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公开(公告)号：EP4123892A1
公开(公告)日：2023-01-25
申请号：EP22186223.8
申请日：2022-07-21
发明人： CHEN, Chaojun , DENG, Jian , JIN, Jin
摘要： A resonant converter, and a control circuit for the resonant converter are provided. A resonant current of the resonant converter is sampled and sent to the control circuit for integration so as to control the charge of the resonant converter. Further, the feed-forward current is introduced and integrated together with the sampled resonant current. Therefore, when the output power reaches the minimum value due to the charge control, the output power is further reduced, such that the resonant converter smoothly transitions from the charge control to the equivalent frequency control, which further improves the system efficiency and can realize the application of a wide output range.
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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：EP4064540A1
公开(公告)日：2022-09-28
申请号：EP22163550.1
申请日：2022-03-22
发明人： WANG, Longqi , JIN, Jin , WANG, Hongxing
摘要： A control circuit, a control method and a power converter are provided. The control circuit is applied to a power converter. The power converter includes a switching circuit including at least one half-bridge, a transformer including a primary winding and a secondary winding, a resonant inductor and a resonant capacitor which are connected in series with the primary winding to form a resonant module, and a sampling resistor connected in series with the resonant module or connected in series in the resonant module. The control circuit generates a control signal based on an absolute value of a voltage of the sampling resistor and a current reference signal to control an operation state of the switching circuit to adjust an output current of the power converter. The current reference signal represents an expected value of the output current of the power converter.
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