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A multimode digital controller IC for flyback converter with high accuracy primary-side feedback 被引量:3

A multimode digital controller IC for flyback converter with high accuracy primary-side feedback
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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. 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.
出处 《Journal of Zhejiang University-Science C(Computers and Electronics)》 SCIE EI 2013年第8期652-662,共11页 浙江大学学报C辑(计算机与电子(英文版)
关键词 MULTIMODE Digital control Primary-side sensing Quasi-resonant control Constant voltage (CV) Constant current (CC) LED driver Multimode, Digital control, Primary-side sensing, Quasi-resonant control, Constant voltage (CV), Constant current(CC), LED driver
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