Constant Current Paralleling Controller for Mid-Power LED
Konferenz: PCIM Europe 2017 - International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management
16.05.2017 - 18.05.2017 in Nürnberg, Deutschland
Tagungsband: PCIM Europe 2017
Seiten: 8Sprache: EnglischTyp: PDF
Persönliche VDE-Mitglieder erhalten auf diesen Artikel 10% Rabatt
Autoren:
Heidinger, Michael; Simon, Christoph; Denk, Fabian; Heering, Wolfgang; Kling, Rainer (Karlsruhe Institute of Technology (KIT), Germany)
Inhalt:
A simple, cost-effective current sharing controller integrated in a LED module is presented. By this technology it is possible to drive high luminous flux, SELV-compliant LED arrays, using a large number of mid-power LEDs arranged in a series-parallel configuration. Still a conventional constant current power supply can be used. This novel current sharing concept uses one dissipative, cost-effective, balancing current sink per string, implemented by using a single operational amplifier, and one global averaging circuit. The document describes the circuit and corresponding design equations. Operation is demonstrated by measurements.