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DS3992
Two-Channel, Push-Pull CCFL Controller

Provides Superior Lamp Current Balance Compared to Single-Channel Solutions


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Status
Active: In Production.

Data Sheet
FULL DATA SHEET (PDF, 232kB)
Download this datasheet in PDF formatDownload   Send this datasheet to any email addressE-Mail


Description
The DS3992 is a low-cost, two-channel controller for cold-cathode fluorescent lamps (CCFLs) that are used to backlight liquid crystal displays (LCDs). The DS3992 can drive multiple CCFLs per channel, making it ideal for 4- and 6-lamp LCD PC monitor and TV applications.

The DS3992 uses a push-pull drive scheme to convert 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 drive scheme uses a minimal number of external components, which reduces component and assembly cost and makes the printed circuit board (PC board) design easy to implement. The push-pull drive scheme also provides an efficient DC-to-AC conversion and produces near-sinusoidal waveforms.

Key Features   Applications/Uses
  • Two-Channel CCFL Controller for Backlighting LCD Panels for PC Monitors and LCD-TVs
  • Minimal BOM Provides Low-Cost Inverter Solution
  • Per-Channel Lamp Fault Monitoring for Lamp-Open, Lamp Overcurrent, Failure to Strike, and Overvoltage Conditions
  • Accurate (±10%) On-Board Oscillator for Lamp Frequency (40kHz to 80kHz)
  • Accurate (±10%) On-Board Oscillator for DPWM Burst-Dimming Frequency (90Hz to 220Hz or 180Hz to 440Hz)
  • Device Supply Undervoltage Lockout
  • Inverter Supply Undervoltage Lockout
  • Burst-Dimming Soft-Start Minimizes Audible Transformer Noise
  • Strike Frequency Boost
  • 100% to < 10% Dimming Range
  • 4.5V to 5.5V Single-Supply Operation
  • -40°C to +85°C Temperature Range
  • 16-Pin SO Package (150 mils)

 
  • LCD PC 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
    DS3992 
    All N-FET Drive
    Lamp Fault Output
    4.5 5.5 Push-Pull 2
    Analog
    DPWM
    Fixed PWM No
    SOIC(N)/16
    62 -40 to +85 $0.55 @1k
    See All CCFL Controllers (17)

    Diagram
    DS3992: Typical Operating Circuit
    Typical Operating Circuit

    Application Notes
  • Application Note 3375: DS3984/DS3988 Transformer Turns Ratio Selection - DS3992
  • Application Note 3835: CCFL Push-Pull Snubber Circuit - DS3992
  • Application Note 4135: Implementing Analog Dimming on the DS39xx CCFL Controllers - DS3992
  • Application Note 4190: Enhancing the Gate-Drive Capacity of the DS39xx CCFL Controllers - DS3992

    Design Guides
  • Displays (PDF)
  • Flat-Panel Display (PDF)

    Reliability Reports
  • Reliability Report: DS3992.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: 1-8 of 8

    DS3992 Free
    Sample
    Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    Temp RoHS/Lead-Free?
    Materials Analysis
    DS3992Z-09N+T&R    
    Active SOIC(N);16 pin;62 mm²
    Outline Drawing: 21-0041 (PDF)
    Land Pattern: 90-0097 (PDF)
    Use pkgcode/variation: S16+5*
    -40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    DS3992Z-09P+T&R    
    Active SOIC(N);16 pin;62 mm²
    Outline Drawing: 21-0041 (PDF)
    Land Pattern: 90-0097 (PDF)
    Use pkgcode/variation: S16+5*
    -40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    DS3992Z-18N+T&R    
    Active SOIC(N);16 pin;62 mm²
    Outline Drawing: 21-0041 (PDF)
    Land Pattern: 90-0097 (PDF)
    Use pkgcode/variation: S16+5*
    -40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    DS3992Z-18P+T&R    
    Active SOIC(N);16 pin;62 mm²
    Outline Drawing: 21-0041 (PDF)
    Land Pattern: 90-0097 (PDF)
    Use pkgcode/variation: S16+5*
    -40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    DS3992Z-09N+  
    Active SOIC(N);16 pin;62 mm²
    Outline Drawing: 21-0041 (PDF)
    Land Pattern: 90-0097 (PDF)
    Use pkgcode/variation: S16+5*
    -40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    DS3992Z-09P+  
    Active SOIC(N);16 pin;62 mm²
    Outline Drawing: 21-0041 (PDF)
    Land Pattern: 90-0097 (PDF)
    Use pkgcode/variation: S16+5*
    -40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    DS3992Z-18N+  
    Active SOIC(N);16 pin;62 mm²
    Outline Drawing: 21-0041 (PDF)
    Land Pattern: 90-0097 (PDF)
    Use pkgcode/variation: S16+5*
    -40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    DS3992Z-18P+  
    Active SOIC(N);16 pin;62 mm²
    Outline Drawing: 21-0041 (PDF)
    Land Pattern: 90-0097 (PDF)
    Use pkgcode/variation: S16+5*
    -40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis

    More Information
  • New Product Press Release 2006-12-20 
  • Product Ad: Download

    Related Products
    DS3988 8-Channel Cold-Cathode Fluorescent Lamp Controller
    DS3984 4-Channel Cold-Cathode Fluorescent Lamp Controller

    More Like This: View Product Families for Similar Products

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    2006-10-19
    This page last modified: 2007-02-22


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