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Honor Company applies for a switching power supply patent, which can effectively improve the EMC problem of power adapters

Article Source：China National Intellectual Property Administration | Author：Financial Sector | Issuing Time：2024.05.25
On November 29, 2023, the financial sector reported that, according to the announcement of the China National Intellectual Property Administration, Honor Terminal Co., Ltd. applied for a project named "switching power supply, power adapter, charging system and charging method", with the publication number of CN117134593A, and the application date of March 2023.

The patent abstract shows that the present embodiment provides a switching power supply, power adapter, charging system, and charging method, which can effectively improve the EMC problem of the power adapter. In the switching power supply, the first control signal is used to detect the voltage and current output of the switching power supply, and feedback the voltage and current to the second control module; The second control module is used to adjust the switching frequency of the switching tube based on voltage and current; The frequency detection module is used to detect the switching frequency and send the switching frequency to the adjustment module; When the notch frequency corresponding to the detected switching frequency is the same as the current notch frequency, the adjustment module controls the filter to maintain the notch frequency corresponding to the original switching frequency; When the notch frequency corresponding to the detected switching frequency is different from the current notch frequency, the adjustment module controls the filter to adjust the notch frequency so that it is the same as the notch frequency corresponding to the current switching frequency. The filter is used to filter the harmonics in the current switching frequency.


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