Top

TFT-LCD Power-Supply Controllers

TFT-LCD Power-Supply Controllers Provide Complete Power-Supply Solutions for Active-Matrix Thin-Film Transistor (TFT) Liquid-Crystal Displays (LCDs)

Product Details

Key Features

Simplified Block Diagram

Technical Docs

Data Sheet TFT-LCD Power-Supply Controllers Jan 27, 2004

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.

Key Features

  • 2.7V to 5.5V Input Supply Range
  • Input-Supply Undervoltage Lockout
  • Current-Mode Step-Up Controller
    • Fast Transient Response to Pulsed Load
    • High Efficiency
    • Lossless Current Sensing
    • 430kHz/750kHz/1.5MHz Switching Frequency
  • Linear-Regulator Controllers for VGON, VGOFF
  • Linear-Regulator Controller for Logic Supply
  • High-Performance Buffer Amplifier (MAX1513 Only)
  • Additional Linear-Regulator Controller (MAX1513 Only)
  • Power-Up Sequence and VGON Delay Control
  • VMAIN, VGON, VGOFF, VGAMMA Shutdown Control
  • Timer-Delay Fault Latch for All Outputs
  • Thermal-Overload Protection

Applications/Uses

  • Automotive Displays
  • LCD Monitors and TVs
  • Notebook Computer Displays

Description

The MAX1513/MAX1514 provide complete power-supply solutions for active-matrix thin-film transistor (TFT) liquid-crystal displays (LCDs). Both devices include a high-performance step-up regulator controller, three linear- regulator controllers, and an adjustable delay block for startup sequencing. The MAX1513 includes an additional linear-regulator controller and a high-performance buffer amplifier. The MAX1513/MAX1514 can operate from 2.7V to 5.5V input supplies and provide overload protection with timer delay latch on all the regulated outputs.

The step-up regulator controller drives an external N-channel MOSFET to generate the regulated supply voltage for the panel source-driver ICs. Its current-mode control architecture provides fast transient response to pulsed loads. The high switching frequency (up to 1.5MHz) allows the use of ultra-small inductors and ceramic capacitors while achieving efficiencies over 85% using lossless current sensing. The internal soft-start limits the input surge current during startup.

The gate-on and gate-off linear-regulator controllers of the MAX1513/MAX1514 provide regulated TFT gate-on and gate-off supplies. The gate-on supply is activated after an adjustable delay following the step-up regulator. The logic linear-regulator controller can be used to create a low-voltage logic supply. The gamma linear-regulator controller of the MAX1513 can be used to generate a gamma-correction reference supply or another generalpurpose supply rail. The MAX1513's high-performance buffer amplifier can drive the LCD backplane (VCOM) or the gamma-correction divider string.

The MAX1513/MAX1514 are available in 4mm x 4mm 20-pin thin QFN packages with a maximum thickness of 0.8mm, suitable for ultra-thin LCD panel design.

Simplified Block Diagram

MAX1513, MAX1514: Pin Configuration MAX1513, MAX1514: Pin Configuration Zoom icon

Technical Docs

Data Sheet TFT-LCD Power-Supply Controllers Jan 27, 2004

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.