led照明的协同电路保护

　　led照明的协同电路保护

　　LED热管理对于正确的色彩再现和安全操作至关重要。虽然设计者非常重视电源管理来控制过热，但不要忽视过电压和过电流保护。

　　随着政府机构、行业和消费者寻找降低能源成本的途径，照明技术已成为人们关注的主要领域。近年来，发光二极管（LED）技术在价格、性能和可制造性方面取得了令人瞩目的成就，而优化LED操作的进一步改进有望推动照明市场的指数增长。

　　然而，尽管这项技术越来越受欢迎，但LED制造商仍在继续努力：如果没有足够的热量管理，热量会降低LED的寿命，影响彩色输出。此外，由于LED驱动器是硅器件，它们可能会短时间失效。这意味着可能需要故障保护，后备过电流保护。

　　LED technology has advanced rapidly， with improved chip designs and materials facilitating the development of brighter and longer-lasting light sources that can be used in a wide spectrum of applications. Nevertheless， LED luminaires require precise power and heat-management systems， since most of the electrical energy supplied to an LED is converted to heat rather than light.

　　Resettable polymeric positive temperature coefficient （PPTC） devices have demonstrated their effectiveness in a variety of LED lighting applications. Like traditional fuses， they limit current after specified limits are exceeded. However， unlike fuses， PPTC devices have the ability to reset after the fault is cleared and the power is cycled.

　　A variety of overvoltage protection devices including metal oxide varistors （MOVs）， electrostatic discharge （ESD） surge protection devices， and polymer-enhanced Zener diodes can be used in a coordinated scheme with PPTC devices to help improve LED performance and reliability.