RT9511 RICHTEK [Richtek Technology Corporation], RT9511 Datasheet

RT9511

Manufacturer Part Number

RT9511

Description

Fully Integrated Battery Charger with Two Step-Down Converters

Manufacturer

RICHTEK [Richtek Technology Corporation]

Datasheet

1.RT9511.pdf (24 pages)

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

RT9511GQW

Manufacturer:

IDT

Quantity:

3 500

Current page: 1 of 24
Download datasheet (526Kb)

Fully Integrated Battery Charger with Two

Step-Down Converters

General Description

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.

The Battery Charger is capable of being powered up

which can automatically detect and select

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

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 1A with 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 for AC 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.

The high-efficiency step-down

of delivering 1A output current over a wide input voltage

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

reduces conduction loss at PWM mode. No external

Schottky diode is required in practical application.

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

DS9511-01 April 2011

adapter and USB (Universal Serial Bus) port inputs

task by using a control algorithm including

DC/DC converter is capable

DS(ON)

the AC

dramatically

adapter

from

Features

Applications

Marking Information

For marking information, contact our sales representative

directly or through a Richtek distributor located in your

area.

Battery Charger

Step-Down DC/DC Converter

Small 24-Lead WQFN Package

RoHS Compliant and Halogen Free

MP3/MP4 Player

GPS

Digital Photo Frame

Hand held Device

Charge Current

95% Efficiency

1A Output Current

Charge Status Indicator

Adjustable Output from 0.6V to VIN

No Schottky Diode Required

Automatic Input Supplies Selection

18V Maximum Rating for AC Adapter

Integrated Selectable 100mA and 500mA USB

Internal Integrated Power FETs

Under Voltage Protection

Over Voltage Protection

Automatic Recharge Feature

Battery Temperature Monitoring

Power Path Controller

1.5MHz Fixed-Frequency PWM Operation

External Capacitor Programmable Safety Timer

Thermal Feedback Optimizing Charge Rate

RT9511

www.richtek.com

Related parts for RT9511

Related keywords

RT9511 datasheet
RT9511 data sheet
RT9511 pdf datasheet
RT9511 component
RT9511 part
RT9511 distributor
RT9511 RoHS
RT9511 datasheet download