Product category: Power Supply ICs and Controllers
News Release from: Maxim Integrated Products | Subject: MAX8739
Edited by the Electronicstalk Editorial Team on 29 April 2005
Slimline regulator powers up TFT panels
The MAX8739 is a high-performance step-up regulator with two high-current op amps for active-matrix thin-film transistor liquid crystal displays in notebook and automotive applications.
The MAX8739 is a high-performance step-up regulator with two high-current operational amplifiers for active-matrix, thin-film transistor liquid crystal displays in notebook and automotive applications The device has a 1.8 to 5.5V input supply voltage and includes a logic-controlled, high-voltage switch with adjustable delay
This article was originally published on Electronicstalk on 27 Aug 2002 at 8.00am (UK)
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The step-up DC/DC convertor provides the regulated supply voltage for the panel source-driver ICs and has been designed to work down to input voltages as low as 1.8V with high efficiency.
The convertor is a high-frequency (600kHz/1.2MHz) current-mode regulator with an integrated 14V N-channel MOSFET that allows use of ultrasmall inductors and ceramic capacitors.
It provides fast transient response to pulsed loads while achieving efficiencies over 85%.
The two high-performance operational amplifiers drive the LCD backplane (VCOM) and/or the gamma-correction-divider string.
The MAX8739 convertor features high output current (+/-150mA), fast slew rate (7.5V/us), wide bandwidth (12MHz), and rail-to-rail inputs and outputs.
The MAX8739 is available in a 5 x 5mm, 20-pin thin QFN package with a 0.8mm maximum thickness for ultrathin LCD panels.
Prices start at $3.55 (1000-up, FOB USA).
A pre-assembled MAX8739 evaluation kit with recommended external components is available to reduce design time.
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