High-precision constant output current control for primary-side regulated flyback converters
- Resource Type
- Conference
- Authors
- Wu, Cheng-Nan; Chen, Yaow-Ming; Chen, Yang-Lin
- Source
- 2013 Twenty-Eighth Annual IEEE Applied Power Electronics Conference and Exposition (APEC) Applied Power Electronics Conference and Exposition (APEC), 2013 Twenty-Eighth Annual IEEE. :3092-3095 Mar, 2013
- Subject
- Power, Energy and Industry Applications
Components, Circuits, Devices and Systems
Communication, Networking and Broadcast Technologies
Computing and Processing
Light emitting diodes
Current measurement
Logic gates
Voltage control
Current control
Accuracy
Switches
DCM
flyback
primary-side controlled
tolerance
current correction
- Language
- ISSN
- 1048-2334
The objective of this paper is to propose a high-precision control strategy for the primary-side regulated flyback converter. The primary-side regulated flyback converter with universal input voltage is widely used for low-cost and low power applications such as the LED lighting with constant output currents. However, the conventional primary-side regulation method suffers from the drawback of current inaccuracy and the LED may be easily damaged. Therefore, a high-precision primary-side regulation strategy for the flyback converter with constant output current is proposed. In this paper, the cause of the output current inaccuracy is discussed and the operation principle of the proposed high-precision current control for the primary-side regulated flyback converter is introduced. Hardware experimental measurements are presented to verify the performance of the proposed control strategy.