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LP3936  Product Folder

Lighting Management System for Six White LEDs and One RGB or FLASH LED
Generic P/N 3936
General
Description		 Features Datasheet Package
& Models		 Samples
& Pricing		 Reliability
Metrics

Parametric Table Parametric Table
Temperature Min (deg C) -40 
Temperature Max (deg C) 85 
Total LED Current (mA) 250 
LED Configuration Parallel 
Regulated LEDs () 6 
Current Matching .5% 
Boost Type Inductive 
Boost Voltage Regulated 
Efficiency (%) 90 
Supply Current (mA) 1 
Switching Frequency (Hz) 1000000 
Switching Type PWM 
InputMin Voltage (Volt) 3 
InputMax Voltage (Volt) 6 
OutputMax Voltage (Volt) 5.30 
PWM BrightCtrl Yes 
Analog-V BrightCtrl No 
AmbientLight Compensation Yes 
RGB-LED Yes 

Datasheet

TitleSize in KbytesDate
View Online
Download
Receive via Email
LP3936 Lighting Management System for Six White LEDs and One RGB or FLASH LED 513 Kbytes 6-Nov-03 View Online Download Receive via Email

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

Package Availability, Models, Samples & Pricing

Part NumberPackageStatusModelsSamples &
Electronic
Orders		Budgetary PricingStd
Pack
Size		Package
Marking
TypePinsMSL/Lead-Free AvailabilityLead
Time		QtySPICEIBISQty$US each
LP3936SLLaminate TCSP32StatusFull productionN/AN/ASamples1K+$2.00reel
of
1000		NSUZXYTT
LP3936SL
10-11 weeks10000
LP3936SLXLaminate TCSP32StatusFull productionN/AN/A 1K+$2.00reel
of
2500		NSUZXYTT
LP3936SL
10-11 weeks10000

General 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.

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 CSP laminate package

Applications

  • Cellular Phones
  • PDAs

Reliability Metrics

Part Number Process Early Failure Rate - Rejects Sample Size (EFR) PPM * Rel. Rejects Device Hours Long Term Failure Rates (FITS) MTTF
LP3936SLCMOS721420014108000005226190940
LP3936SLXCMOS721420014108000005226190940

For more information on Reliablitity Metrics, please click here.


[Information as of 15-Jan-2004]

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