RoHS Compliance Information	Size in Kbytes	Date
LP5521 Programmable Three Channel LED Driver	832 Kbytes	6-May-08	View Online Download

Part Number

Package

Factory Lead Time

Models

Samples & Electronic Orders

Budgetary Pricing

Std Pack Size

Package Marking Format

Type

Pins

Spec.

MSL Rating

Peak Reflow

RoHS Report

CAD Symbols

Weeks

Qty

Qty

$US each

LP5521TM

MICRO SMD

20

NOPB

1

260

RoHS

N/A

Full production

N/A

1K+

$0.90

reel of 250

XYTT I 5521

6 weeks

N/A

LP5521TMX

MICRO SMD

20

NOPB

1

260

RoHS

N/A

Full production

N/A

1K+

$0.90

reel of 3000

XYTT I 5521

6 weeks

N/A

LP5521YQ

LLP

24

NOPB

1

260

RoHS

N/A

Full production

N/A

1K+

$1.00

reel of 1000

NS UZXYTT L5521YQ

6 weeks

N/A

LP5521YQX

LLP

24

NOPB

1

260

RoHS

N/A

Full production

N/A

1K+

$1.00

reel of 4500

NS UZXYTT L5521YQ

6 weeks

N/A

General Description

The LP5521 is a three channel LED driver designed to produce variety of lighting effects for mobile devices. High efficiency charge pump enables LED driving over full Li-Ion battery voltage range. The device has a program memory for creating variety of lighting sequences. When program memory has been loaded, LP5521 can operate independently without processor control.

LP5521 maintains excellent efficiency over a wide operating range by automatically selecting proper charge pump gain based on LED forward voltage requirements. LP5521 is able to automatically enter power-save mode, when LED outputs are not active and thus lowering current consumption.

Three independent LED channels have accurate programmable current sources and PWM control. Each channel has program memory for creating desired lighting sequences with PWM control.

LP5521 has a flexible digital interface. Trigger I/O and 32 kHz clock input allow synchronization between multiple devices. Interrupt output can be used to notify processor, when LED sequence has ended. LP5521 has four pin selectable I 2C addresses. This allows connecting up to four parallel devices in one I 2C bus. GPO and INT pins can be used as a digital control pin for other devices.

LP5521 requires only four small and low cost ceramic capacitors.

LP5521 is available in tiny 2.1x1.7x0.6 mm microSMD-20 package and in 4.0x5.0x0.8 mm bumped LLP-24 package.

Comprehensive application tools are available, including command compiler for easy LED sequence programming.

Design Tools

Title	Size in Kbytes	Date
Powering Backlights in Portable Devices			View

If you have trouble printing or viewing PDF file(s), see Printing Problems.

Application Notes

Title	Size in Kbytes	Date
AN-1632: AN-1632 LP5521 Evaluation Kit	2039 Kbytes	27-Aug-08	Download
AN-1523: AN-1523 LP5521 Power Efficiency Considerations	5526 Kbytes	17-Apr-08	Download
AN-1562: AN-1562 LP5521 Programming Considerations	761 Kbytes	17-Apr-08	Download

More Application Notes

Title	Size in Kbytes	Date
AN-1502: AN-1502 LP5526 Evaluation Kit	2362 Kbytes	12-Mar-07	Download
AN-1636: AN-1636 LP5522 Evaluation Kit	1568 Kbytes	13-Jun-07	Download
AN-1636 (Chinese): AN-1636 LP5522 Evaluation Kit	435 Kbytes
AN-1702: AN-1702 LP5524 Evaluation Kit	491 Kbytes	17-Mar-08	Download
AN-1442: Application Note 1442 Design and Programming Examples for Lighting Management Unit LP5526	749 Kbytes	26-Jan-07	Download
AN-1442 (Chinese): Application Note 1442 Design and Programming Examples for Lighting Management Unit LP5526	638 Kbytes