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Power source converter having current limiting function

A power converter and function technology, applied in the field of power converters with current limiting function, can solve the problems of complex circuit theory, a large number of electronic components in current limiting circuits, hindering the development of power converters, etc., to achieve a simple circuit structure and layout area. reduction effect

Inactive Publication Date: 2009-04-29
ANHUI WANKONG SET EQUIP MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In other words, traditional current-limiting circuits often require a large number of electronic components, and the circuit theory applied is relatively complicated
Therefore, no matter in terms of miniaturization or circuit cost considerations, traditional current limiting circuits hinder the development of power converters

Method used

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  • Power source converter having current limiting function
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Embodiment Construction

[0012] figure 1 Shown is a circuit block diagram of a power converter with a current limiting function according to an embodiment of the present invention. Please refer to figure 1 , the power converter 100 includes a current limiting circuit 110 , a low pass filter 120 and a DC converter 130 . The low-pass filter 120 has an input terminal IN, an output terminal OUT and a feedback terminal FB. The DC converter 130 is coupled to the output terminal OUT, and the current limiting circuit 110 is coupled between the input terminal IN and the feedback terminal FB.

[0013] The low-pass filter 120 receives an input signal VIN through its input terminal IN, and filters out high-frequency components in the input signal VIN. Afterwards, the low-pass filter 120 transmits the filtered input signal VIN to its output terminal OUT. Accordingly, the DC converter 130 converts the filtered input signal VIN into an output signal VOUT.

[0014] Taking a closer look, the current limiting circ...

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Abstract

The invention discloses a power converter which is provided with a function of limiting current and comprises a lowpass filter, a DC converter and a current limiting circuit. The power converter uses the current limiting circuit which is connected in series with the input terminal and the feedback terminal of the lowpass filter to restrict the surge current generated when the power converter is started; wherein, the current limiting circuit consists of only a transistor and a plurality of passive elements, thus having simple circuit frame and being easy to be realized. Furthermore, the layout area of the inductor in the lowpass filter can be effectively reduced; therefore, the power converter has the advantages of micromation and low cost.

Description

technical field [0001] The present invention relates to a power converter, and in particular to a power converter with a current limiting function. Background technique [0002] With people's continuous demands on the quality of life, single-functional electronic products can no longer meet people's needs. Therefore, today's electronic products mostly use integrated circuits of different specifications to achieve the feature of integrating multiple functions into one device. Such multi-functional electronic products often need to be equipped with a power converter to convert a fixed potential voltage into the operating voltage required by each integrated circuit. [0003] A power converter is a voltage conversion circuit that utilizes the alternating charging of inductors and capacitors. It not only has a boost structure, but also has many functions such as buck, inverting, and transformer flyback. different architectures. However, regardless of the type, the power conver...

Claims

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Application Information

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IPC IPC(8): H02M3/07H02M1/32
Inventor 夏春华刘士豪
Owner ANHUI WANKONG SET EQUIP MFG