A power supply circuit and electronic equipment

Abstract

The invention discloses a power supply circuit and electronic equipment. The power supply circuit is applied to the electronic equipment and comprises a control module, a variable capacitance module and a direct current output module of a switching power supply, wherein the variable capacitance module is connected with the control module; the direct current output module of the switching power supply comprises an output end which is connected with the variable capacitance module; when the direct current output module of the switching power supply is in a working state, the control module controls the capacitance value of the variable capacitance module to be changed within a preset range, so that the output frequency of the direct current output module of the switching power supply is changed.

Description

technical field [0001] The invention relates to the field of electronic technology, in particular to a power supply circuit and electronic equipment. Background technique [0002] With the continuous development of science and technology, electronic technology has also developed rapidly, and there are more and more types of electronic products, and people have also enjoyed various conveniences brought by the development of science and technology. [0003] With the rapid development of electronic technology, the relationship between power electronic equipment and people's work and life is increasingly close, and electronic equipment is inseparable from a reliable power supply. In the 1980s, computer power supplies fully realized switching power supplies, and took the lead in completing computer power supplies. In the 1990s, switching power supplies entered the fields of various electronic and electrical equipment one after another. Program-controlled switches, communications,...

AI Technical Summary

Problems solved by technology

[0011] The embodiment of the present invention provides a power supply circuit and electronic equipment, which solves the technical problem in the prior art that the output ripple of the switching regulated power supply is too large, resulting in unstable operation of subsequent electrical devices

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