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MAX1664 - Active-Matrix Liquid Crystal Display AMLCD Supply

Description

The MAX1664 integrates power-supply and backplane drive circuitry for active-matrix thin-film-transistor (TFT) liquid crystal displays.

Features

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

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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19-1356; Rev 0; 4/98 Active-Matrix Liquid Crystal Display (AMLCD) Supply ________________General 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, pulsewidth-modulation boost converter (0.25 Ω 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 phaselocked operation allow the use of small, minimumheight 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.
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