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公开(公告)号：US20240063706A1
公开(公告)日：2024-02-22
申请号：US17983406
申请日：2022-11-09
Applicant: Leadtrend Technology Corp.
Inventor： Ming-Chang Tsou , Chao-Chih Lin , Meng-Jen Tsai
CPC classification number: H02M1/0025 , H02M1/0058 , H02M3/33507
Abstract: A controller applied to a power converter is installed in a primary side of the power converter. The controller includes a capacitor, an adjustment signal generation circuit, and a discharge circuit. The capacitor is used for generating a tracking voltage. The adjustment signal generation circuit is used for generating an adjustment signal according to a feedback voltage and the tracking voltage. The discharge circuit is used for discharging the capacitor according to the feedback voltage and the adjustment signal. The tracking voltage is used for tracking a state of a magnetizing current of a magnetizing inductor of the primary side of the power converter, and when the tracking voltage consists with the state of the magnetizing current, the tracking voltage is applied to at least one of zero-voltage switching (ZVS) control and quasi-resonant (QR) control of the power converter.
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公开(公告)号：US20240243653A1
公开(公告)日：2024-07-18
申请号：US18407488
申请日：2024-01-09
Applicant: Leadtrend Technology Corp.
Inventor： Chao-Chih Lin , Ming-Chang Tsou
CPC classification number: H02M1/088 , H02M3/3353
Abstract: A primary-side controller applied to a power converter is used for controlling a frequency of a gate control signal according to a grouping mode. The primary-side controller includes a first counter, a second counter, an adjuster, a gate control signal generation circuit, and a logic circuit. The first counter generates a first signal according to the gate control signal and a predetermined number. The second counter generates a second signal according to a clock signal and the predetermined number. The adjuster determines whether to adjust the predetermined number according to the second signal, the predetermined number, and a frequency of the clock signal. The logic circuit generates a reset signal to the first counter and the second counter and an enable signal to the gate control signal generation circuit according to the first signal, the second signal, and the gate control signal.
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公开(公告)号：US12149157B2
公开(公告)日：2024-11-19
申请号：US17983406
申请日：2022-11-09
Applicant: Leadtrend Technology Corp.
Inventor： Ming-Chang Tsou , Chao-Chih Lin , Meng-Jen Tsai
Abstract: A controller applied to a power converter is installed in a primary side of the power converter. The controller includes a capacitor, an adjustment signal generation circuit, and a discharge circuit. The capacitor is used for generating a tracking voltage. The adjustment signal generation circuit is used for generating an adjustment signal according to a feedback voltage and the tracking voltage. The discharge circuit is used for discharging the capacitor according to the feedback voltage and the adjustment signal. The tracking voltage is used for tracking a state of a magnetizing current of a magnetizing inductor of the primary side of the power converter, and when the tracking voltage consists with the state of the magnetizing current, the tracking voltage is applied to at least one of zero-voltage switching (ZVS) control and quasi-resonant (QR) control of the power converter.
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