Product category: Power Supply ICs and Controllers
News Release from: Maxim Integrated Products | Subject: MAX1513 are MAX1514
Edited by the Electronicstalk Editorial Team on 04 November 2003
All-in solution powers up TFT LCDs
The MAX1513 are MAX1514 are complete power-supply solutions for active-matrix thin-film transistor liquid-crystal displays.
The MAX1513 are MAX1514 are 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
This article was originally published on Electronicstalk on 27 Aug 2002 at 8.00am (UK)
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The MAX1513 includes an additional linear-regulator controller and a high-performance buffer amplifier.
These controllers operate from a 2.7 to 5.5V input supply 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 use of ultrasmall inductors and ceramic capacitors while achieving efficiencies over 85% using lossless current sensing.
The internal soft-start effectively limits the input-surge current during startup.
The MAX1513 and MAX1514 gate-on and gate-off linear-regulator controllers 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 creates a low-voltage logic supply.
The gamma linear-regulator controller of the MAX1513 can generate a gamma-correction reference supply or a general-purpose supply rail.
The MAX1513's high-performance buffer amplifier can drive the VCOM or the gamma-correction divider string.
This amplifier features high short-circuit current (+/-150mA), high slew rate (10V/us), wide bandwidth (12MHz), and rail-to-rail inputs and outputs.
The MAX1513 and MAX1514 are available in 4 x 4mm, 20-pin TQFN packages with a maximum thickness of 0.8mm suitable for ultrathin LCD-panel design.
Prices start at $3.90 for the MAX1513 and $3.60 for the MAX1514 (1000-up, FOB USA).
An evaluation kit with recommended external components is available to speed designs.
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