4.5 Automotive LED exterior lighting design considerations
2020 Automotive TI Tech Day session
In the past couple of years, the need for higher energy efficiency, lower cost of ownership, insensitivity to vibration, long lifetime and the possibility of superior control/brighter illumination coupled with regulations are driving growth in the adoption of LED lighting in vehicles. However driving LEDs is not as simple as driving a bulb. Depending upon number of LEDs, current, diagnostics, EMI/EMC performance and functional safety needs, selection of best topology and devices is very important and will be discussed in this session.
The session will highlight key design challenges such as meeting 1-fail-all-fail, managing thermals, meeting EMI/EMC, etc, as well as address ways to best solve these design challenges. Moreover, high end vehicles also offer animated features such as turn, tail and DRL with welcome and goodbye features. This session also highlights on how LED drivers and smart high side switches from help to simplify wiring harness, connectors and reduce communication overheads in such designs.