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Front. Inform. Technol. Electron. Eng.  2013, Vol. 14 Issue (8): 652-662    DOI: 10.1631/jzus.C1200344
    
A multimode digital controller IC for flyback converter with high accuracy primary-side feedback
Jian-ping Qiu, Le-nian He, Yu-lin Wang
Institute of Very Large Scale Integrated Circuits Design, Zhejiang University, Hangzhou 310027, China
A multimode digital controller IC for flyback converter with high accuracy primary-side feedback
Jian-ping Qiu, Le-nian He, Yu-lin Wang
Institute of Very Large Scale Integrated Circuits Design, Zhejiang University, Hangzhou 310027, China
 全文: PDF 
摘要： A digital controller IC for the flyback converter with primary-side feedback is proposed. The controller is used for adapter charger or LED driver applications. To obtain high accuracy for the primary-side feedback, a digital primary-side sensing technology is adopted, which can auto-track the knee point of the primary auxiliary winding voltage. Furthermore, an internal digital compensator eliminates the need for external loop compensation components while achieving excellent line and load regulation. The controller could output both constant voltage and constant current depending on the load current. Pulse width modulation and pulse frequency modulation are used in constant voltage mode while quasi-resonant control is used in constant current mode. The digital controller is validated by using FPGA.
关键词： Multimode;  Digital control;  Primary-side sensing;  Quasi-resonant control;  Constant voltage (CV);  Constant current (CC);  LED driver    
Abstract: A digital controller IC for the flyback converter with primary-side feedback is proposed. The controller is used for adapter charger or LED driver applications. To obtain high accuracy for the primary-side feedback, a digital primary-side sensing technology is adopted, which can auto-track the knee point of the primary auxiliary winding voltage. Furthermore, an internal digital compensator eliminates the need for external loop compensation components while achieving excellent line and load regulation. The controller could output both constant voltage and constant current depending on the load current. Pulse width modulation and pulse frequency modulation are used in constant voltage mode while quasi-resonant control is used in constant current mode. The digital controller is validated by using FPGA.
Key words: Multimode    Digital control    Primary-side sensing    Quasi-resonant control    Constant voltage (CV)    Constant current (CC)    LED driver
收稿日期: 2012-12-03 出版日期: 2013-08-02
CLC:  TN4  
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Jian-ping Qiu
Le-nian He
Yu-lin Wang

引用本文:

Jian-ping Qiu, Le-nian He, Yu-lin Wang. A multimode digital controller IC for flyback converter with high accuracy primary-side feedback. Front. Inform. Technol. Electron. Eng., 2013, 14(8): 652-662.

链接本文:

http://www.zjujournals.com/xueshu/fitee/CN/10.1631/jzus.C1200344    或    http://www.zjujournals.com/xueshu/fitee/CN/Y2013/V14/I8/652

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