Multi-MHz LED Drivers: Design for Lifetime and Reliability

Conference: PCIM Europe 2018 - International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management
06/05/2018 - 06/07/2018 at Nürnberg, Deutschland

Proceedings: PCIM Europe 2018

Pages: 7Language: englishTyp: PDF

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Pittini, Riccardo; Andersen, Thomas; Andersen, Toke M.; Rodgaard, Martin; Monster, Jakob; Madsen, Mickey (Nordic Power Converters, Denmark)

LED power supply lifetime is often the limiting factor for LED luminaries. This paper presents the design of a 60W electrolytic-free outdoor LED driver operating at multi-MHz switching frequencies which allow minimizing passive components. Lifetime and reliability predictions based on both mathematical models and manufacturer data are integrated into the design process in order to achieve a lifetime above 120000 hours. Results highlight how high switching frequencies can help to increase the power supply lifespan and reliability. Moreover, size reductions of more than 50% are achievable based on comparable commercial LED drivers.