ADJD-J823

www.DataSheet4U.com ADJD-J823 Color Management Controller with Integrated RGB Photosensor Data Sheet Description The ADJD-J823 is a CMOS mixed-signal IC with integrated RGB photosensors designed to be the optical feedback device of an RGB LED-based backlighting system. A typical system consists of an array of red, green and blue (RGB) LEDs, LED drivers and the ADJD-J823. The device samples the light output from the RGB LED array, processes the color information and adjusts the light output from the RGB LEDs until the target color is achieved. To achieve this, the device integrates an RGB photosensor array, an analog-to-digital converter front-end, a color data processing logic core and a high-resolution 12-bit PWM output generator. By employing a feedback system and the ADJD-J823, the light output produced by the LED array maintains its color over time and temperature. In addition, using a serial interface, specifying the color of the LED array’s light output is as simple as picking the target color coordinates from the CIE color space and writing several bytes of data to the device. The sensitivity of the device to light can be adjusted through an automated process. The PWM output signals control the on-time duration of the red, green and blue LEDs. That duration is continually adjusted in real-time to match the light output from the RGB LED array to the target color. Features Integrated RGB photosensor Integrated color management feedback controller Serial Int...