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Power converter and current comparison feedback circuit

A power converter, current comparison technology, applied in the direction of measuring current/voltage, adjusting electrical variables, measuring electrical variables, etc., can solve the problems of large power loss detection accuracy and so on

Active Publication Date: 2020-10-30
HUAYUAN SEMICON SHENZHEN LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a power converter and a current comparison feedback circuit to solve the problems of large power loss and detection accuracy of the detection part

Method used

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  • Power converter and current comparison feedback circuit
  • Power converter and current comparison feedback circuit
  • Power converter and current comparison feedback circuit

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Embodiment Construction

[0121] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0122] The terms "first", "second", "third", "fourth", etc. (if any) in the description and claims of the present invention and the above drawings are used to distinguish similar objects and not necessarily Describe a particular order or sequence. It is to be understood that the data so used are interchangeable under appropriate circumstances such that the embodiments of the invention described herein can be practiced in sequences other than those illustrated ...

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Abstract

The invention provides a power converter and a current comparison feedback circuit, the current comparison feedback circuit can be used for forming and maintaining a reference current, and the reference current is determined according to a first current of a first resistor when a switching tube is in an on state; when the switch tube is in a turn-off state, the switch tube is turned off; and the control module is used for acquiring a second current of the first resistor and sending a feedback signal to the control module according to a comparison result of the reference current and the secondcurrent so as to utilize the feedback signal to represent whether the voltage at the two ends of the switching tube enters a target interval or not, and the target interval is matched with the 0V voltage.

Description

technical field [0001] The invention relates to the field of circuit detection, in particular to a power converter and a current comparison feedback circuit. Background technique [0002] In the switching power supply converter, taking the flyback converter as an example, its core components may include, for example, a switch tube and a transformer, and the switch tube is connected in series with the primary winding of the transformer. The switch tube is controlled by the control module. In order to realize the control of the switch tube , and other possible control requirements, it is necessary to detect the source-drain voltage of the switch tube. Among them, it is necessary to detect whether the source-drain voltage of the switch tube is close to 0V, and then judge whether to turn on the switch tube according to the detection result, and realize ZVS (Zero Voltage Switching). By this method, the purpose of reducing the turn-on loss can be achieved. [0003] In the existin...

Claims

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Application Information

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IPC IPC(8): H02M1/08H02M3/335G01R19/175
CPCH02M1/08H02M3/33561G01R19/175H02M1/0009H02M1/0058Y02B70/10
Inventor 郭春明李盛峰
Owner HUAYUAN SEMICON SHENZHEN LTD
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