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High-Current VCOM Drive Buffers for TFT LCDs

High Current and Fast Settling Time to Quickly Restore VCOM Voltage for TFT LCDs

Product Details

Key Features

Simplified Block Diagram

Technical Docs

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Sampling:
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Key Features

  • Operates Up to 20V
  • 800mA Peak Output Current
  • Settles to Within 0.1% of VOUT in Less than 2µs
  • Excellent Load Regulation
  • Thermal-Shutdown Protection
  • Short-Circuit Protection to Both Rails
  • Soft-Start to Reduce Inrush Current

Applications/Uses

  • Displays: LCD
  • Flat-Panel and Plasma TVs
  • Instrument Control Voltage Sources
  • TFT LCD Panels

Description

The MAX9550/MAX9551/MAX9552 provide a VCOM source for TFT LCDs. The MAX9550/MAX9551/MAX9552 source and sink a large current to quickly restore the VCOM voltage, making it ideal for TFT LCDs. The output settles to within 0.1% in less than 2µs. In addition, the MAX9550/MAX9551/MAX9552 directly drive the capacitive load in the VCOM layer of the TFT LCDs without the need for a series resistor.

The MAX9550/MAX9551/MAX9552 feature single, dual, and quad channel VCOM amplifiers, respectively. The MAX9550/MAX9551/MAX9552 can drive up to 800mA of peak current per channel and operate up to 20V. The devices feature soft-start to reduce inrush current, output short-circuit protection, and thermal shutdown.

The MAX9550 is available in a space-saving 5-pin thin SOT23 package, and an 8-pin µMAX® package with an exposed paddle. The MAX9551 is available in an 8-pin µMAX package with an exposed paddle. The MAX9552 is available in a 14-pin TSSOP package. All devices are specified over the -40°C to +85°C temperature range.

Simplified Block Diagram

MAX9550, MAX9551, MAX9552: Typical Operating Circuit MAX9550, MAX9551, MAX9552: Typical Operating Circuit 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 .

Sampling:
Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.