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公开(公告)号：US20220329161A1
公开(公告)日：2022-10-13
申请号：US17531791
申请日：2021-11-21
Applicant: Leadtrend Technology Corp.
Inventor： Ming-Chang Tsou , Cheng-Tsung Ho , Yuan-Chih Lan
Abstract: An efficiency tracking method of a controller applied to a flyback power converter includes before the controller soft starts, an original frequency variation curve setting voltage generated by the controller outputting an original frequency variation curve setting detection current to an original frequency variation curve setting detection resistor determining a frequency variation curve of the flyback power converter, and utilizing adjustment of resistance of the original frequency variation curve setting detection resistor to achieve efficiency optimization. Therefore, the controller controls an output voltage of the flyback power converter and tracks a maximum power point of the flyback power converter according to the efficiency tracking method to achieve efficiency optimization.
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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.
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公开(公告)号：US20240128874A1
公开(公告)日：2024-04-18
申请号：US18540921
申请日：2023-12-15
Applicant: Leadtrend Technology Corp.
Inventor： Ming-Chang Tsou , Cheng-Tsung Ho , Yuan-Chih Lan
CPC classification number: H02M3/335 , H02M1/0009 , H02M1/0048 , H02M3/33507
Abstract: An efficiency tracking method of a controller applied to a flyback power converter includes before the controller soft starts, an original frequency variation curve setting voltage generated by the controller outputting an original frequency variation curve setting detection current to an original frequency variation curve setting detection resistor determining a frequency variation curve of the flyback power converter, and utilizing adjustment of resistance of the original frequency variation curve setting detection resistor to achieve efficiency optimization. Therefore, the controller controls an output voltage of the flyback power converter and tracks a maximum power point of the flyback power converter according to the efficiency tracking method to achieve efficiency optimization.
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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
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.
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