Koninklijke Philips Corporation N.v.

Raghuram Narasimhan

Bernd Clauberg

Ajay Tripathi

Young-Kee Min

Rohit Khetarpal

The power supply () for LEDs provides power to a LED light source () having a variable number of LEDs wired in series and/or in parallel. The power supply () uses current and voltage feedback to adjust power to the LEDs and provides protection to the LED light source (). A feedback controller () compares sensed current and sensed voltage to a reference signal and generates a feedback signal, which is processed by a power factor corrector () to adjust the current flow through the transformer supplying current to the LEDs. A LED control switch () clamps a peak of the current to the LEDs to provide further protection to the LED light source (). A short/open detection circuit () indicates any detection of a 'LED outage' of the LED light source ().

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Lubbock, TX, United States of America

Raghuram Narasimhan