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Shilan Micro applies for a patent on switch mode power supply and its control circuit and control method

Article Source：Kinri Energy | Author：Kinri Energy | Issuing Time：2024.04.01
Shilan Microelectronics has applied for a patent for a switch mode power supply, its control circuit, and control method to improve voltage sampling accuracy under light and no-load conditions.



On March 30, 2024, the financial sector reported that according to the announcement of the China National Intellectual Property Administration, Hangzhou Shilan Microelectronics Co., Ltd. applied for a patent entitled "switching power supply and its control circuit, control method", with the publication number of CN117792104A and the application date of December 2023.

The patent abstract shows that the present application discloses a switch mode power supply and its control circuit and control method. The control circuit includes a feedback detection module, which generates feedback sampling pulses based on the voltage feedback signal of the power supply voltage provided by the auxiliary winding; The loop control module obtains a voltage sampling signal based on the feedback sampling pulse voltage feedback signal, and generates a driving signal based on the voltage sampling signal and current sampling signal to control the constant voltage output of the switching power supply; The power supply control module disconnects the path between the auxiliary winding and the power supply terminal before obtaining the voltage sampling signal, and after the driving signal jumps to an invalid state or the driving signal jumps to an invalid state and delays for the first time, to control the power supply voltage from charging the power supply terminal of the control circuit. This application can improve the voltage sampling accuracy under light and no-load conditions.
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