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Low-Cost, Linear-Regulator LCD Panel Power Supplies

Linear-Regulator, TFT-LCD Power-Supply Controllers

Product Details

Key Features

Simplified Block Diagram

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Key Features

  • High-Performance Linear Regulator
    • 1.6% Output Accuracy
    • Works with Small Ceramic Output Capacitors
    • Fast Transient Response
    • Foldback Current Limit
  • 50mA Negative Regulated Charge Pump
  • 20mA Positive Regulated Charge Pump with Adjustable Delay
  • Built-In Power-Up Sequence
  • High-Current Operational Amplifier (MAX8710/MAX8711)
    • ±150mA Output Short-Circuit Current
    • 12V/µs Slew Rate
    • 12MHz, -3dB Bandwidth
    • Rail-to-Rail Inputs/Output
  • Dual Mode™ High-Voltage Switches (MAX8710)
  • Thermal Protection
  • Latched Fault Protection with Timer

Applications/Uses

  • LCD Monitor Panel Modules
  • LCD TV Panel Modules

Description

The MAX8710/MAX8711/MAX8712 offer complete linear-regulator power-supply solutions for thin-film transistor (TFT) liquid-crystal-display (LCD) panels used in LCD monitors and LCD TVs. All three devices include a high-performance AVDD linear regulator, a positive charge-pump regulator, a negative charge-pump regulator, and built-in power-up sequence control. The MAX8710 and MAX8711 also include a high-current operational amplifier. Additionally, the MAX8710 provides logic-controlled high-voltage switches to control the positive charge-pump output.

The linear regulator directly steps down the input voltage to generate the supply voltage for the source-driver ICs (AVDD). The two built-in charge-pump regulators are used to generate the TFT gate-on and gate-off supplies. The high-current operational amplifier is typically used to drive the LCD backplane (VCOM) and features high output current (150mA), fast slew rate (12V/µs), and wide bandwidth (12MHz). Its rail-to-rail inputs and output maximize flexibility.

The MAX8710 is available in a 24-pin thin QFN package, the MAX8711 is available in a 16-pin thin QFN package, and the MAX8712 is available in a 12-pin thin QFN package. All three packages are 4mm x 4mm with a maximum thickness of 0.8mm for ultra-thin LCD panel design. They operate over the -40°C to +100°C temperature range.

Simplified Block Diagram

MAX8710, MAX8761: Pin Configuration MAX8710, MAX8761: Pin Configuration Zoom icon

Technical Docs

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 .