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An ac/dc converter for low power microcircuit system

A converter and microcircuit technology, applied in the field of microcircuits, can solve the problems of not being able to output low voltage, unable to adapt to the changing demands of power, etc., so as to achieve the effect of ensuring circuit safety.

Active Publication Date: 2022-05-13
ZHUZHOU HONGDA MICROELECTRONICS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, the inventors found that the existing AC / DC converters still have relatively large defects in safety protection and feedback control, especially in the application of low-power microcircuits, the existing AC / DC converters cannot adapt to power changes demand, can not output stable low voltage

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  • An ac/dc converter for low power microcircuit system
  • An ac/dc converter for low power microcircuit system
  • An ac/dc converter for low power microcircuit system

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Embodiment Construction

[0024] In the following, the invention will be further described in conjunction with the accompanying drawings and specific embodiments.

[0025] Before introducing various embodiments, the basic concept of switching power supply is firstly introduced, so as to have a better understanding of related prior art and improvements of the present invention.

[0026] Switching power supply is a power supply that uses modern power electronics technology to control the on and off of the power tube, and adjusts the on-off time ratio according to the feedback signal to keep the output stable.

[0027] According to the control method, the switching power supply mainly realizes stable output by adjusting the conduction duty cycle of the power MOS. There are two ways to adjust the duty cycle:

[0028] Pulse Width Modulation (PWM): It is to keep the switching frequency of the switch tube constant, and adjust the duty cycle by changing the conduction time, so as to achieve the purpose of sta...

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Abstract

The present invention proposes an AC / DC converter for a low-power microcircuit system, including an input circuit, a conversion circuit, an output circuit, a sampling circuit, a power factor correction circuit, a feedback circuit, a pre-control circuit, a first protection circuit and a second protection circuit. Two protection circuits; the first protection circuit is connected to the input circuit, the second protection circuit is connected to the output circuit and the feedback circuit; the feedback circuit includes a first feedback branch and a second feedback branch; the first feedback branch is connected to the first protection circuit, The second feedback branch is connected to the second protection circuit; the front control circuit is connected to the input circuit and the transformation circuit. The power factor correction circuit is connected to the output circuit, and is used to detect the power of the load device connected to the output circuit so as to correct the output voltage detected by the second protection circuit. The converter of the invention adopts the cooperation of multiple protection circuits and multiple feedback circuits, which can stabilize the output voltage and ensure the safe operation of the converter.

Description

technical field [0001] The invention belongs to the technical field of microcircuits, and in particular relates to an AC / DC converter used in a low-power microcircuit system. Background technique [0002] AC / DC converter, also known as AC / DC switching power supply or AC / DC switching circuit, converter, conversion circuit, etc., hereinafter referred to as switching power supply. [0003] Switching power supply is a power electronic device that is widely used in consumer electronics such as mobile phones and MP3, as well as aerospace and other fields. This is because the electronic system needs the power system to provide energy. Most of the electric energy in daily life comes from the mains (high voltage alternating current). However, electronic systems have different requirements for power supplies. For example, current small electronic systems often require low-voltage DC power supplies of 1V to 5V for power supply. Therefore, under normal circumstances, the commercial p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M7/217H02H7/125
CPCH02M7/217H02H7/125H02H7/1252
Inventor 彭俊新李光李启波王慧卉
Owner ZHUZHOU HONGDA MICROELECTRONICS TECH CO LTD