LP5522

GND

GNDT

CTRL

VDD

ISET

LED

LP5522

www.ti.com

SNVS488 – JUNE 2007

Programmable LED Driver

Check for Samples: LP5522

1

FEATURES

•

0.2 uA typical shutdown current

•

Autonomous operation without external clock

2

•

Programmable blinking sequence

•

Micro SMD-6 package with 0.4 mm pitch:

–

1 to 3 programmable pulses

–

1.215 mm x 0.815 mm x 0.6 mm (LxWxH)

–

1 ms to 255 ms LED on time

–

10 ms to 2500 ms LED off time

APPLICATIONS

–

Single or continuous run of programmed

•

Indicator lights

blinking sequence

•

Phone cosmetics

•

Constant current high side output driver

•

Toys

•

Adjustable current with external resistor

DESCRIPTION

The LP5522 is a simple single wire programmable LED controller in six bump micro SMD package. It provides

constant current flow through high side driver. Output current can be set from 1 mA to 20 mA by using an

external resistor on the ISET pin. If no external resistor is used, output current is set to 5 mA default current. The

LP5522 is controlled using only one signal. The signal controls either directly the LED driver or it launches

previously programmed blinking sequence.

The LP5522 works autonomously without a clock signal from the master device. Very low LED driver headroom

voltage makes possible to use supply voltages close to LED forward voltage. Current consumption of the LP5522

is minimized when LED is turned off and once controller is disabled all supporting functions are also shut down.

Very small micro SMD package together with minimum number of external components is a best fit for handheld

devices.

Typical Application

1

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.

2

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.