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公开(公告)号：US12107413B2
公开(公告)日：2024-10-01
申请号：US17692702
申请日：2022-03-11
发明人： Aimin Xu
CPC分类号： H02H7/1213 , H02H1/0007
摘要： Disclosed is a switch protection circuit and a power converter, configured to set upper and lower limit-value current signals which can be adjusted along with an input voltage, so that instantaneous power of a main power switch can be prevented from being too high, and the main power switch can always be operated within a safe operating range, thereby solving the problem that the power converter is easy to be damaged in applications under a high-current circumstance.
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公开(公告)号：US11777409B2
公开(公告)日：2023-10-03
申请号：US17544609
申请日：2021-12-07
发明人： Aimin Xu
CPC分类号： H02M3/1588 , H02M1/0009
摘要： An inductive current simulation circuit of a switching circuit, an inductive current simulation method of the switching circuit, and a switched-mode power supply are provided. The inductive current simulation method includes the following steps: based on an error amplification circuit, performing, by the error amplification circuit, an error amplification on a first sampling signal representing a current of a synchronous rectifier and a second sampling signal representing an inductive current simulation signal when the synchronous rectifier is turned on to obtain an error amplification signal; and reconstructing an inductive current according to the error amplification signal when the synchronous rectifier is turned on and a first current when a main power transistor is turned on to obtain the inductive current simulation signal.
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3.发明授权公开(公告)号：US11791704B2
公开(公告)日：2023-10-17
申请号：US17567010
申请日：2021-12-31
CPC分类号： H02M1/0029 , H02M1/08 , H03M1/66
摘要： A control method of a switching circuit, a control circuit of the switching circuit and the switching circuit are provided. The control circuit includes a slope buffer and a first operational amplifier. The slope buffer receives a first voltage reference, and controls slopes of a rising edge and a falling edge to generate a second voltage reference. The first operational amplifier receives an output feedback voltage and a reference voltage, and performs an operational amplification to obtain a compensation voltage. When the first voltage reference has the falling edge, the reference voltage is coupled to the first voltage reference through a first switch, and the second voltage reference is coupled to an output voltage through a second switch. When the first voltage reference has the rising edge, the reference voltage is coupled to the second voltage reference through a third switch.
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