Constant Current Paralleling Controller for Mid-Power LED
Conference: PCIM Europe 2017 - International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management
05/16/2017 - 05/18/2017 at Nürnberg, Deutschland
Proceedings: PCIM Europe 2017
Pages: 8Language: englishTyp: PDF
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Authors:
Heidinger, Michael; Simon, Christoph; Denk, Fabian; Heering, Wolfgang; Kling, Rainer (Karlsruhe Institute of Technology (KIT), Germany)
Abstract:
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.