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Power supply circuit

A power supply circuit and circuit technology, which can be used in high-efficiency power electronic conversion, conversion equipment without intermediate conversion to AC, climate sustainability, etc., which can solve the problem of poor conversion efficiency of flyback converters and power loss of power supply circuits big problem

Active Publication Date: 2012-05-23
DELTA ELECTRONICS (THAILAND) PUBLIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The main purpose of the present invention is to provide a power supply circuit to solve the problem that the conversion efficiency of the flyback converter contained in the known power supply circuit is not good, which makes the power loss of the entire power supply circuit too large

Method used

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Embodiment Construction

[0026] Some typical embodiments embodying the features and advantages of the present invention will be described in detail in the description in the following paragraphs. It should be understood that the present invention is capable of various changes in different ways without departing from the scope of the present invention, and that the description and drawings therein are illustrative in nature rather than limiting the present invention.

[0027] see figure 2 , which is a circuit block diagram of a power supply circuit in a preferred embodiment of the present invention. Such as figure 2 As shown, the power supply circuit 2 of the present invention includes a first stage circuit 21 and a second stage circuit 22 . The first stage circuit 21 is used to convert the input voltage V in converted to DC voltage V DC And output to the second stage circuit 22. In this embodiment, the first stage circuit 21 may include an electromagnetic interference filter unit (EMI Unit) 211...

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Abstract

The invention discloses a power supply circuit, which comprises a first-stage circuit for converting input voltage into direct voltage, and a second stage circuit, wherein the second stage circuit comprises a main power switching circuit for converting the direct voltage into first output voltage, a first standby power switching circuit for converting the direct voltage into second output voltage, a feedback circuit for connecting the main power switching circuit and the first standby power switching circuit to generate a feedback signal according to the first and second output voltage so as to make the first standby power switching circuit adjust the second output voltage according to the feedback signal, a second standby power switching circuit for converting the first output voltage or the second output voltage into a standby power, and a power distribution circuit for outputting the first output voltage or the second output voltage to the second standby power switching circuit.

Description

technical field [0001] The invention relates to a power supply circuit, in particular to a power supply circuit for providing standby power. Background technique [0002] Nowadays, electronic technology is getting more and more advanced, and the internal structure of electronic products is becoming more and more complex. In order to meet the needs of humanization, electronic products often have a standby power supply to continuously supply and maintain the operation of some internal components of the system, such as time display and power status. It is used to drive the system first when indicating and starting up. Therefore, the standby power supply has become an indispensable part of today's electronic products. [0003] see figure 1 , which is a circuit block diagram of a conventional power supply circuit for providing standby power. As shown in the figure, the power supply circuit 1 is a two-stage circuit, which includes a first-stage circuit 11 and a second-stage circ...

Claims

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Application Information

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IPC IPC(8): H02M7/02H02M3/08
CPCY02B70/16Y02B70/10
Inventor 萨伊尤恩·萨卡达
Owner DELTA ELECTRONICS (THAILAND) PUBLIC CO LTD
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