Series String Pixel Controller for Automotive (Front) Lighting

The NCV78343 is a single−chip pixel controller with embedded switches to control individual LEDs in a series LED string, designed for automotive dynamic lighting applications and in particular for high current LEDs. In order to create a pixel lighting solution, the LEDs need to be powered by current sources such as NCV78763 or NCV78723. The NCV78343 pixel controller devices receive the pixel control parameters from the pixel light ECU which translates the required light pattern or light image into individual pixel dimming data. One pixel controller device can control up−to 12 pixels of 1× or 2× 1.4 A LEDs per pixel. The maximum LED string voltage has to be limited to 60 V. When more than 12 pixels are to be controlled, multiple pixel controllers can be combined in a single system. The NCV78343 uses two communication interfaces for connection with a microcontroller. A universal asynchronous receiver transmitter (UART), which supports the use of CAN transceiver and multipoint low voltage differential signaling (M−LVDS) for either local connection or connection with the MCU.