公开(公告)号：US20170012539A1

公开(公告)日：2017-01-12

申请号：US14884784

申请日：2015-10-16

Applicant: Power Forest Technology Corporation

Inventor： Chun-Teh Chen

IPC: H02M3/335

CPC classification number: H02M3/33523 ,  H02M2001/0009

Abstract: A power conversion apparatus including a flyback power conversion circuit, a control chip and a detection auxiliary circuit is provided. The flyback power conversion circuit converts an input voltage into a direct current (DC) output voltage. The control chip generates a pulse width modulation (PWM) signal for controlling operations of the flyback power conversion circuit. The detection auxiliary circuit assists the control chip in obtaining a first detection voltage via a multi-function detection pin of the control chip within an enabling period of the PWM signal, so as to execute an over current detection according to the first detection voltage. Besides, the detection auxiliary circuit assists the control chip in obtaining a second detection voltage via the multi-function detection pin within a disabling period of the PWM signal, so as to execute a valley voltage detection according to the second detection voltage.

Abstract translation: 提供一种包括反激式电力转换电路，控制芯片和检测辅助电路的电力转换装置。 反激式功率转换电路将输入电压转换为直流（DC）输出电压。 控制芯片产生用于控制回扫功率转换电路的操作的脉宽调制（PWM）信号。 检测辅助电路通过控制芯片的多功能检测引脚在PWM信号的使能周期内帮助控制芯片获得第一检测电压，从而根据第一检测电压执行过电流检测。 此外，检测辅助电路辅助控制芯片在PWM信号的禁用周期内通过多功能检测引脚获得第二检测电压，以便根据第二检测电压执行谷值电压检测。

公开(公告)号：US20130329472A1

公开(公告)日：2013-12-12

申请号：US13776736

申请日：2013-02-26

Applicant: POWER FOREST TECHNOLOGY CORPORATION

Inventor： Chun-Teh Chen

IPC: H02H7/125

CPC classification number: H02H7/1252 ,  H02M1/10 ,  H02M1/32 ,  H02M1/4225 ,  H02M2001/0009 ,  H02M2001/0025 ,  Y02B70/126

Abstract: A power factor correction (PFC) power conversion apparatus and a power conversion method thereof are provided. In the invention, by switching a detection switch disposed inside a control chip and connected to a detection pin of the control chip at a certain time, and performing a detection of an input voltage received by a boost power conversion circuit at the certain time through a collocation between a current detection auxiliary circuit and a current detection main circuit. Accordingly, an over current protection (OCP) point corresponding to whether an OCP mechanism is activated is compensated according to the detected result, and thus the detection manner of the OCP performed by the invention can be adaptively suitable for different input voltages. In the invention, according to the detected result, a brown out protection also can be performed, and the output of the boost power conversion circuit also can be changed or determined.

Abstract translation: 提供功率因数校正（PFC）功率转换装置及其功率转换方法。 在本发明中，通过在一定时间切换配置在控制芯片内部并与控制芯片的检测引脚相连的检测开关，并且通过一定时间对特定时刻的升压电力转换电路接收到的输入电压进行检测 电流检测辅助电路和电流检测主电路之间的配置。 因此，根据检测结果补偿对应于OCP机制是否被激活的过电流保护（OCP）点，因此本发明执行的OCP的检测方式可以适应于不同的输入电压。 在本发明中，根据检测结果，也可以进行欠压保护，也可以改变或确定升压功率转换电路的输出。

公开(公告)号：US09190835B2

公开(公告)日：2015-11-17

申请号：US13776736

申请日：2013-02-26

Applicant: Power Forest Technology Corporation

Inventor： Chun-Teh Chen

IPC: H02M1/42 ,  H02H7/125 ,  H02M1/32 ,  H02M1/10 ,  H02M1/00

CPC classification number: H02H7/1252 ,  H02M1/10 ,  H02M1/32 ,  H02M1/4225 ,  H02M2001/0009 ,  H02M2001/0025 ,  Y02B70/126

Abstract: A power factor correction (PFC) power conversion apparatus and a power conversion method thereof are provided. In the invention, by switching a detection switch disposed inside a control chip and connected to a detection pin of the control chip at a certain time, and performing a detection of an input voltage received by a boost power conversion circuit at the certain time through a collocation between a current detection auxiliary circuit and a current detection main circuit. Accordingly, an over current protection (OCP) point corresponding to whether an OCP mechanism is activated is compensated according to the detected result, and thus the detection manner of the OCP performed by the invention can be adaptively suitable for different input voltages. In the invention, according to the detected result, a brown out protection also can be performed, and the output of the boost power conversion circuit also can be changed or determined.

Abstract translation: 提供功率因数校正（PFC）功率转换装置及其功率转换方法。 在本发明中，通过在一定时间切换配置在控制芯片内部并与控制芯片的检测引脚相连的检测开关，并且通过一定时间对特定时刻的升压电力转换电路接收到的输入电压进行检测 电流检测辅助电路和电流检测主电路之间的配置。 因此，根据检测结果补偿对应于OCP机制是否被激活的过电流保护（OCP）点，因此本发明执行的OCP的检测方式可以适应于不同的输入电压。 在本发明中，根据检测结果，也可以进行欠压保护，也可以改变或确定升压功率转换电路的输出。

公开(公告)号：US09742295B2

公开(公告)日：2017-08-22

申请号：US14884784

申请日：2015-10-16

Applicant: Power Forest Technology Corporation

Inventor： Chun-Teh Chen

IPC: H02M3/335 ,  H02M1/00

CPC classification number: H02M3/33523 ,  H02M2001/0009

Abstract: A power conversion apparatus including a flyback power conversion circuit, a control chip and a detection auxiliary circuit is provided. The flyback power conversion circuit converts an input voltage into a direct current (DC) output voltage. The control chip generates a pulse width modulation (PWM) signal for controlling operations of the flyback power conversion circuit. The detection auxiliary circuit assists the control chip in obtaining a first detection voltage via a multi-function detection pin of the control chip within an enabling period of the PWM signal, so as to execute an over current detection according to the first detection voltage. Besides, the detection auxiliary circuit assists the control chip in obtaining a second detection voltage via the multi-function detection pin within a disabling period of the PWM signal, so as to execute a valley voltage detection according to the second detection voltage.