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MAX8795AEVKIT

MAX8795A Evaluation Kit

Product Details

Key Features

Simplified Block Diagram

Technical Docs

Data Sheet MAX8795A Evaluation Kit Jun 11, 2007

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Key Features

  • +4.5V to +5.5V Input Range
  • Output Voltages
    • +14V, 500mA (VMAIN)
    • +25V, 20mA (VPOS)
    • -10V, 50mA (VNEG)
  • Adjustable Output Voltages (External Resistors)
  • 1.2MHz Switching Frequency
  • Five High-Performance Op Amps
    • 130mA (Typ) Short-Circuit Current (Buffers)
  • Low-Profile Surface-Mount Components
  • Fully Assembled and Tested

Applications/Uses

  • Automotive Displays
  • LCD Monitor Panels
  • Notebook Computer Displays

Description

The MAX8795A evaluation kit (EV kit) is a fully assembled and tested surface-mount printed-circuit board (PCB) that contains a step-up switching regulator, a positive charge pump postregulated by a high-voltage linear regulator, a negative charge pump postregulated by a high-voltage negative linear regulator, and five high-current operational amplifiers (op amps). The primary step-up converter is configured for a +14V output (VMAIN) and provides at least 500mA from a +4.5VDC supply voltage.

The positive and negative linear-regulator controllers postregulate the charge-pump outputs for TFT gate-on and gate-off supplies. The positive linear regulator is set to +25V output (VPOS) and provides at least 20mA. The negative linear regulator is set to -10V output (VNEG) and provides at least 50mA. Power to the positive charge-pump input comes from the step-up switching-regulator output, while power to the negative charge-pump input comes from the power ground.

The EV kit also features five high-performance op amps designed to drive the LCD backplane (VCOM). Power to the VCOM buffers comes from the step-up switching regulator output. The MAX8795A EV kit demonstrates low quiescent current and high efficiency for maximum battery life. High-frequency (1.2MHz) operation allows the use of tiny surface-mount components to minimize the thickness of LCD panel designs.

Simplified Block Diagram

Technical Docs

Data Sheet MAX8795A Evaluation Kit Jun 11, 2007

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .