LP5524

ENA

VIN

ISET

D2B

GND

ENB

D1B

D2A

D1A

(optional)

LP5524

www.ti.com

SNVS500 – JULY 2007

LP5524 Parallel LED Driver with PWM Brightness Control in Micro SMD Package

Check for Samples: LP5524

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FEATURES

•

PWM Brightness Control

•

Over-Current Protection

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•

High side LED driver

•

Wide Input Voltage Range: 2.7V to 5.5V

•

Drives 4 LEDs with Up to 25mA per LED

•

Ultra-Small Solution Size:

APPLICATIONS

–

No External Components

•

Sub display Backlight

–

Micro SMD-9 Package with 0.4 mm pitch:

•

Keypad LED Backlight

–

1.215mm x 1.215mm x 0.6mm (LxWxH)

•

Indicator LED

•

0.4% Typical Current Matching

DESCRIPTION

The LP5524 is a highly integrated dual-zone LED driver that can drive up to four LEDs in parallel with a total

output current of 100mA. Regulated high side internal current sources deliver excellent current and brightness

matching in all LEDs.

LED driver current sources are split into two independently controlled banks for driving secondary displays,

keypad and indicator LEDs. Brightness control is achieved by applying PWM signals to each enable pin. Default

LED current is factory-programmable and an optional external resistor can be used to set LED current to user

programmable values.

LP5524 is available in National’s tiny 9-bump thin micro SMD package.

Typical Application

Connection Diagram

Connection Diagrams and Package Mark Information

Micro SMD-9 package, 1.215 x 1.215 x 0.60 mm body size, 0.4 mm pitch

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Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

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All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Copyright © 2007, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.