Pairing a polymeric positive temperature coefficient device with a metal-oxide varistor provides a completely resettable and coordinated circuit protection solution for AC LED lighting systems
By David Neal, Barry Brents, Matt Williams and Faraz Hasan
In recent years, light-emitting diode (LED) technology has made impressive gains in price, performance and manufacturability. Further improvements that optimise LED operation are expected to drive exponential growth in the LED lighting market. One of the most recent commercial developments is a family of high-voltage LEDs (AC LEDs) that can operate directly off line voltage without the need for an AC-DC converter.