公开(公告)号：US11462995B2

公开(公告)日：2022-10-04

申请号：US16953293

申请日：2020-11-19

Applicant: Leadtrend Technology Corp.

Inventor： Ming-Chang Tsou ,  Kuan-Hsien Chou ,  Yi-Chuan Tsai ,  Cheng-Tsung Ho

IPC: H02M1/42 ,  H02M1/00

Abstract: A power factor correction (PFC) controller applied to a primary side of a power converter includes a feedback pin, a sensing pin, a current detecting circuit, an output voltage detecting circuit, and a determination circuit. The current detecting circuit is coupled to the feedback pin and the sensing pin for detecting an output current of a secondary side of the power converter according to a feedback voltage of the feedback pin and a sensing voltage of the sensing pin. The output voltage detecting circuit is coupled to the feedback pin for detecting an output voltage of the secondary side of the power converter according to the feedback voltage. The determination circuit is coupled to the current detecting circuit and the output voltage detecting circuit for turning on or turning off a PFC circuit coupled to the power converter according to the output current and the output voltage.

公开(公告)号：US09621055B2

公开(公告)日：2017-04-11

申请号：US14841683

申请日：2015-08-31

Applicant: Leadtrend Technology Corp.

Inventor： Yi-Chuan Tsai

IPC: H02M3/335 ,  H02M7/757 ,  H02M1/32 ,  H02M1/00

CPC classification number: H02M3/33507 ,  H02M1/32 ,  H02M2001/0051 ,  Y02B70/1433 ,  Y02B70/1491

Abstract: A controller with leakage current protection of a diode includes a comparison unit, a reference voltage generation unit, a time out signal generation unit, and a gate signal generation unit, wherein the diode is applied to a secondary side of a power converter. The comparison unit outputs a corresponding selection signal according to a compensation voltage and a threshold. The reference voltage generation unit outputs a corresponding reference voltage range according to the corresponding selection signal. The time out signal generation unit determines a corresponding time out according to the corresponding selection signal, and generates a corresponding time out signal when a voltage corresponding to an auxiliary winding has no peak to cross an upper limit of the corresponding reference voltage range during the corresponding time out. The gate signal generation unit enters the leakage current protection or a quasi-resonant mode according to the corresponding time out signal.

公开(公告)号：US20210281166A1

公开(公告)日：2021-09-09

申请号：US16953293

申请日：2020-11-19

Applicant: Leadtrend Technology Corp.

Inventor： Ming-Chang Tsou ,  Kuan-Hsien Chou ,  Yi-Chuan Tsai ,  Cheng-Tsung Ho

IPC: H02M1/42

Abstract: A power factor correction (PFC) controller applied to a primary side of a power converter includes a feedback pin, a sensing pin, a current detecting circuit, an output voltage detecting circuit, and a determination circuit. The current detecting circuit is coupled to the feedback pin and the sensing pin for detecting an output current of a secondary side of the power converter according to a feedback voltage of the feedback pin and a sensing voltage of the sensing pin. The output voltage detecting circuit is coupled to the feedback pin for detecting an output voltage of the secondary side of the power converter according to the feedback voltage. The determination circuit is coupled to the current detecting circuit and the output voltage detecting circuit for turning on or turning off a PFC circuit coupled to the power converter according to the output current and the output voltage.

公开(公告)号：US20160065078A1

公开(公告)日：2016-03-03

申请号：US14841683

申请日：2015-08-31

Applicant: Leadtrend Technology Corp.

Inventor： Yi-Chuan Tsai

IPC: H02M3/335

CPC classification number: H02M3/33507 ,  H02M1/32 ,  H02M2001/0051 ,  Y02B70/1433 ,  Y02B70/1491

Abstract: A controller with leakage current protection of a diode includes a comparison unit, a reference voltage generation unit, a time out signal generation unit, and a gate signal generation unit, wherein the diode is applied to a secondary side of a power converter. The comparison unit outputs a corresponding selection signal according to a compensation voltage and a threshold. The reference voltage generation unit outputs a corresponding reference voltage range according to the corresponding selection signal. The time out signal generation unit determines a corresponding time out according to the corresponding selection signal, and generates a corresponding time out signal when a voltage corresponding to an auxiliary winding has no peak to cross an upper limit of the corresponding reference voltage range during the corresponding time out. The gate signal generation unit enters the leakage current protection or a quasi-resonant mode according to the corresponding time out signal.

Abstract translation: 具有二极管泄漏电流保护的控制器包括比较单元，参考电压产生单元，超时信号产生单元和门信号产生单元，其中二极管被施加到功率转换器的次级侧。 比较单元根据补偿电压和阈值输出相应的选择信号。 参考电压产生单元根据相应的选择信号输出相应的参考电压范围。 超时信号生成单元根据对应的选择信号确定相应的超时，并且当对应于辅助绕组的电压没有峰值时，产生对应的超时信号，以跨过相应参考电压范围的上限 时间到。 门信号产生单元根据相应的超时信号进入漏电流保护或准谐振模式。