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LP3933  Product Folder

Lighting Management System for Six White LEDs and Two RGB or FLASH LEDs
Generic P/N 3933
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) 300 
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) 7.20 
OutputMax Voltage (Volt) 5.30 
PWM BrightCtrl Yes 
Analog-V BrightCtrl No 
AmbientLight Compensation No 
RGB-LED Yes 

Datasheet

TitleSize in KbytesDate
View Online
Download
Receive via Email
LP3933 Lighting Management System for Six White LEDs and Two RGB or FLASH LEDs 405 Kbytes 22-Dec-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
LP3933SLLaminate TCSP32StatusFull production N/AN/ASamples
Buy Now		1K+$2.10reel
of
1000		NSUZXYTT
LP3933SL
3-4 weeks200000
LP3933SLXLaminate TCSP32StatusFull production N/AN/A 
Buy Now		1K+$2.10reel
of
2500		NSUZXYTT
LP3933SL
3-4 weeks200000

General Description

The LP3933 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 the sub-LCD panel and two sets of RGB/FLASH LED drivers.

Both backlight drivers have 8-bit constant current drivers that are separately adjustable and matched to 0.5% (typ.). 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 DC/DC converter provides the required bias for LEDs, operating from a single Li-Ion battery. The DC/DC converter output voltage is user programmable from 4.1V to 5.3V for adapting to different LED types and for efficiency optimization. All functions are software controllable through a SPI interface and 19 internal registers.

Features

  • High Efficiency Programmable 300 mA Magnetic Boost DC-DC converter
  • 2 separately controlled PWM RGB LED drivers with programmable color, brightness, turn on/off slopes and blinking patterns
  • FLASH function with up to 6 outputs, each up to 120 mA
  • 4 constant current LED drivers with programmable 8-bit adjustment (0 ... 25 mA/LED)
  • 2 constant current LED drivers with programmable 8-bit adjustment (0 ... 25 mA/LED)
  • Functions software controlled through SPI interface
  • Additional LED on/off and dimming hardware control
  • Programmable low current Standby mode
  • Low voltage digital interface down to 1.8V
  • Space efficient 32-pin thin 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
LP3933SLCMOS721420014108000005226190940
LP3933SLXCMOS721420014108000005226190940

For more information on Reliablitity Metrics, please click here.


[Information as of 15-Jan-2004]

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