-
公开(公告)号：US20250105753A1
公开(公告)日：2025-03-27
申请号：US18509179
申请日：2023-11-14
Applicant: Power Forest Technology Corporation
Inventor： Che-Hao Meng , Chien Lung Li , Chia-Hsien Liu
Abstract: A synchronous rectifier device for a power converter is provided. A power converter includes at least one secondary circuit and a transformer. The synchronous rectifier device includes a synchronous rectification circuit and a controller. The synchronous rectification circuit includes a synchronous rectification switch and a current receiving circuit. The synchronous rectification switch is coupled between the secondary circuit and a secondary winding of the transformer. The current receiving circuit provides a current signal based on a current flowing through the synchronous rectification switch. The controller controls the synchronous rectification switch according to the current signal. In a case that the synchronous rectification switch is turned off, when the current signal indicates that a current value of the current is greater than a predetermined value, the controller turns on the synchronous rectification switch.
-
公开(公告)号：US11916487B2
公开(公告)日：2024-02-27
申请号：US17702813
申请日：2022-03-24
Applicant: Power Forest Technology Corporation
Inventor： Chao-Chang Chiu , Kuan-Chun Fang , Yueh-Chang Chen , Tzu-Chi Huang , Che-Hao Meng
CPC classification number: H02M3/33569 , H02M1/0009
Abstract: An asymmetric half-bridge converter is provided. The asymmetric half-bridge converter includes a switch circuit, a resonance tank, a current sensor, and a controller. The current sensor senses a waveform of a resonance current flowing through the resonance tank to generate a sensing result. The controller determines the sensing result. When the sensing result indicates that an ending current value of a primary resonance waveform of the resonance current is greater than a predetermined value, the controller performs a first switching operation on the switch circuit. When the sensing result indicates that the ending current value of the primary resonance waveform is less than or equal to the predetermined value, the controller performs a second switching operation on the switch circuit.
-
公开(公告)号：US20230261580A1
公开(公告)日：2023-08-17
申请号：US17702813
申请日：2022-03-24
Applicant: Power Forest Technology Corporation
Inventor： Chao-Chang Chiu , Kuan-Chun Fang , Yueh-Chang Chen , Tzu-Chi Huang , Che-Hao Meng
CPC classification number: H02M3/33569 , H02M1/0009
Abstract: An asymmetric half-bridge converter is provided. The asymmetric half-bridge converter includes a switch circuit, a resonance tank, a current sensor, and a controller. The current sensor senses a waveform of a resonance current flowing through the resonance tank to generate a sensing result. The controller determines the sensing result. When the sensing result indicates that an ending current value of a primary resonance waveform of the resonance current is greater than a predetermined value, the controller performs a first switching operation on the switch circuit. When the sensing result indicates that the ending current value of the primary resonance waveform is less than or equal to the predetermined value, the controller performs a second switching operation on the switch circuit.
-
公开(公告)号：US20250105754A1
公开(公告)日：2025-03-27
申请号：US18509208
申请日：2023-11-14
Applicant: Power Forest Technology Corporation
Inventor： Che-Hao Meng , Chien Lung Li , Chia-Hsien Liu
Abstract: A control circuit for a synchronous rectification switch of a power converter is provided. The synchronous rectification switch and a transformer of the power converter are coupled to a connection node. The control circuit includes a first logic circuit, an integrating circuit, a setting comparator, a logic gate, and a second logic circuit. The first logic circuit provides a detection signal according to a detection voltage on the connection node. The integrating circuit performs an accumulation operation on the integrated voltage value based on the detection signal to generate a setting pulse. The setting comparator provides a comparison signal according to the detection voltage and a first predetermined voltage. The logic gate outputs a setting signal according to the setting pulse and the comparison signal. The second logic circuit continuously provides a turn-on control signal in response to the setting signal. The synchronous rectification switch is turned on in response to the turn-on control signal.
-
-
-
Search Results
4
records
(took 0.012 seconds)
