Spread-spectrum frequency modulation reduces automotive LED driver EMI

January 30, 2015 // By Keith Szolusha, Linear Technology
All of the electronic systems in an automobile must have reasonably low electromagnetic interference (EMI) in order to avoid disturbing radio reception, GPS navigation tools and other forms of communication and broadcast. Switch mode regulators are commonly used in this environment and they have to be designed to mitigate their inherently noisy nature.

This is not always easy, especially since the power and amount of electronics in a car is growing. Linear Technology's LTR3795 breaks new ground in LED driving regulators, achieving high power automotive LED driving conversion, robust short-circuit protection and reduced EMI with the use of a triangle spread spectrum frequency modulation.

See the video here .