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1. 发明授权

US06917529B2 Unregulated DC-DC converter having synchronous rectification with efficient gate drives 有权
标题翻译：具有高效栅极驱动的同步整流的不稳定的DC-DC转换器
公开(公告)号：US06917529B2
公开(公告)日：2005-07-12
申请号：US10726893
申请日：2003-12-02
申请人： Donald Richard Caron
发明人： Donald Richard Caron
IPC分类号： H02M3/335 , H02M7/5387 , H02H7/122
CPC分类号： H02M1/34 , H02M3/33592 , H02M2001/348 , Y02B70/1475
摘要： An unregulated DC-to-DC power converter suitable for intermediate bus voltage converter applications includes synchronous rectifiers that are driven efficiently to provide faster transition time and reduced loss. The DC-to-DC power converter comprises a transformer having a primary winding and at least first and second secondary windings. An input circuit is coupled to the primary winding and is adapted to apply an alternating polarity square wave voltage to the primary winding. An output circuit comprising an output filter is coupled to a tap of the first secondary winding. The output filter provides a DC output voltage. A first synchronous rectifier is coupled to a first end of the first secondary winding and a second synchronous rectifier is coupled to a second end of the first secondary winding. The second secondary winding has a first end coupled to a control terminal of the first synchronous rectifier and a second end coupled to a control terminal of the second synchronous rectifier. A first snubber circuit is coupled between the control terminal of the first synchronous rectifier and the second end of the first secondary winding. A second snubber circuit is coupled between the control terminal of the second synchronous rectifier and the first end of the first secondary winding. The first and second snubber circuits provide faster transition of the first and second synchronous rectifiers, respectively, between on and off states.
摘要翻译：适用于中间总线电压转换器应用的不受调节的DC-DC电源转换器包括有效驱动以提供更快的转换时间和减少损耗的同步整流器。 DC-DC功率转换器包括具有初级绕组和至少第一和第二次级绕组的变压器。输入电路耦合到初级绕组，并且适于将交替极性方波电压施加到初级绕组。包括输出滤波器的输出电路耦合到第一次级绕组的抽头。输出滤波器提供直流输出电压。第一同步整流器耦合到第一次级绕组的第一端，并且第二同步整流器耦合到第一次级绕组的第二端。第二次级绕组具有耦合到第一同步整流器的控制端的第一端和耦合到第二同步整流器的控制端的第二端。第一缓冲电路耦合在第一同步整流器的控制端和第一次级绕组的第二端之间。第二缓冲电路耦合在第二同步整流器的控制端和第一次级绕组的第一端之间。第一和第二缓冲电路分别在导通和截止状态之间分别提供第一和第二同步整流器的更快的转换。

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