Powering LED luminaires: is EMC mitigation or prevention the best option?

November 19, 2012 //By Arnoldas Bagdonas
Compromises and work-arounds undertaken in an effort to meet the requirements of electro-magnetic compatibility (EMC) have had the potential in the past to markedly impair the reliability and efficiency, and increase the total production cost, of the power circuit in an LED luminaire.

A typical example of a power circuit for an LED luminaire using conventional power components is shown in figure 1. Excessive radiated emissions will normally lead the design team to shield the entire housing. In practice, however, this increases the parasitic capacity between the (now larger) conductive area – that is, the chassis plus its shield – and the reference ground of any EMC measurement equipment.

Read the full article on page 46 of our November digital edition.