HX8609A
240 Channel TFT Gate Driver with Internal Power IC
HX8609A
240 Channel TFT Gate Driver
with Internal Power IC
April 2003, Version 1.0
1. General Description
HX8609A is a gate-driver IC for using in systems with color-TFT-liquid-crystal dot-matrix graphic
displays. It incorporates a circuit for driving 240 channels of TFT gate-line driving and all the
power-supply circuits that are required for liquid crystal displays, and realizes the liquid crystal display by
adding external capacitors.
When used with the HX8302A 396-channel source driver with internal RAM, and used with the
HX8301A 528-channel source driver with internal RAM, this LSI is suitable for color TFT displays of
cellular phones having 132-by-176 and 176-by-240 pixels, respectively. The LSI has functions such as
instruction setting from source driver, internal step-up circuit, op-amp circuit, micro-adjustment of power
output etc., and is suitable for midium-small potable machine such as mobile phone, small-size PDAs.
2.
Features
鈥?/div>
TFT gate-line driving circuits
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240 outputs
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The driving timing suitable for configuration of TFT structure in display
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Cst structure (Cs-on-common TFT structure)
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2 Vcom output voltages : Vcom and Vcom2 which is alternating between VcomL , VcomH and
VcomL2 , VcomH2.
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Alternating driving for TFT-display common-electrode power supply
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N-line alternating drive of Vcom
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Adjustment of Vcom amplitude
:
internal 22-level digital potentiometer.
錚?/div>
Adjustment of Vcom high voltage : internal 30-level digital potentiometer / externally adjusted by
variable resistor.
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The instruction transfer for mode setting
錚?/div>
Serial transfer from the HX8301A/8302A source driver
鈥?/div>
Low-power consumption operation
錚?/div>
Controlling function for the switching performance of step-up circuits and operational amplifiers
鈥?/div>
Input power-supply voltage
錚?/div>
Vcc 鈥?GND = 1.8 ~ 3.3 V (Power supply for logic circuit)
錚?/div>
Vci 鈥?GND = 2.5 ~ 3.3 V (Power supply for analog circuit)
Version 1.0
Himax
Technologies, Inc.
1
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