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发明授权
US09509224B2 Method for controlling synchronous rectifier of power converter and control circuit using the same 有权
用于控制电力转换器的同步整流器和使用其的控制电路的方法

Method for controlling synchronous rectifier of power converter and control circuit using the same
摘要：
The invention discloses a method for controlling a synchronous rectifier of a power converter and a control circuit using the same. The method includes the following steps. A control signal is generated to control a synchronous rectification transistor in response to an on-time of a switching signal, a level of a transformer voltage and an output voltage of the power converter. The switching signal is used for switching a transformer. The control signal is generated once the switching signal is turned off. A transformer signal is related to an input voltage of the power converter. The control signal is generated when the on-time of the switching signal is longer than a first time threshold.
摘要（中）：

本发明公开了一种用于控制功率转换器的同步整流器和使用该同步整流器的控制电路的方法。 该方法包括以下步骤。 产生控制信号以响应于开关信号的接通时间，变压器电压的电平和功率转换器的输出电压来控制同步整流晶体管。 开关信号用于开关变压器。 一旦切换信号被关闭，就产生控制信号。 变压器信号与功率转换器的输入电压有关。 当开关信号的接通时间长于第一时间阈值时，产生控制信号。

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