公开(公告)号：US09667168B2

公开(公告)日：2017-05-30

申请号：US14710479

申请日：2015-05-12

Applicant: Integrated Device Technology, Inc.

Inventor： Gabriel C. Aungurencei ,  Vladimir Vitchev

IPC: H02M7/155 ,  H02M7/217 ,  H02M7/219 ,  H02M1/00

CPC classification number: H02M7/217 ,  H02M7/219 ,  H02M2001/0009 ,  H02M2007/2195 ,  Y02B70/1408

Abstract: A system and method of synchronous rectification includes a synchronous rectifier circuit. The synchronous rectifier circuit includes a direct current (DC) load coupled between a DC output node and a ground node, an alternating current (AC) source applying an AC waveform to an AC input node, an upper switch coupled between the DC output node and the AC input node, and a lower switch coupled between the AC input node and the ground node. In a first state, the upper switch is turned on and the lower switch is turned off. In a second state, the upper switch is turned off and the lower switch is turned on. In a third state, the lower switch is operated in an enhanced detection mode. The synchronous rectifier circuit transitions from the second state to the third state when the voltage of the AC input node increases above a threshold voltage.

公开(公告)号：US20160336871A1

公开(公告)日：2016-11-17

申请号：US14710479

申请日：2015-05-12

Applicant: Integrated Device Technology, Inc.

Inventor： Gabriel C. Aungurencei ,  Vladimir Vitchev

IPC: H02M7/217

CPC classification number: H02M7/217 ,  H02M7/219 ,  H02M2001/0009 ,  H02M2007/2195 ,  Y02B70/1408

Abstract: A system and method of synchronous rectification includes a synchronous rectifier circuit. The synchronous rectifier circuit includes a direct current (DC) load coupled between a DC output node and a ground node, an alternating current (AC) source applying an AC waveform to an AC input node, an upper switch coupled between the DC output node and the AC input node, and a lower switch coupled between the AC input node and the ground node. In a first state, the upper switch is turned on and the lower switch is turned off. In a second state, the upper switch is turned off and the lower switch is turned on. In a third state, the lower switch is operated in an enhanced detection mode. The synchronous rectifier circuit transitions from the second state to the third state when the voltage of the AC input node increases above a threshold voltage.

Abstract translation: 同步整流的系统和方法包括同步整流电路。 同步整流电路包括耦合在DC输出节点和接地节点之间的直流（DC）负载，将AC波形施加到AC输入节点的交流（AC）源，耦合在DC输出节点和 AC输入节点和耦合在AC输入节点和接地节点之间的下开关。 在第一状态下，上开关接通，下开关断开。 在第二状态下，上开关断开，下开关接通。 在第三状态下，下部开关以增强的检测模式操作。 当AC输入节点的电压增加到阈值电压以上时，同步整流电路从第二状态转变到第三状态。