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Buck power converter

A power converter and step-down technology, applied in the direction of output power conversion device, electrical components, AC power input conversion to DC power output, etc., can solve the feedback mechanism perception, affect the flexibility of power integrated circuits, and power integration Circuits cannot be effectively used and other problems, to achieve the effect of improving flexibility

Inactive Publication Date: 2012-02-01
ADVANCED POWER ELECTRONICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the feedback resistor is configured by the user, so the power integrated circuit cannot effectively use the feedback mechanism to sense the actual power output voltage. Therefore, in some applications, if the actual power output voltage is used for calculation, then It is necessary to create an additional pin in the power integrated circuit to detect the output voltage of the power supply
[0005] In summary, it will lead to the complexity of power integrated circuits and affect the flexibility of power integrated circuits
In addition, if additional pins are made in the power integrated circuit, it will also increase the production cost

Method used

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Embodiment Construction

[0031] figure 1 It is a schematic circuit diagram illustrating a step-down power converter 100 according to an embodiment of the present invention. According to an embodiment of the present invention, the step-down power converter 100 is used to input the power supply voltage V IN Converted to the power supply output voltage V OUT , which includes a first rectification and filtering circuit 120 and a power integrated circuit 130 . The first rectification and filtering circuit 120 is used to output the intermediate voltage V LX Perform rectification and filtering, and output the intermediate voltage V LX converted to the power supply output voltage V OUT .

[0032] In addition, the power integrated circuit 130 is used to input the power supply voltage V IN converted to the output intermediate voltage V LX , which includes a voltage output pin LX and a second rectification and filtering circuit 132 . The voltage output pin LX is used to output the aforementioned output i...

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Abstract

The invention provides a buck power converter, which is used for converting a power input voltage into a power output voltage. The buck power converter comprises a first rectifier filter circuit and a power integrated circuit. The first rectifier filter circuit is used for carrying out rectification and filtering on an output intermediate voltage and converting the output intermediate voltage into a power output voltage; and the power integrated circuit is used for converting the power output voltage into the output intermediate voltage. Besides, the power integrated circuit comprises a voltage output pin and a second rectifier filter circuit. The voltage output pin is used for outputting the output intermediate voltage; and the second rectifier filter circuit, which is coupled with the voltage output pin, is used for carrying out rectification and filtering on the output intermediate voltage so as to convert the output intermediate voltage into a detection voltage, wherein the detection voltage is the same as the power output voltage.

Description

technical field [0001] The present invention relates to a power conversion circuit, and in particular to a step-down power converter. Background technique [0002] With the vigorous development of science and technology, various electronic products have emerged to meet the needs of daily life, such as computers, televisions, mobile phones... and other electronic products, and the aforementioned electronic products all need to use low-voltage and stable DC power. The generally available power source is the high-voltage AC power supply or battery DC power supply provided by the power company. Whether it is a high-voltage AC power supply or a battery DC power supply, it needs to be converted into a low-voltage and stable DC power supply through a power converter. It is used as the power source for the normal operation of the aforementioned electronic products. [0003] Therefore, almost all electronic products require a stable DC power converter to obtain a low-voltage and sta...

Claims

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Application Information

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IPC IPC(8): H02M7/217
Inventor 冯蔚文林孟宏
Owner ADVANCED POWER ELECTRONICS CORP
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