完全TFT-LCD電源コントローラソリューション
SUNNYVALE, CA-October 30, 2003-Maxim Integrated Products
(NASDAQ: MXIM) introduces the MAX1513/MAX1514, a complete power-supply solution 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. These controllers operate from a 2.7V 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 ultra-small 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/MAX1514 gate-on and gate-off linear-regulator controllers provide regulated TFT gate-on and gate-off supplies. The gate-onsupply 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/ms), wide bandwidth (12MHz), and Rail-to-Rail® inputs and outputs.
The MAX1513/MAX1514 are available in a 4mm x 4mm, 20-pin TQFN package with a maximum thickness of 0.8mm suitable for ultra-thin 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.
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.
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