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Switching power supply and electronic equipment

A switching power supply, main switch technology, applied in electrical components, regulating electrical variables, instruments, etc., can solve problems such as low efficiency

Active Publication Date: 2021-03-19
苏州安驰控制系统有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the existing flyback switching power supply has many disadvantages in application, such as low efficiency and poor EMC, so it can only be used in low-power occasions

Method used

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  • Switching power supply and electronic equipment
  • Switching power supply and electronic equipment
  • Switching power supply and electronic equipment

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Embodiment Construction

[0016] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. It should be understood that the specific embodiments described here are only used to explain the present application, but not to limit the present application. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

[0017] In the description of the present application, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined. Furthermore, the terms "include" and "have", as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units...

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PUM

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Abstract

The invention discloses a switching power supply. The switching power supply comprises a control circuit, a voltage transformation circuit, a first capacitor, an auxiliary switch and a main switch; the voltage transformation circuit comprises a primary side winding, a secondary side winding and an auxiliary winding, and the secondary side winding is connected with an external load; the control endof the auxiliary switch is connected with the control circuit, and the auxiliary switch is conducted under the control of the control circuit so as to form an auxiliary loop with the auxiliary winding and the first capacitor, so that the voltage at the two ends of the main switch is reduced; and the control end of the main switch is connected with the control circuit, and the control circuit controls the main switch to be switched on when the voltage at the two ends of the main switch is reduced to a set value so as to form an input loop with the primary winding to supply power to the external load. According to the switching power supply provided by the invention, the voltage stress requirement of each component in the switching power supply can be well reduced. The invention further discloses electronic equipment.

Description

technical field [0001] The present application relates to the technical field of integrated circuits, in particular to a switching power supply and electronic equipment. Background technique [0002] The flyback topology switching power converter is widely used due to its simple circuit topology, small number of components, small size, and low cost. However, the existing flyback switching power supply has many disadvantages in application, such as low efficiency and poor EMC, so it can only be used in low power applications. Therefore, there is a need for a technical solution that can improve system efficiency and reduce stress requirements of components. Contents of the invention [0003] The technical problem mainly solved by this application is to provide a switching power supply and electronic equipment, which can reduce the voltage stress requirements on electronic components. [0004] In order to solve the above technical problems, a technical solution adopted by t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/335
CPCH02M3/33569Y02B70/10
Inventor 刘志军
Owner 苏州安驰控制系统有限公司