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US08488342B2 Systems and methods for constant voltage mode and constant current mode in flyback power converters with primary-side sensing and regulation 有权
具有初级侧感测和调节功能的反激式电源转换器的恒压模式和恒流模式的系统和方法

Systems and methods for constant voltage mode and constant current mode in flyback power converters with primary-side sensing and regulation
Abstract:
System and method for regulating a power converter. The system includes a first signal generator configured to receive a first sensed signal and generate an output signal associated with demagnetization. The first sensed signal is related to a first winding coupled to a secondary winding for a power converter, and the secondary winding is associated with at least an output current for the power converter. Additionally, the system includes a ramping signal generator configured to receive the output signal and generate a ramping signal, and a first comparator configured to receive the ramping signal and a first threshold signal and generate a first comparison signal based on at least information associated with the ramping signal and the first threshold signal. Moreover, the system includes a second comparator configured to receive a second sensed signal and a second threshold signal and generate a second comparison signal.
Abstract(Chinese):

用于调节功率转换器的系统和方法。 该系统包括被配置为接收第一感测信号并产生与去磁相关联的输出信号的第一信号发生器。 第一感测信号与耦合到功率转换器的次级绕组的第一绕组有关，次级绕组至少与功率转换器的输出电流相关联。 另外，该系统包括斜坡信号发生器，其被配置为接收输出信号并产生斜坡信号，以及第一比较器，被配置为接收斜坡信号和第一阈值信号，并且基于至少基于与第 斜坡信号和第一阈值信号。 此外，该系统包括被配置为接收第二感测信号和第二阈值信号并产生第二比较信号的第二比较器。

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