The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 11, 2014
Filed:
Dec. 27, 2012
Chia-wei Liao, Zhubei, TW;
Leng-nien Hsiu, Zhubei, TW;
Pei-yuan Chen, Taoyuan, TW;
Roland Van Roy, Eindhoven, NL;
Jing-meng Liu, Zhubei, TW;
Chia-Wei Liao, Zhubei, TW;
Leng-Nien Hsiu, Zhubei, TW;
Pei-Yuan Chen, Taoyuan, TW;
Roland Van Roy, Eindhoven, NL;
Jing-Meng Liu, Zhubei, TW;
Richtek Technology Corporation, Chupei, Hsin-Chu, TW;
Abstract
The present invention discloses an active bleeder circuit capable of triggering a tri-electrode AC switch (TRIAC) circuit in all phase. The active bleeder circuit receives a rectified signal having an OFF phase and an ON phase. The active bleeder includes: a detection circuit for generating a detection signal according to the rectified signal and accumulating the detection signal in the OFF phase of the rectified signal; and a current sinker circuit coupled to the detection circuit, for generates a latching current to trigger the TRIAC circuit by operating a switch when the detection signal exceeds a predetermined level. The present invention also discloses a light emitting device power supply circuit and a TRIAC control method using the active bleeder circuit.