Abstract

For the primary-side-regulation (PSR) single-stage flyback LED driver operating in critical conduction mode (CRM), the input line current is notably distorted around the zero-crossing of the line voltage, especially in the conditions of high input voltage and light load. This paper derives the expression of the line current, and the reason of line current zero-crossing distortion (LCZCD) is investigated. After that, a simple method to reduce LCZCD is proposed by duty cycle limitation (DCL). The driving integrated circuits (ICs) with and without DCL are fabricated and the experimental results from LED drivers verify the effectiveness of the proposed method.

Talk to us

Join us for a 30 min session where you can share your feedback and ask us any queries you have

Schedule a call

Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.