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公开(公告)号：EP4106167A1
公开(公告)日：2022-12-21
申请号：EP22178920.9
申请日：2022-06-14
发明人： HUANG, Qiukai , DAI, Jiandong
摘要： A control circuit and an AC-DC power supply are provided. A ripple reference signal characterizing an industrial frequency ripple component of an output voltage is added to a reference voltage of a desired output voltage, so that a reference and a feedback voltage of the output voltage are almost the same at the industrial frequency band. In addition, a voltage compensation signal outputted by an error compensation circuit does not include the industrial frequency ripple component, and the voltage compensation signal without the industrial frequency ripple component does not affect a tracking reference of the current loop. Therefore, the loop can be designed without considering limit of the industrial frequency on a cut-off frequency of the loop, thereby effectively increasing the cut-off frequency of the loop and improving a dynamic response speed of the loop.
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公开(公告)号：EP4167455A1
公开(公告)日：2023-04-19
申请号：EP22201717.0
申请日：2022-10-14
发明人： CHEN, Zhan , HUANG, Qiukai , JIN, Jin , ZHANG, Guiying
摘要： A switch-mode converter, a control method for the same, and a control circuit for the same are provided. An overcurrent reference threshold is determined according to an output voltage sampling signal and a predetermined overcurrent protection curve. When an output current sampling signal and the overcurrent reference threshold meet a predetermined criterion, an overcurrent protection triggering signal is generated to trigger the switch-mode converter to enter a protection state. Hence, the overcurrent protection is provided for the switch-mode converter to reduce safety risks on the condition that Limited Power Source (LPS) requirements are met.
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公开(公告)号：EP4102719A1
公开(公告)日：2022-12-14
申请号：EP22176113.3
申请日：2022-05-30
发明人： CHEN, Zhan , DENG, Jian , HUANG, Qiukai
IPC分类号： H03K17/0412
摘要： A driving circuit and a driving method are provided. In technical solutions according to embodiments of the present disclosure, a power switch is driven by constant voltage or constant current during different time periods. The power switch is driven by using a first driving current during a Miller platform period, and the power switch is driven by using a second driving current when the Miller platform period ends, where the first driving current is less than the second driving current, so as to optimize EMI, reduce loss and improve efficiency.
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公开(公告)号：EP4089901A1
公开(公告)日：2022-11-16
申请号：EP22173059.1
申请日：2022-05-12
发明人： LUO, Nan , HUANG, Qiukai
摘要： An AC-DC power converter and a conversion method for the AC-DC power converter are provided. A DC bus voltage can meet input voltage requirements of a subsequently connected DC converter by means of a bidirectional DC converter connected to a rectifier circuit, to increase a time interval for which the AC input power supply provides power to the subsequently connected DC converter, and reduce the requirements for capacity and a volume of a first capacitor in the rectifier circuit and capacity and a volume of a second capacitor connected to the second end of the bidirectional DC converter, so that a total volume of the capacitors connected at the subsequent stage of the rectifier bridge can be greatly reduced, to reduce a volume of the power converter, thereby improving the power density of the power converter.
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