Switching type stabilized voltage supply circuit

Abstract

The invention relates to a switching type stabilized voltage supply circuit. Although a traditional linear stabilized voltage supply is simple in circuit structure and reliable in operation, the traditional linear stabilized voltage supply has the defects of being low in efficiency, large in size, large in copper consumption and iron consumption, high in working temperature, small in adjusting range and the like. The switching type stabilized voltage supply circuit comprises a control circuit, a rectifying filter circuit, a high-frequency exchange circuit and a pulse-width modulation square-wave rectifying filter circuit. The control circuit is composed of a sampling circuit, a comparison circuit and a pulse-width modulation circuit, the sampling circuit, the comparison circuit and the pulse-width modulation circuit are sequentially connected in series, the pulse-width modulation circuit is in series connection with an oscillating circuit, the comparison circuit is in series connection with a reference voltage circuit, the sampling circuit of the control circuit is connected with the pulse-width modulation square-wave rectifying filter circuit, efficiency of the pulse-width modulation circuit, the high-frequency exchange circuit and the switching type stabilized voltage supply circuit can reach more than 85%, and the stabilized voltage range is wide. In addition, the switching type stabilized voltage supply circuit has the advantages of being high in voltage stabilizing precision, free of a power transformer and the like.

Description

technical field [0001] The invention relates to a switch type stable power supply circuit. Background technique [0002] Although the traditional linear regulated power supply has a simple circuit structure and reliable operation, it has disadvantages such as low efficiency (only 40% -50%), large volume, large consumption of copper and iron, high operating temperature and small adjustment range. Contents of the invention [0003] The technical problem solved by the invention is to provide a switch-type stable power supply circuit with an efficiency of more than 85%, a wide range of voltage regulation, high precision of voltage regulation, and no power transformer. [0004] In order to solve the above-mentioned technical problems, the technical scheme adopted by this new model is as follows: [0005] A switch-type stable power supply circuit, which is special in that it includes a control circuit, a rectification and filtering circuit, a high-frequency switching circuit, a...

AI Technical Summary

Problems solved by technology

[0002] Although the traditional linear regulated power supply has a simple circuit structure and reliable operation, it has disadvantages such as low efficiency (only 40% -50%), large volume, large consumption of copper and iron, high operating temperature and small adjustment range.

Images