Features • Programmable blinking sequence • 1 to 3 programmable pulses • 1 ms to 255 ms LED on time • 10 ms to 2500 ms LED off time • Single or continuous run of programmed blinking sequence • Constant current high side output driver • Adjustable current with external resistor • 0.2 uA typical shutdown current • Autonomous operation without external clock • Micro SMD-6 package with 0.4 mm pitch: 1.215 mm x 0.815 mm x 0.6 mm (LxWxH) 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. Applications • Indicator lights • Phone cosmetics • Toys

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Typical Application *click for larger image	Block Diagram *click for larger image
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Datasheets

Title		Size	Date	Other Language
	LP5522 Programmable LED Driver	255 Kbytes	13-Jun-07

Featured Application Notes

Title		Size	Date	Other Language
	AN-1636: AN-1636 LP5522 Evaluation Kit	1568 Kbytes	13-Jun-07	中文

More Application Notes

Title		Size	Date	Other Language
	AN-1632: AN-1632 LP5521TM Evaluation Kit	2062 Kbytes	16-Jan-09
	AN-1502: AN-1502 LP5526 Evaluation Kit	2362 Kbytes	12-Mar-07
	AN-1702: AN-1702 LP5524 Evaluation Kit	491 Kbytes	17-Mar-08
	AN-1523: AN-1523 LP5521 Power Efficiency Considerations	5526 Kbytes	17-Apr-08	中文
	AN-1562: AN-1562 LP5521 Programming Considerations	761 Kbytes	17-Apr-08
	AN-1442: Application Note 1442 Design and Programming Examples for Lighting Management Unit LP5526	749 Kbytes	26-Jan-07	中文

Part Number(s) (NSID)	Top View	Availability	Current Reported Stock	Budgetary Pricing	Standard Pack Size
LP5522TM/NOPB RoHS Status		Full production Lead Time: 16 weeks	Distributor Region Qty DIGIKEY Worldwide 636 NEWARK Americas 750 RS COMPONENTS Worldwide 110	$0.45 each at 1K+ pcs	reel of 250
LP5522TMX/NOPB RoHS Status		Full production Lead Time: 16 weeks	Distributor Region Qty DIGIKEY Worldwide 0	$0.45 each at 1K+ pcs	reel of 3000

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/packaging/leadfree.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/quality/green.

National's certificate of product compliance is located at RoHS Status.

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/packaging/leadfree.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/quality/green.

National's certificate of product compliance is located at RoHS Status.

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