The LED matrix headlight is an automotive lighting solution based on the ON LED driver NCV78763 and the pixel controller NCV78247. It drives two LED strings with configurable constant-current levels, allows the brightness of every LED pixel to be adjusted individually, and supports control over CAN, LIN and Automotive Ethernet. The solution targets intelligent automotive LED headlights that go beyond conventional lamps, enabling functions such as glare-free high beam for oncoming traffic.
Key Points
- Single-chip buck-boost solution
- Individually adjustable brightness for every LED pixel
- Integrated buck switch-mode current regulator
- LED switching and dimming with low EMC emissions
- Integrated overvoltage detection, over-temperature protection, short-circuit detection and open-circuit detection
- Suitable for automotive LED matrix headlight applications
Solution Overview
A matrix LED headlight solution built around the S32K148 as the main controller. The NCV78763 provides two constant-current outputs to drive two LED strings, while the NCV78247 handles pixel-level LED control to deliver true matrix LED lighting. The solution supports LIN, CAN and Automotive Ethernet communication.
Recommended Devices
- FS32K148UJT0VLQT
- NCV78763
- NCV78247
Core Components
- MCU main controller: FS32K148UJT0VLQT (NXP)
- Dual LED Driver: NCV78763 (ON)
- Pixel Controller: NCV78247 (ON)
- Automotive Ethernet: NXP, full part number available on request
- CAN transceiver: NXP, full part number available on request
- LIN transceiver: NXP, full part number available on request
- DC/DC: MPS, full part number available on request
- LDO: Maxlinear, full part number available on request
Applications
Primary applications, extended applications, automotive matrix headlights, automotive low beams, turn signals, cornering lights and similar lamps, automotive LED lighting related applications
Reference Design LED MATRIX HEADLIGHT
- Wide input voltage range of 9V-36V
- Stable output power up to 33W
- Drives two LED strings, up to 60V
- Integrated PWM dimming with a wide frequency range
- Supports CAN, LIN and Automotive Ethernet communication
- Complete hardware design reference materials
- Complete software design reference materials
Functional Block Diagram
