ENGLISH • 简体中文 • 日本語 • 한국어  

    Login | Register 


   
 
Enter keywords or part number    


What's New Products Solutions Design AppNotes Support Sales About Us Members

Maxim > Products > [LED Lighting and LCD Display ICs] 
DS3991
Low-Cost CCFL Controller

Full-Featured Single-Channel CCFL Controller


  QuickView     Technical Documents     Ordering Info     More Information     User Comments (0)     All  
Status
Active: In Production.

Data Sheet
FULL DATA SHEET (PDF, 484kB)
Download this datasheet in PDF formatDownload   Send this datasheet to any email addressE-Mail

Description
The DS3991 is a controller for cold-cathode fluorescent lamps (CCFLs) that are used to backlight liquid-crystal displays (LCDs). The DS3991 is available for both push-pull and half-bridge drive topologies.

The DS3991 converts a DC voltage (5V to 24V) to the high-voltage (300VRMS to 1400VRMS) AC waveform that is required to power the CCFLs. The push-pull and halfbridge drive schemes use a minimal number of external components, which reduces component and assembly cost and makes the printed circuit board (PCB) design easy to implement. Both drive schemes provide an efficient DC to AC conversion and produce near-sinusoidal waveforms.

Key Features   Applications/Uses
  • CCFL Controller for Backlighting LCD Panels
  • Minimal External Components Required
  • Lamp Fault Monitoring for Lamp-Open, Lamp-Overcurrent, Failure-to-Strike, and Overvoltage Conditions
  • Accurate (±5%) On-Board Oscillator for Lamp Frequency (40kHz to 80kHz)
  • Accurate (±5%) On-Board Oscillator for DPWM Burst-Dimming Frequency (80Hz to 300Hz)
  • Device Supply Undervoltage Lockout
  • Inverter Supply Undervoltage and Overvoltage Lockouts
  • Soft-Start on Burst-Dimming Minimizes Audible Transformer Noise
  • Strike Frequency Boost
  • 100% to < 10% Dimming Range
  • Low Cost
  • Single-Supply Operation Range: 4.5V to 5.5V
  • Temperature Range: -40°C to +85°C
  • 16-Pin SO Package (150 mils)

 
  		• LCD Monitors
  		• LCD TVs

    Key Specifications:  CCFL Controllers
    Part Number Features VIN
    (V)    		 VIN
    (V)    		 Topology Channels Dimming Interface Freq. EV Kit Package/Pins Smallest Available Pckg.
    (mm2)    		 Oper. Temp.
    (°C)    		 Price
    min max max w/pins See Notes
    DS3991  All N-FET Drive 4.5 24
    Half-Bridge
    Push-Pull
    		 1
    Analog
    DPWM
    		 Fixed PWM No
    SOIC(N)/16
    		 62 -40 to +85 $0.55 @1k
    See All CCFL Controllers (17)

    Diagram
    DS3991: Typical Operating Circuit: Typical Push-Pull Application
    Typical Operating Circuit: Typical Push-Pull Application

    Application Notes
  		• Application Note 4135: Implementing Analog Dimming on the DS39xx CCFL Controllers - DS3991
  		• Application Note 4190: Enhancing the Gate-Drive Capacity of the DS39xx CCFL Controllers - DS3991

    Design Guides
  		• Flat-Panel Display (PDF)

    Reliability Reports
  		• Reliability Report: DS3991.pdf

    Software/Models
    none

    Ordering Information
    Notes:

    1. Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
    2. Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
    3. Part number suffixes: T or T&R = tape and reel;+ = RoHS/lead-free;# = RoHS/lead-exempt. More: SeeFull Data Sheet or Part Naming Conventions.
    4. * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.


    Devices: 1-4 of 4

    DS3991 Free
    Sample    		 Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    DS3991Z+T&R/PP    
    		Active SOIC(N);16 pin;62 mm²
    Outline Drawing: 21-0041 (PDF)
    Land Pattern: 90-0097 (PDF)
    Use pkgcode/variation: S16+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    DS3991Z+T&R/HB    
    		Active SOIC(N);16 pin;62 mm²
    Outline Drawing: 21-0041 (PDF)
    Land Pattern: 90-0097 (PDF)
    Use pkgcode/variation: S16+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    DS3991Z+PP  
    		Active SOIC(N);16 pin;62 mm²
    Outline Drawing: 21-0041 (PDF)
    Land Pattern: 90-0097 (PDF)
    Use pkgcode/variation: S16+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    DS3991Z+HB  
    		Active SOIC(N);16 pin;62 mm²
    Outline Drawing: 21-0041 (PDF)
    Land Pattern: 90-0097 (PDF)
    Use pkgcode/variation: S16+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis

    More Information
  		• New Product Press Release 2008-04-02 

    Related Products

    More Like This: View Product Families for Similar Products

    Didn't Find What You Need?
  • Next Day Product Selection Assistance from Applications Engineers
  • Parametric Search
  • Applications Help

    •  QuickView   Technical Documents   Ordering Info   More Information  
     Description 
     Key Features 
     Applications/Uses 
     Key Specifications 
     Diagram 

    		 Data Sheet 
     Application Notes 
     Design Guides 
     Engineering Journals 
     Reliability Reports 
     Software/Models 
     Evaluation Kits 

    		 Price and Availability 
     Samples 
     Buy Online 
     Package Information 
     Lead-Free Information 

    		 Related Products 
     Notes and Comments 
     Evaluation Kits 

    2008-02-19
    This page last modified: 2009-07-31


            •         •         •     Privacy Policy     •     Legal Notices

        Copyright © 2009 by Maxim Integrated Products