公开(公告)号：US09847732B2

公开(公告)日：2017-12-19

申请号：US15061192

申请日：2016-03-04

申请人： Power Integrations, Inc.

发明人： Adrian Lefedjiev ,  Toine Werner

IPC分类号： H02M3/335 ,  H02M1/36

CPC分类号： H02M3/33592 ,  H02M1/36 ,  H02M3/33523 ,  Y02B70/1475

摘要： A controller for a use with a power converter includes a sensor coupled to sense a signal on a secondary side of the power converter. The sensor is coupled to detect a turn off of a power switch on a primary side of the power converter. A charge source is coupled to charge a control terminal of a synchronous rectifier on the secondary side of the power converter in response to said detection of the turn off of the power switch to a voltage beyond a threshold voltage of the synchronous rectifier to allow the synchronous rectifier to conduct a current of the secondary winding. A linear amplifier having an output is coupled to sink current from the control terminal of the synchronous rectifier in response to a difference between a voltage across the synchronous rectifier and an amplifier reference value.

公开(公告)号：US20160190949A1

公开(公告)日：2016-06-30

申请号：US15061192

申请日：2016-03-04

申请人： Power Integrations, Inc.

发明人： Adrian Lefedjiev ,  Toine Werner

IPC分类号： H02M3/335 ,  H02M1/36

CPC分类号： H02M3/33592 ,  H02M1/36 ,  H02M3/33523 ,  Y02B70/1475

摘要： A controller for a use with a power converter includes a sensor coupled to sense a signal on a secondary side of the power converter. The sensor is coupled to detect a turn off of a power switch on a primary side of the power converter. A charge source is coupled to charge a control terminal of a synchronous rectifier on the secondary side of the power converter in response to said detection of the turn off of the power switch to a voltage beyond a threshold voltage of the synchronous rectifier to allow the synchronous rectifier to conduct a current of the secondary winding. A linear amplifier having an output is coupled to sink current from the control terminal of the synchronous rectifier in response to a difference between a voltage across the synchronous rectifier and an amplifier reference value.

摘要翻译： 用于与功率转换器一起使用的控制器包括耦合以感测功率转换器的次级侧上的信号的传感器。 传感器被耦合以检测功率转换器的初级侧上的电源开关的关闭。 电荷源被耦合以对功率转换器的次级侧上的同步整流器的控制端子进行充电，以响应于所述检测到功率开关的断开而超出同步整流器的阈值电压的电压，以允许同步整流器 整流器传导次级绕组的电流。 具有输出的线性放大器响应于同步整流器两端的电压和放大器参考值之间的差异而被耦合以从同步整流器的控制端子吸收电流。

公开(公告)号：US09312777B2

公开(公告)日：2016-04-12

申请号：US14290621

申请日：2014-05-29

申请人： Power Integrations, Inc.

发明人： Adrian Lefedjiev ,  Toine Werner

IPC分类号： H02M3/335

CPC分类号： H02M3/33592 ,  H02M1/36 ,  H02M3/33523 ,  Y02B70/1475

摘要： This invention generally relates to synchronous rectifier controllers for an SMPS. One controller comprises: a sensor to sense a signal on a secondary side, to detect turn off of the switch; a charge source to, in response to a said detection, charge a control terminal of the rectifier to a voltage beyond a threshold voltage of the synchronous rectifier to allow the synchronous rectifier to conduct current of the secondary winding; and a linear amplifier having an output to sink current from the control terminal dependent on a difference between a voltage across the synchronous rectifier and an amplifier reference value, said voltage across the synchronous rectifier being a voltage across a controllable conduction path for current of the secondary winding, the linear amplifier to inhibit discharge of the control terminal from the voltage beyond the threshold voltage until the voltage across the synchronous rectifier reaches the amplifier reference value.

摘要翻译： 本发明一般涉及用于SMPS的同步整流器控制器。 一个控制器包括：传感器，用于感测次级侧的信号，以检测开关的关闭; 响应于所述检测，电荷源将整流器的控制端子充电到超过同步整流器的阈值电压的电压，以允许同步整流器传导次级绕组的电流; 取决于同步整流器两端的电压与放大器参考值之间的差异，具有从控制端子吸收电流的输出的线性放大器，所述同步整流器两端的所述电压是用于次级电流的可控传导路径的电压 绕组，线性放大器禁止控制端子从超过阈值电压的电压，直到同步整流器两端的电压达到放大器参考值。