A study to improve the performance of an automotive LED current sense amplifier

Although they're not a novelty, LEDs have become the standard for automotive lighting just in the last few years. In order to get a consistent lighting these devices need to be driven with a constant current, and in order to do so, an LED driver is used. The accuracy and precision of LED drivers depend on the current measurement that closes the feedback loop and ensures the correct functioning of the system. Process variation and environmental conditions might affect the measurement, and therefore ruin the driver performance. The scope of this thesis is to assess methods that can be viably used in order to improve performances, increase yield and possibly keep the production costs the same. Thanks to Infineon, typical design steps are accompanied by laboratory testing in order to validate and troubleshoot various hypothesis on how to improve the current sensing performances.