Product category:
Power Supply ICs and Controllers
News Release from: Maxim Integrated Products | Subject: MAX8795A
Edited by the Electronicstalk Editorial
Team on 26 June 2007
Power device integrates LCD supplies
TFT-LCD DC/DC convertor combines a step-up regulator, two linear-regulator controllers, five high-current op amps and a logic-controlled high-voltage switch with adjustable delay.
New from Maxim Integrated Products, the MAX8795A TFT-LCD DC/DC convertor saves both space and cost by integrating a high-performance step-up regulator, two linear-regulator controllers, five high-current op amps and a logic-controlled, high-voltage switch with adjustable delay in a small 25mm2 footprint Designed to drive the LCD backplane (Vcom) and/or gamma-correction divider string, the high-performance operational amplifiers feature a high +/-130mA output current, fast 45V/us slew rate, wide 20MHz bandwidth, and rail-to-rail operation on the input and output
This article was originally published on Electronicstalk on 27 Aug 2002 at 8.00am (UK)
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The high integration and performance of the MAX8795A, combined with its low cost and small size, make it ideal for active-matrix, TFT-LCD TV and monitor display applications.
To further reduce solution size, the MAX8795A utilises a 1.2MHz high-frequency current-mode regulator with an integrated 20V N-channel MOSFET.
This convertor provides a regulated supply voltage for panel source drivers, and it delivers fast transient response to pulsed loads while achieving efficiencies over 85%.
Its high frequency enables the use of ultrasmall inductors and ceramic capacitors.
Additionally, the MAX8795A integrates gate-on and gate-off linear-regulator controllers that provide regulated, TFT gate-on and gate-off supplies using external charge pumps attached to the switching node.
These power supplies utilise a high-voltage-switch control matrix to improve system operation and efficiency while powering the LCD-panel row drivers.
Available in a small, 5 x 5 x 0.8mm, 32-pin TQFN package, the MAX8795A is fully specified over the -40 to +85C temperature range.
Prices start at US $3.90 (1000-up).
An evaluation kit that includes recommended external components is available to reduce design time.
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