Abstract: A direct drive LED lighting circuit includes a LED current control circuit with a power switching device; a current sensing device, an averaging circuit, and an error amplifier. A LED chain circuit is formed by connecting several LEDs in series with a capacitor connecting in parallel with the series of LEDs, with a current flowing in side as a positive terminal, and a current leaving terminal as a negative terminal. The LED chain circuit and the LED current control circuit are connecting in series and the whole circuit is connected between the positive and negative terminals of a rectified AC power source.
Type:
Grant
Filed:
June 10, 2015
Date of Patent:
January 22, 2019
Assignee:
Mosway Semiconductor Ltd.
Inventors:
Chiu Sing Celement Tse, On Bon Peter Chan, Chi Keung Tang