Switching power supply circuit and electronic equipment

A switching power supply circuit and circuit technology, applied in electrical components, regulating electrical variables, instruments, etc., can solve the problems of large influence of circuit EMI.
CN113258789AActive Publication Date: 2021-08-13NINGBO AUX ELECTRIC
4 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Applications(China)
Current Assignee / Owner
NINGBO AUX ELECTRIC
Publication Date
2021-08-13

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention provides a switching power supply circuit and electronic equipment. The switching power supply circuit comprises a rectifying circuit, an energy storage circuit, a switching tube and a transformer; the rectifying circuit, the energy storage circuit, the transformer and the switching tube are arranged on the substrate, and the substrate is provided with the ground; and the cathode output end of the rectifying circuit and a connecting line form a power ground of the switching power supply circuit, and the power ground is electrically connected with the ground through a wire. According to the scheme provided by the invention, the grounding loop is arranged between the power ground of the switching power supply circuit and the ground, so that common-mode noise conducted to the ground through the ground distributed capacitance of the switching tube and common-mode noise conducted to the ground through the ground distributed capacitance of the secondary side of the transformer can flow back to the switching tube through the grounding loop, the influence of noise on a post-stage load or a power supply is avoided, and the interference of the switching power supply circuit is reduced.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to the technical field of switching power supplies, in particular to a switching power supply circuit and electronic equipment. Background technique

[0002] With the rapid development of frequency conversion technology, the equipment used is also pursuing faster logic circuits, and at the same time brings many electromagnetic compatibility problems. For air conditioners, greater efforts must be made to ensure the electromagnetic interference (Electro Magnetic Interference, EMI) requirements. In order to reduce EMI interference, in addition to starting from the board-level device layout, it is also necessary to dig out from the PCB grounding wiring, and this requirement will become increasingly important in the future development of electromagnetic compatibility.

[0003] Taking the switching power supply circuit as an example, there is common-mode interference between the power supply and the ground of the switching power supply...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More