be selected from preset ratings100mA

and 500mA, while the AC adapter charge current can be

programmed up to 1Awith an external resister. The internal

thermal feedback circuitry regulates the die temperature

to optimize the charge rate for all ambient temperatures.

The Battery Charger features 18V and 7V maximum rating

voltages forAC adapter and USB port inputs respectively.

The other features are external programmed safety timer,

under voltage protection, over voltage protection for AC

adapter supply, battery temperature monitoring and charge

status indicator.

` Internal Integrated Power FETs

` Charge Status Indicator

` External Capacitor Programmable Safety Timer

` Under Voltage Protection

` Over Voltage Protection

` Automatic Recharge Feature

` Battery Temperature Monitoring

` Thermal Feedback Optimizing Charge Rate

` Power Path Controller

z Step-Down DC/DC Converter

` Adjustable Output from 0.6V to VIN

` 1A Output Current

` 95% Efficiency

` No Schottky Diode Required

` 1.5MHz Fixed-Frequency PWM Operation

z Small 24-Lead WQFN Package

z RoHS Compliant and Halogen Free

Applications

z MP3/MP4 Player

z GPS

The high-efficiency step-downDC/DC converter is capable

of delivering 1A output current over a wide input voltage

range from 2.5V to 5.5V, the step-downDC/DC converter

is ideally suited for portable electronic devices that are

powered from 1-cell Li-ion battery or from other power

sources such as cellular phones, PDAs and hand-held

devices. Two operating modes are available including :

PWM/Low-Dropout autoswitch and shut-down modes. The

Internal synchronous rectifier with low R_DS(ON)dramatically

reduces conduction loss at PWM mode. No external

Schottky diode is required in practical application.

z Digital Photo Frame

z Hand heldDevice

Marking Information

For marking information, contact our sales representative

directly or through a Richtek distributor located in your

area.

The RT9511 is available in a WQFN -24L 4x4 package.

DS9511-01 April 2011

www.richtek.com

12 3 4 5 6 7...24

中文翻译

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与RT9511相关器件

型号	品牌	获取价格	描述	数据表
RT9513	RICHTEK	获取价格	Linear Single Cell Li-Ion Battery Charger IC
RT9514	RICHTEK	获取价格	Linear Single Cell Li-Ion Battery Charger IC
RT9515	RICHTEK	获取价格	Linear Single Cell Li-Ion Battery Charger IC
RT9516	RICHTEK	获取价格	Linear Single Cell Li-lon Battery Charger with Single Input Supply for Portable Applicatio
RT9519	RICHTEK	获取价格	Linear Single Cell Li-lon Battery Charger with Auto Power Path Management
RT9519A	RICHTEK	获取价格	Linear Single Cell Li-lon Battery Charger with Auto Power Path Management
RT9519B	RICHTEK	获取价格	Linear Single Cell Li-lon Battery Charger with Auto Power Path Management
RT9519E	RICHTEK	获取价格	Linear Single Cell Li-lon Battery Charger with Auto Power Path Management
RT9524	RICHTEK	获取价格	Linear Single Cell Li-Ion Battery Charger IC for Portable Applications
RT9524H	RICHTEK	获取价格	Linear Single Cell Li-Ion Battery Charger IC for Portable Applications

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