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

IPC: H02M3/335 ,  H02M1/00

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：US20250023443A1

公开(公告)日：2025-01-16

申请号：US18366707

申请日：2023-08-08

Applicant: Power Forest Technology Corporation

Inventor： Yu-Chao Lin ,  Kuan-Chun Fang ,  Zhi-Yang Zhang ,  Chien-Wei Kuan

IPC: H02M1/00 ,  H02M3/24

Abstract: A feedback circuit is used for a power supply device. The power supply device includes a primary side circuit and a secondary side circuit. The feedback circuit includes a feedback voltage generation circuit, a base voltage generation circuit, and a compensation signal generation circuit. The feedback voltage generation circuit is electrically connected to the secondary side circuit. The feedback voltage generation circuit generates a feedback voltage according to a bias voltage and an output voltage of the power supply device. The base voltage generation circuit generates a base voltage according to the feedback voltage. The compensation signal generation circuit generates a compensation signal according to the feedback voltage and the base voltage and provides the compensation signal to a controller in the primary side circuit. A voltage value of the feedback voltage is lower than a voltage value of the bias voltage. The voltage value of the feedback voltage varies with the change of the output voltage.

公开(公告)号：US20240356426A1

公开(公告)日：2024-10-24

申请号：US18365246

申请日：2023-08-04

Applicant: Power Forest Technology Corporation

Inventor： Kuan-Chun Fang ,  Yu-Chao Lin ,  Jenn-Hwa Shyu ,  Ting-Ching Hsu ,  Chien-Wei Kuan

IPC: H02M1/00

CPC classification number: H02M1/0012

Abstract: A controller for a power supply device includes a transmission terminal, first and second memory circuits, a determining circuit, and a control circuit. The determining circuit generates a first mode signal when an input voltage value is lower than a reference voltage value and generates a second mode signal when the input voltage value is greater than or equal to the reference voltage value. The control circuit enters a first mode and a second mode in response to the first mode signal and the second mode signal, respectively. The control circuit writes a control parameter from the transmission terminal into the first memory circuit in the first mode and uses the control parameter in the second mode to test the power supply device. When the control parameter meets an expected function of the power supply device, the control circuit writes the control parameter into the second memory 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

IPC: H02M3/335 ,  H02M1/00

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.