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EC9219 - TFT-LCD DC-DC Converters

General Description

The EC9219 include a high-performance step-up regulator, and high-current operational amplifiers for active-matrix thin-film transistor (TFT) liquid-crystal displays (LCDs).

The step-up DC-DC converter provides the regulated supply voltage for the panel source driver ICs.

Key Features

  • z 2.6V to 5.5V Input Supply Range z 1.2MHz or 640KHZ Current-Mode Step-Up Regulator z Fast Transient Response to Pulsed Load z High-Accuracy Output Voltage ( 2% ) z Built-In 18V, 1.6A, 0.16Ω N-Channel MOSFET z High Efficiency (90%) z High-Performance Operational Amplifiers z 17V/μs Slew Rate z 12MHz, -3dB Bandwidth z Rail-to-Rail Inputs/Outputs z Thermal-Overload Protection.

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Datasheet Details

Part number EC9219
Manufacturer E-CMOS
File Size 371.83 KB
Description TFT-LCD DC-DC Converters
Datasheet download datasheet EC9219 Datasheet

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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TFT- LCD DC-DC Converters with Operational Amplifiers EC9219 General Description The EC9219 include a high-performance step-up regulator, and high-current operational amplifiers for active-matrix thin-film transistor (TFT) liquid-crystal displays (LCDs). The step-up DC-DC converter provides the regulated supply voltage for the panel source driver ICs. The converter is a high-frequency (1.2MHz or 640KHZ) current-mode regulator with an integrated 18V n-channel MOSFET that allows the use of ultra-small inductors and ceramic capacitors. It provides fast transient response to pulsed loads while achieving efficiencies over 85%. The EC9219 includes one operational amplifier. These amplifiers are designed to drive the LCD backplane (VCOM) and/or the gamma-correction divider string.