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中文摘要：
研究了无光耦的原边控制（PSR）高功率因数临界连续导电模式（CRM）反激变换器的工作原理。针对高功率因数CRM PSR反激变换器输出电流精度受输入电压影响的问题,提出了一种新型高精度高功率因数CRM PSR反激变换器。通过引入输入电压前馈控制,消除了输入电压对LED驱动电源输出电流精度的影响,最后通过实验验证了理论推导的正确性。
英文摘要：
The operation theory of the primary side regulation（ PSR） high power factor（ PF） critical conduction mode（ CRM） flyback LED driver without optocoupler is analyzed in this paper. Through analyzing the operation theory of traditional PSR high PFC CRM flyback LED driver,the relationship between input voltage and the error output current is given. In order to improve the output current accuracy of PSR high PF CRM flyback LED driver,a novel high accuracy high power factor CRM PSR flyback LED driver is proposed. By introducing the control with input voltage feed-forward to eliminate the influence of the input voltage to the output current accuracy of the LED driver,high accuracy high power factor PSR CRM flyback LED driver can be achieved. So that the use of primary side regulation on LED driver is more feasible. Finally,the experimental results of traditional and proposed PSR high PFC CRM flyback LED driver verify the correctness of the theoretical derivation.
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