RT9502 RICHTEK [Richtek Technology Corporation], RT9502 Datasheet

RT9502

Manufacturer Part Number

RT9502

Description

Linear Single Cell Li-Ion Battery Charger IC with Dual Input Supply

Manufacturer

RICHTEK [Richtek Technology Corporation]

Datasheet

1.RT9502.pdf (13 pages)

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Download datasheet (319Kb)

Linear Single Cell Li-Ion Battery Charger IC with

Dual Input Supply

General Description

The RT9502 is a fully integrated low cost single-cell Li-

Ion battery charger IC ideal for portable applications. The

RT9502 is capable of being powered up from AC adapter

and USB (Universal Serial Bus) port inputs. The RT9502

can automatically detect and select the AC adapter and

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

RT9502 enters sleep mode when both supplies are

removed.

The RT9502 optimizes the charging task by using a control

algorithm including precondition 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 ratings of 100mA 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 RT9502 features 18V and 7V maximum rating voltages

for AC adapter and USB port inputs respectively. The other

features are under voltage protection, over voltage

protection for AC adapter supply and battery temperature

monitoring.

Ordering Information

Note :

Richtek products are :

DS9502-02 April 2011

RT9502

RoHS compliant and compatible with the current require-

Suitable for use in SnPb or Pb-free soldering processes.

ments of IPC/JEDEC J-STD-020.

Package Type

QW : WDFN-10L 3x3 (W-Type)

Lead Plating System

P : Pb Free

G : Green (Halogen Free and Pb Free)

Features

Applications

Pin Configurations

Marking Information

For marking information, contact our sales representative

directly or through a Richtek distributor located in your

area.

Automatic Input Supplies Selection

18V Maximum Rating for AC Adapter

Integrated Selectable 100mA and 500mA USB

Charge Current

Internal Integrated P-MOSFETs

AC Adapter Power Good Status Indicator

Charge Status Indicator

Under Voltage Protection

Over Voltage Protection

Automatic Recharge Feature

Battery Temperature Monitoring

Small 10-Lead WDFN Package

Thermal Feedback Optimizing Charge Rate

RoHS Compliant and 100% Lead (Pb)-Free

Digital Cameras

Cellular Phones

Personal Digital Assistants (PDAs)

MP3 Players

Hand Held PCs

PGOOD

CHG_S

ACIN

GND

USB

WDFN-10L 3x3

(TOP VIEW)

GND

BATT

ISETU

ISETA

RT9502

www.richtek.com

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