Description
The CXA2108AQ is a 1,024-gradation LED driver which is ideal for full color LED displays. This IC has 24 outputs and a maximum output current of 70mA. Time division allows driving of either two or six LEDs per output by connecting an external FET or other switch. The luminance (PWM) and drive current for each LED are set using the internal RAM. The LED type is common anode.

Features
• 24 outputs: 10-bit (1,024-gradation) PWM current outputs
• Maximum output current: 70mA
• LED type: Common anode
• 4-bit brightness function capable of switching the basic PWM pulse width in 16 steps
• Time division allows driving of up to six LEDs with a single output, making it possible to configure a high definition display with few driver ICs.
• Coarse Adj. (2 bits) and Fine Adj. (8 bits) output current adjustment for each LED makes it possible to drive R, G and B using the same output from the same IC. In addition, the characteristics variance of each LED can also be corrected.
• All luminance (PWM) data and drive current data are set by writing to the internal RAM.
• PWM emitting can be performed up to 15 times per frame to realize a screen with little flicker.
• Two built-in PWM data RAM make it possible to set the next luminance data even during PWM operation.
• Abnormal internal temperature detection circuit
• Single 5V power supply
• Current output with protection diode (diode cathode voltage: VPD can be supplied independently of the 5V power supply.)
• Surface mounting package (80-pin QFP)

Applications
    LED display panels