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1. 发明授权

US08004862B2 Offline synchronous rectifying circuit with current transformer for soft switching power converters 有权
标题翻译：带电流互感器的离线同步整流电路，用于软开关电源转换器
公开(公告)号：US08004862B2
公开(公告)日：2011-08-23
申请号：US12036997
申请日：2008-02-25
申请人： Ta-Yung Yang , Chou Sheng Wang , Wei Li Hsu
发明人： Ta-Yung Yang , Chou Sheng Wang , Wei Li Hsu
IPC分类号： H02M3/335 , H02M5/42
CPC分类号： H02M3/33592 , Y02B70/1433 , Y02B70/1475
摘要： A synchronous rectifying circuit of soft switching power converter is provided to improve the efficiency. The integrated synchronous rectifier includes a power transistor connected from a transformer to the output of the power converter for rectifying. A controller having a latch circuit generates a drive signal to control the power transistor in response to a switching-current signal. A current transformer generates the switching-current signal in response to the switching current of the transformer. The controller turns off the power transistor when the switching-current signal is lower than a second threshold. The power transistor is turned on once the switching-current signal is higher than a first threshold. Furthermore, a pulse-width detection circuit generates a pulse signal coupled to disable the drive signal and turn off the power transistor.
摘要翻译：提供了软开关电源转换器的同步整流电路，以提高效率。集成同步整流器包括从变压器连接到功率转换器的输出端的功率晶体管，用于整流。具有锁存电路的控制器产生驱动信号以响应于开关电流信号来控制功率晶体管。电流互感器响应于变压器的开关电流产生开关电流信号。当开关电流信号低于第二阈值时，控制器关闭功率晶体管。一旦开关电流信号高于第一阈值，功率晶体管就导通。此外，脉冲宽度检测电路产生耦合以禁用驱动信号并关断功率晶体管的脉冲信号。

2. 发明申请

US20090213628A1 OFFLINE SYNCHRONOUS RECTIFYING CIRCUIT WITH CURRENT TRANSFORMER FOR SOFT SWITCHING POWER CONVERTERS 有权
标题翻译：带电流互感器的离合同步整流电路，用于软开关电源转换器
公开(公告)号：US20090213628A1
公开(公告)日：2009-08-27
申请号：US12036997
申请日：2008-02-25
申请人： Ta-Yung YANG , Chou Sheng Wang , Wei Li Hsu
发明人： Ta-Yung YANG , Chou Sheng Wang , Wei Li Hsu
IPC分类号： H02M7/217
CPC分类号： H02M3/33592 , Y02B70/1433 , Y02B70/1475
摘要： A synchronous rectifying circuit of soft switching power converter is provided to improve the efficiency. The integrated synchronous rectifier includes a power transistor connected from a transformer to the output of the power converter for rectifying. A controller having a latch circuit generates a drive signal to control the power transistor in response to a switching-current signal. A current transformer generates the switching-current signal in response to the switching current of the transformer. The controller turns off the power transistor when the switching-current signal is lower than a second threshold. The power transistor is turned on once the switching-current signal is higher than a first threshold. Furthermore, a pulse-width detection circuit generates a pulse signal coupled to disable the drive signal and turn off the power transistor.
摘要翻译：提供了软开关电源转换器的同步整流电路，以提高效率。集成同步整流器包括从变压器连接到功率转换器的输出端的功率晶体管，用于整流。具有锁存电路的控制器产生驱动信号以响应于开关电流信号来控制功率晶体管。电流互感器响应于变压器的开关电流产生开关电流信号。当开关电流信号低于第二阈值时，控制器关闭功率晶体管。一旦开关电流信号高于第一阈值，功率晶体管就导通。此外，脉冲宽度检测电路产生耦合以禁用驱动信号并关断功率晶体管的脉冲信号。

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