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Automatic current-sharing circuit of average current of switching power supply

An average current, switching power supply technology, applied in emergency protection circuit devices, electrical components, output power conversion devices, etc., can solve problems such as failure to remove faults, poor current sharing effect, etc., and achieve a more practical effect.

Inactive Publication Date: 2013-12-04
PHICOMM (SHANGHAI) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the existence of the internal diode of the MOS tube, the current sharing effect is not good, and the fault cannot even be removed.

Method used

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  • Automatic current-sharing circuit of average current of switching power supply
  • Automatic current-sharing circuit of average current of switching power supply
  • Automatic current-sharing circuit of average current of switching power supply

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Embodiment Construction

[0025] Embodiments of the present invention are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation modes, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention.

[0026] It should be noted that the diagrams provided in this embodiment are only schematically illustrating the basic idea of ​​the present invention, and only the components related to the present invention are shown in the diagrams rather than the number, shape and shape of the components in actual implementation. Dimensional drawing, the type, quantity and proportion of each component can be changed arbitrarily during actual impleme...

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Abstract

The invention provides an automatic current-sharing circuit of an average current of a switching power supply. The automatic current-sharing circuit at least comprises an output current detecting unit, a current-sharing adjusting unit, an output voltage adjusting unit, a microprogram control unit, a current-sharing switch and a current-sharing bus. The output current detecting unit, the current-sharing adjusting unit and the output voltage adjusting unit are connected in sequence, the microprogram control unit, the current-sharing switch and the current-sharing bus are sequentially connected in an annular shape, the output current detecting unit is further connected with the microprogram control unit, and the current-sharing adjusting unit is further connected with the current-sharing switch. The automatic current-sharing circuit of the average current of the switching power supply has a load current detecting and amplifying function, a current-sharing function, an output voltage adjusting function and a bus control function and can completely eliminate the influence of a broken-down rectifier module on a system.

Description

technical field [0001] The invention relates to a current equalizing circuit, in particular to an average current automatic equalizing circuit of a switching power supply. Background technique [0002] Under the background of modern switching power supply pursuing modularization and standardization, in order to output relatively large power, especially to obtain relatively large load current, parallel connection seems to be the only way. However, due to the dispersion of the parameters of each power supply, the open circuit voltage and internal resistance of each power supply will be different. Usually the internal resistance of the switching power supply is very small, so a small difference in the open circuit voltage will cause a large difference in the output current of each power supply. This state will cause the load current of each power supply to be unbalanced, resulting in inconsistent life of each power supply, so that the reliability and stability requirements can...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M1/00H02H7/12
Inventor 吉文安杨锦辉
Owner PHICOMM (SHANGHAI) CO LTD
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