Features High Efficiency 250 mA Magnetic Boost DC-DC Converter with Programmable Output Voltage PWM controlled RGB LED drivers with programmable color, brightness, turn on/off slopes and blinking FLASH function with 3 drivers, each up to 120 mA current 4 constant current White LED drivers with programmable 8-bit adjustment (0 ... 25 mA/LED) 2 constant current White LED drivers with programmable 8-bit adjustment (0 ... 25 mA/LED) 8-bit ADC for ambient light sensor with averaging Combined MicroWire/SPI and I2C compatible serial interface Low current Standby mode (software controlled) Low voltage digital interface down to 1.8V Space efficient 32-pin thin CSP laminate package Description LP3936 is a complete lighting management system designed for portable wireless applications. It contains a boost DC/DC converter, 4 white LED drivers to drive the main LCD panel backlight, 2 white LED drivers for sub-LCD panel and 1 set of RGB LED drivers. Both WLED groups have 8-bit programmable constant current drivers that are separately adjustable and matched to 1% (typ.). For efficient backlighting the backlight intensity can be adjusted using the 8-bit ADC with ambient light detection circuit. The RGB LED drivers are PWM-driven with programmable color, intensity and blinking patterns. In addition, they feature a FLASH function to support picture taking with camera-enabled cellular phones. An efficient magnetic boost converter provides the required bias operating from a single Li-Ion battery. The DC/DC converter output voltage is user programmable for adapting to different LED types and for efficiency optimization. All functions are software controllable through an I2C and MicroWire/SPI compatible interface and 16 internal registers. Applications Cellular Phones PDAs

Typical Application click for larger image	Block Diagram click for larger image
Typical Performance click for larger image

Datasheets

Title		Size	Date	Other Language
	LP3936 Lighting Management System for Six White LEDs and One RGB or FLASH LED	903 Kbytes	15-Jun-05

Application Notes

Title		Size	Date	Other Language
	AN-1293: Application Note 1293 Driving RGB LED Using LP3936 Lighting Management System	148 Kbytes	25-Mar-04	中文

Part Number(s) (NSID)	Top View	Availability	Current Reported Stock	Budgetary Pricing	Pack Size
LP3936SL/NOPB LP3936SL RoHS Status	LAMINATE TCSP	Full production Lead Time: 6 weeks	Distributor Region Qty DIGI-KEY Worldwide 1995	$1.91 each at 1K+ pcs	reel of 1000
LP3936SLX/NOPB LP3936SLX RoHS Status	LAMINATE TCSP	Full production Lead Time: 6 weeks	Distributor Region Qty DIGI-KEY Worldwide 0	$1.91 each at 1K+ pcs	reel of 2500

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 LP3936.

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 LP3936 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
LP3936SL/NOPB LP3936SL	46.323 46.323	LAMINATE TCSP	32	3 3	260 260	Detail	N/A	N/A	NSUZXYTTE# LP3936SL
LP3936SLX/NOPB LP3936SLX	46.323 46.323	LAMINATE TCSP	32	3 3	260 260	Detail	N/A	N/A	NSUZXYTTE# LP3936SL

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 LP3936.

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 LP3936 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)
LP3936SL	CMOS7	0	21301	0	0	1584000	3	449464325
LP3936SLX	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 LP3936.

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 LP3936 is located at RoHS Status.