Features Three independent program execution engines for user defined programs with large SRAM memory for storing lighting programs 9 programmable source (high side) driver outputs with 25.5 mA full-scale current, 8-bit current setting resolution and 12-bit PWM control resolution Flexible grouping possibility for all 9 outputs including GPO into three groups with group PWM and Fade in/ Fade out controls Built-in LED test Adaptive charge pump with 1x and 1.5x gain provides up to 95% LED drive efficiency and with soft start and overcurrent/short circuit protection Automatic power save mode; IVDD = 10 µA (typ.) Two wire, I 2C-compatible, control interface Small application circuit Pin-configured LED powering for LEDs 1 to 6 and for LEDs 7 to 9 Solution area <18 mm 2 Description The LP8501 is a LED driver with 9 outputs, designed to produce versatile lighting effects for mobile devices. The device is equipped with an internal program memory, which allows operation without processor control. Internal program memory is used by three independent program execution engines to produce user defined lighting effects for the outputs. A high-efficiency charge pump enables LED driving over full Li-Ion battery voltage range. The excellent efficiency over a wide operating range is achieved by autonomously selecting the best charge pump gain based on LED forward voltage requirements. LP8501 is able to automatically enter power-save mode when LED outputs are not active, thus lowering idle current consumption down to 10 µA (typ.) The device has a flexible General Purpose Output (GPO), which can be used for example as a digital control pin for other devices. INT pin (interrupt function), which can be used to notify processor. Trigger input interface, which allows program execution start without I 2C write. The device requires only four small and low-cost ceramic capacitors. The LP8501 is available in a tiny 25–bump 2.27 mm x 2.27 mm x 0.60 mm micro SMD package (0.4 mm pitch). Notice: This document is not a full datasheet. For more information regarding this product or to order samples, please contact your local National Semiconductor sales office or visit http://www.national.com/support/dir.html Applications Fun lights and indicator lights LED backlighting and color keypad lighting Programmable current source Haptic feedback driver and GPIO expander

typ application circuit

Typical Application click for larger image typ application circuit

Datasheets

Title		Size	Date	Other Language
	LP8501 Multi-Purpose 9-Output LED Driver	116 Kbytes	20-Nov-08

Part Number(s) (NSID)	Top View	Availability	Current Reported Stock	Budgetary Pricing	Pack Size
LP8501TME/NOPB RoHS Status	MICRO SMD	Full production Lead Time: 6 weeks	Distributor Region Qty DIGI-KEY Worldwide 659 FARNELL Europe and Asia 190 MOUSER Worldwide 500 NEWARK Americas 190	$0.90 each at 1K+ pcs	reel of 250
LP8501TMX/NOPB RoHS Status	MICRO SMD	Full production Lead Time: 6 weeks	Distributor Region Qty CEAC Asia Pacific 18000 DIGI-KEY Worldwide 0	$0.90 each at 1K+ pcs	reel of 3000

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

Moisture Sensitivity Level Data for LP8501.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

National's certificate of product compliance for LP8501 is located at RoHS Status.

Part Number(s) (NSID)	Weight (milligrams)	Type	Pins	MSL Rating	Peak Reflow	RoHS Status	CAD Symbols	Models	Package Marking Format
LP8501TME/NOPB	6.528	MICRO SMD	25	1	260	Detail	N/A	N/A	XYTT I 8501
LP8501TMX/NOPB	6.528	MICRO SMD	25	1	260	Detail	N/A	N/A	XYTT I 8501

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

Moisture Sensitivity Level Data for LP8501.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

National's certificate of product compliance for LP8501 is located at RoHS Status.

CAD Symbols and Models N/A

Models N/A

Reliability Metrics

Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
LP8501TME	CMOS7	0	21301	0	0	1584000	3	449464325
LP8501TMX	CMOS7	0	21301	0	0	1584000	3	449464325

Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR. The Long Term Failure Rates were calculated at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress temperature of 150°C to an application temperature of 55°C.

For more information on Reliability Metrics, please click here.

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

Moisture Sensitivity Level Data for LP8501.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

National's certificate of product compliance for LP8501 is located at RoHS Status.