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Low-power switching power supply made of time-base circuit

A technology of time-based circuit and switching power supply, which is applied in the direction of output power conversion device, DC power input conversion to DC power output, electrical components, etc., and can solve the problems of large volume and low conversion efficiency of series regulated power supply

Inactive Publication Date: 2012-08-01
魏传永
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Problems solved by technology

[0005] Purpose and beneficial effect of the invention: The low-power switching power supply made of NE555 according to the present invention is a non-isolated switching power supply, which has the advantages of small size, light weight, large power, high power conversion efficiency, and stable working performance. Advantages, it overcomes the shortcomings of series regulated power supply, such as large volume and low conversion efficiency

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  • Low-power switching power supply made of time-base circuit

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Embodiment Construction

[0013] According to attached figure 1 The schematic diagram and description of the circuit of the low-power switching power supply made with NE555 are shown, and the connection relationship between the components in each part of the circuit described in the summary of the invention, as well as the technical parameter requirements of the components described in the implementation mode The present invention can be realized by carrying out implementation.

[0014] Selection of components and their technical parameters

[0015] IC1 is the time base circuit, the model is: NE555, it is 8-pin DIP package, the function of each pin: 1 pin is the circuit ground (GND); 2 pins are the trigger terminal; 3 pins are the output terminal; Control voltage; 6-pin threshold (threshold); 7-pin is the discharge terminal; 8-pin is connected to the positive pole of the power supply (VCC);

[0016] IC2 is an operational amplifier, the model is F004B in metal package, and the circuit has 8 pins;

[...

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Abstract

The invention belongs to the technical field of electronic technology and power supply technology and relates to a low-power switching power supply made of a NE555. The switching power supply consists of a 18 VDC (Direct Current) power supply, a 9 V regulated power supply, an astable multivibrator circuit, an operational amplifier IC2, a sampling circuit and a rectification and electronic filtering circuit. The low-power switching power supply made of the NE555, which is provided by the invention, is a non-isolated switching power supply, has the advantages of small volume, light weight, high power, high power supply conversion efficiency and stable working performance, and overcomes the defects of large volume, low conversion efficiency and the like of a series regulated power supply.

Description

technical field [0001] The invention belongs to the technical field of electronic technology and switching power supply, and relates to a low-power switching power supply made with NE555. Background technique [0002] There are two main types of common DC regulated power supplies: one is series regulated power supply; the other is switching regulated power supply. The working principle and structure of the former circuit are simple, and it uses fewer components. The power conversion efficiency is high, so the switching power supply is widely used. [0003] The low-power switching power supply made of NE555 according to the present invention is a non-isolated switching power supply, which has the advantages of small size, light weight, high power, high power conversion efficiency, and stable working performance. The series-type regulated power supply has defects such as large volume and low conversion efficiency. [0004] The relevant technical content involved in the impl...

Claims

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Application Information

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IPC IPC(8): H02M3/157
Inventor 魏传永黄勇
Owner 魏传永
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