Circuito excitador para proporcionar corriente regulada a partir de una fuente de corriente alterna, que comprende un rectificador, un convertidor flyback, un regulador de corriente que comprende una pluralidad de diodos zener conectados en paralelo, y medios de retroalimentación; aparato de iluminación led.

摘要

The present application describes a driver circuit for supplying a drive current to an LED lighting scheme. In particular, the present invention relates to an AC input driver circuit operable in conjunction with a current regulator device which utilizes a plurality of Zener diodes connected in parallel combinations. The driver circuit comprises a feedback mechanism that is operable to maintain a constant voltage across the current regulator. Embodiments of the present invention seek to address LED ripple and, thus, optical flicker arising from an LED driver, connected at its input, to an AC supply.