ASTLC5503A - 480-CHANNELS SOURCE DRIVER WITH T-CON FOR TFT-LCDs
DESCRIPTION
The ASTLC5503A is a 480-channel source driver with timing controller for color TFT-LCD panels. The outputs have 6-bit resolution or 8-bit if the dithering technique function is selected. Gamma correction is implemented with a resistor ladder having 9 voltage sections in order to improve the output voltage deviation, while the total value of the ladder is optimised for low power consumption.
The timing controller supports 6 different data timings and is well suited for small size color TFT panels.
The ASTLC5503A contains a DC-to-DC controller that drives an external transistor to generate the backlight supply voltage of the panel. Also included is a level shifter that delivers the VCOM swing.
FEATURES
- Source driver with timing controller for small size color TFT-LCDs
- 480 (RGBx160) outputs
- 8-bit resolution, i.e. 256 gray scales with dithering
- Output dynamic range: 0.1 ~ AVDD -0.1V
- Output deviation: 20mV
- Output settling time: 10~12us
- Operating frequency: 24.54MHz
- Line inversion
- VGMA1 ~ VGMA9 for adjusting Gamma correction
- Cascade function with bidirectional shift control
- 6 timings supported
- DC to DC control circuit for backlight supply
- Level shift circuit for VCOM swing
- Stand-by mode
- Power for LCD driving: 3.0 ~ 3.6V
- Power for digital interface: 2.5 ~ 3.6V
- Power for level shift circuit: 4.0 ~ 6.0 V
- COG package
Block diagram
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