Preliminary Datasheet

LP28009

LP28009 – 02

May.-2013

www.lowpowersemi.com

Page 1 of 12

Single and Dual Cell Li+ Battery Charger IC

–LP28009

General Description

The LP28009 is a fully integrated low cost single-cell

and dual cell Li-Ion battery charger IC ideal for

portable applications. The LP28009 is capable of

being powered up from AC adapter. The LP28009

enters sleep mode when AC adapter is removed. The

LP28009 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 AC adapter

charge current can be programmed up to 1.2A with

an external resister. The internal thermal feedback

circuitry regulates the die temperature to optimize the

charge rate for all ambient temperatures. The

LP28009 features 18V maximum rating voltages for

AC adapter. The other features are under voltage

protection, over voltage protection for AC adapter

supply and battery temperature monitoring.

Order Information

LP28009 □ □ □ □ □

F: Pb-Free

Package Type

SP: SOP-8(EP)

Output Voltage

42: 4.2V

84: 8.4V

Applications



Portable Media Players/MP3 players



Cellular and Smart mobile phone



PDA/DSC



Bluetooth Applications

Features



18V Maximum Rating for AC Adapter



Internal Integrate P-MOSFETs



AC Adapter Power Good Status Indicator



Charge Status Indicator



Under Voltage Protection



Over Voltage Protection



Automatic Recharge Feature



Battery Temperature Monitoring



Small 8-Lead SOP(EP) Package



Thermal Feedback Optimizing Charge Rate



ROHS Compliant and 100% Lead (Pb)-Free

Marking Information

Typical Application Circuit

BATTERY

Q1

LPM9013

RED

I/O CTRL

10uF

10uF

PGOOD

3

CHRG_S

2

GND

4

ISETA

5

ACIN

1

EN

6

BATT

8

NC

7

GND

9

LP28009-42SPF

VIN

Q8

LPM9013

RED

I/O CTRL

10uF

10uF

VIN

PGOOD

3

CHRG_S

2

GND

4

ISETA

5

ACIN

1

EN

6

BATT

8

NC

7

GND

9

LP28009-84SPF

BATT

Device

Marking Package

Shipping

LP28009

SP:SOP-8 3K/REEL