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Quasi-resonant flyback PSR converter with adaptive frequency control

机译：准谐振反激PSR转换器，具有自适应频率控制

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摘要

In this paper, a quasi-resonant (QR) flyback primary-side regulation (PSR) converter with adaptive frequency control is proposed. The converter adopts the PSR scheme to detect load information through the auxiliary winding. The converter employs the QR control scheme to switch in the valley mode either in CV or CC operation, which greatly reduces the switching loss. In addition, according to the load condition, the converter adaptively reduces the switching frequency and realize valley switching, which achieves better light-load efficiency in the CV mode. The proposed QR converter was implemented using the HHGRACE 0.35 mu m BCD process and verified in a 5 V/1A circuit prototype. Experimental results show that the light-load power efficiency of the proposed converter is improved by up to 4.0% when compared to the conventional QR controller. In addition, the valley switching is realized under different load conditions, which improves the system efficiency in the entire range of output load.
机译：在本文中，提出了一种具有自适应频率控制的准谐振（QR）反激初级侧调节（PSR）转换器。转换器采用PSR方​​案来通过辅助绕组检测负载信息。转换器采用QR控制方案以在CV或CC操作中切换谷模式，这大大降低了开关损耗。另外，根据负载条件，转换器自适应地降低开关频率并实现谷切换，这在CV模式下实现了更好的光负荷效率。所提出的QR转换器是使用HHRGARE 0.35 MU M BCD过程实现的，并在5 V / 1A电路原型中验证。实验结果表明，与传统QR控制器相比，所提出的转换器的亮载功率效率高达4.0％。此外，在不同的负载条件下实现谷开关，从而提高了整个输出负载范围内的系统效率。

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