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MAX1664
Active Matrix Liquid Crystal Display (AMLCD) Supply

Low-Noise, Integrated Solution Powers Active-Matrix TFT LCD Displays


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Status
Active: In Production.

Data Sheet
FULL DATA SHEET (PDF, 264kB)
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Description
The MAX1664 integrates power-supply and backplane drive circuitry for active-matrix thin-film-transistor (TFT) liquid crystal displays. Included are a single-output, pulse-width-modulation boost converter (0.25Ω switch), a dual-output (positive and negative) gate-driver supply using one inductor, an LCD backplane driver, and a simple phase-locked loop to synchronize all three outputs.

High switching frequency (1MHz nominal) and phase-locked operation allow the use of small, minimum-height external components while maintaining low output noise. A +2.8V to +5.5V input voltage range allows operation with any logic supply. Output voltages are adjustable to +5.5V (DC-DC 1) and to +28V and-10V (DC-DC 2). The negative output voltage can be adjusted to -20V with additional components. Also included are a logic-level shutdown and a "Ready" output (RDY) that signals when all three outputs are in regulation.

The boost-converter operating frequency can be set at 16, 24, or 32 times the backplane clock. This flexibility allows a high DC-DC converter frequency to be used with LCD backplane clock rates ranging from 20kHz to 72kHz. The MAX1664 is supplied in a 1.1mm-high TSSOP package.

Key Features   Applications/Uses
  • Integrates All Active Circuitry for Three DC-DC Converters
  • Ultra-Small External Components (ceramic capacitors, 2µH to 5µH inductors)
  • DC-DC Converters Phase-Locked to Backplane Frequency for Lowest Noise
  • Low Operating Voltage (down to +2.8V)
  • Adjustable Output Voltage from VIN to +5.5V
  • Load Currents Up to 500mA
  • Adjustable TFT Gate Driver Output:
    • Positive, VIN to +28V
    • Negative, 0 to -10V (-20V with added components)
  • Includes 0.35Ω Backplane Driver
  • 1µA Shutdown Current
  • Power-Ready Output Signal

 
  • LCD Modules
  • LCD Panels

    Diagram
    MAX1664: Typical Operating Circuit
    Typical Operating Circuit

    Reliability Reports
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    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

    MAX1664 Free
    Sample
    Buy Status
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    Temp RoHS/Lead-Free?
    Materials Analysis
    MAX1664CUP    
    Active TSSOP;20 pin;45.2 mm²
    Outline Drawing: 21-0066 (PDF)
    Land Pattern: 90-0116 (PDF)
    Use pkgcode/variation: U20-2*
    0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1664CUP-T    
    Active

    Land Pattern: Not Available

    0°C to +70°C See data sheet
    MAX1664EUP    
    Active TSSOP;20 pin;45.2 mm²
    Outline Drawing: 21-0066 (PDF)
    Land Pattern: 90-0116 (PDF)
    Use pkgcode/variation: U20-2*
    -40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX1664EUP-T    
    Active TSSOP;20 pin;45.2 mm²
    Outline Drawing: 21-0066 (PDF)
    Land Pattern: 90-0116 (PDF)
    Use pkgcode/variation: U20-2*
    -40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis

    Notes and Comments
    • PLL synchronizes all converters, simplifies noise filtering

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    Document Ref.: 19-1356; Rev 0; 1998-04-01
    This page last modified: 2007-07-20


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