More reliable, compact LED lamps

LED lamps offer a theoretical lifespan of around 50,000 hours of operation. In actual practice, however, LED lifespans are much shorter. This is due to the LEDs’ electronic driver and—in particular—the electrochemical condenser driver that transforms the high-voltage alternating current that comes off the grid into the low-voltage direct current that powers the LED.
Researchers at Leti did away with the chemical condenser—the least-reliable component of a LED—by tweaking the circuit’s architecture. They also used GaN power components to boost the switching frequency, thereby reducing the size of the passive components. Ultimately, this new breed of driver could find its way into very compact and reliable lighting solutions for especially demanding applications.

Contact: othman.ladhari@cea.fr

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