Output circuit and switching power supply system using same

Abstract

The invention discloses an output circuit and a switching power supply system using the same. The output circuit comprises a voltage reduction circuit used for realizing voltage transformation adjustment and a switched capacitor voltage stabilizing circuit used for realizing voltage stabilization control, the signal input end of the voltage reduction circuit is used as the signal input end of thewhole output circuit; the control end of the voltage reduction circuit is electrically connected with the enabling end of the switched capacitor voltage stabilizing circuit; the signal output end of the voltage reduction circuit is electrically connected with the signal input end of the switched capacitor voltage stabilizing circuit and serves as the energy storage end of the whole output circuit,and the signal output end of the switched capacitor voltage stabilizing circuit or the wire grounding end serves as the signal input end of the whole output circuit. The output circuit provided by the invention is simple and visual in structure, the use effect is ensured, and the reliability is improved; when the circuit is applied to theswitching power supply system, the structure of the systemcan be effectively optimized, and the manufacturing cost of the system is reduced.

Description

technical field [0001] The invention relates to an output circuit and a switching power supply using the circuit, in particular, to an output circuit with high reliability and capable of realizing various forms of voltage output and a switching power supply system using the circuit, belonging to Power semiconductor technology field. Background technique [0002] As the core component of modern power conversion technology and the structural basis of various electrical mechanisms and devices, switching power supply system has been widely used in the fields of electric power, communication, transportation and industrial control. In addition, in recent years, with the continuous development and improvement of electronic power technology and industrial manufacturing level, various switching power supply systems of different types and functions have appeared one after another, and the user's technology choice space has been greatly expanded. [0003] Take the common switching cir...

AI Technical Summary

Problems solved by technology

[0004] However, during the actual application of this type of circuit system, technicians have found that such a system structure is often affected by parasitic parameters in the circuit, resulting in unstable system parameters.

Moreover, the overall electromagnetic interference of the system is serious, and the output ripple is relatively large

[0005] In addition, the existing circuit systems of this type use many components, complex internal structures, and single functions, which not only makes the overall assembly cost of the system relatively high, but also makes the circuit system in miniaturized applications are severely restricted in the

In addition, inductance devices are usually installed in the switching circuit system, which is prone to problems such as electromagnetic radiation and shielding, which will further affect the normal use of the circuit system

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