EC9219 Datasheet, PDF (1/14 Pages) E-CMOS Corporation – TFT- LCD DC-DC Converters with Operational Amplifiers

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. The devices feature high output current (±150mA), fast slew rate
(17V/μs), wide bandwidth (12MHz), and rail-to-rail inputs and outputs
The EC9219 are available in 14- pin thin TSOP packages with a maximum thickness of 1mm for ultra-thin LCD
panels.
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
Applications
z Notebook Computer Displays ,
z LCD Monitor Panels ,
z Automotive Displays
Ordering information
PART NO
EC9219I-G
EC9219G-G
MARKING
EC9219-G
EC9219G
PACKAGE
TSSOP14 Green Package
TQFN16 Green Package
P 1 / 14
2009/09/29