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MAX1610, MAX1611
Digitally Controlled CCFL Backlight Power Supplies

SMBus™ Controlled CCFL Supply Provides Bright, Flicker-Free Operation and Protects Lamps


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Data Sheet
FULL DATA SHEET (PDF, 152kB)
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Description
The MAX1610/MAX1611 are fully integrated, high-efficiency drivers for cold-cathode fluorescent lamps (CCFLs). They operate from a 4.5V to 26V power source. An on-board, high-switching-frequency power MOSFET reduces external component count and magnetics size. The MAX1610/MAX1611 protect against open or shorted lamps. The CCFL can be driven from an isolated transformer secondary winding to improve efficiency and avoid flicker at dim tube settings. Brightness is adjusted by scaling the lamp current, or by operating with a fixed lamp current and chopping the CCFL on and off at a rate faster than the eye can detect.

The MAX1610's digital inputs increment, decrement, or clear an internal, 5-bit up/down counter, which sets CCFL brightness. The MAX1611 uses a System Management Bus (SMBus) 2-wire serial interface to directly set CCFL brightness. Both devices include micropower shutdown and a linear regulator that eliminates the need for a separate logic supply. The digital interface remains active in shutdown, preserving the brightness setting.

Key Features   Applications/Uses
  • Direct Digital Control of CCFL Brightness
  • Low Supply Current:
    • 3mA Max Operating
    • 20µA Max Shutdown
  • Low-Voltage Operation, Down to 4.5V
  • Internal 26V, 0.7Ω Power Switch
  • Protection Against Open or Shorted Lamps
  • Supports Isolated Transformer Secondary Winding
  • SMBus Serial Interface (MAX1611)
  • No Flicker at Low Brightness (internal 280Hz current chopping)
  • High Power-to-Light Efficiency
  • Selectable 290kHz/145kHz Switching Frequency
  • Oscillator SYNC Input
  • 16-Pin Narrow SO Package

 
  • Instrument Displays
  • Notebook Computers
  • Point-of-Sale Terminals
  • Portable Medical Equipment

    Key Specifications:   CCFL Controllers
    Part Number Features VIN (min) (V) VIN (max) (V) Topology Number of Channels Dimming Interface Frequency EV-Kit Package Operating Temp. Range (°C)
    MAX1610 
    Synchonizable
    4.5 26 Royer Oscillator 1 Digital Up-Down Resonant Yes SOIC/16 0 to +70
    MAX1611  I2C
    SMBus
    See All CCFL Controllers (18)

    Application Notes
  • Application Note 1037: Charge-Pump and Step-Up DC-DC Converter Solutions for Powering White LEDs in Series or Parallel Connections - MAX1610

    Evaluation Kits
  • MAX1610EVKIT, MAX1611EVKIT

    Reliability Reports
  • Show FIT data for:
  • Request Reliability Report for:

    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

    MAX1610 Free
    Sample
    Buy
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    Temp RoHS/Lead-Free?
    Materials Analysis
    MAX1610CSE  
    SOIC;16 pin;
    Dwg: 21-0041 (PDF)
    Use pkgcode/variation: S16-5*
    0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1610CSE-T  
    SOIC;16 pin;
    Dwg: 21-0041 (PDF)
    Use pkgcode/variation: S16-5*
    0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1611 Free
    Sample
    Buy
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    Temp RoHS/Lead-Free?
    Materials Analysis
    MAX1611CSE  
    SOIC;16 pin;
    Dwg: 21-0041 (PDF)
    Use pkgcode/variation: S16-5*
    0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1611CSE-T  
    SOIC;16 pin;
    Dwg: 21-0041 (PDF)
    Use pkgcode/variation: S16-5*
    0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis

    Notes and Comments
  • Selectable, synchronizable switching frequency, internal 0.7 power switch

    Related Products
    MAX753, MAX754 CCFL Backlight and LCD Negative Contrast Controller
    MAX1739, MAX1839 Wide-Brightness-Range CCFL Backlight Controllers

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    Document Ref.: 19-1128; Rev 0; 1996-09-01
    This page last modified: 2007-07-17



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