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Detection circuit and switching converter using it

A switching converter and detection circuit technology, applied in the direction of measuring electrical variables, adjusting electrical variables, measuring current/voltage, etc., can solve the problems of increasing circuit area and cost, increasing the complexity of control methods, etc., to simplify circuit design and save money. The effect of removing auxiliary windings and improving system efficiency

Active Publication Date: 2021-06-08
SILERGY SEMICON TECH (HANGZHOU) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this detection method, the introduction of the auxiliary winding will increase the complexity of the control method, and at the same time increase the area and cost of the circuit

Method used

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  • Detection circuit and switching converter using it
  • Detection circuit and switching converter using it
  • Detection circuit and switching converter using it

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Embodiment Construction

[0030] The present invention is described below based on examples, but the present invention is not limited to these examples. In the following detailed description of the invention, some specific details are set forth in detail. The present invention can be fully understood by those skilled in the art without the description of these detailed parts. In order not to obscure the essence of the present invention, well-known methods, procedures, procedures, components and circuits have not been described in detail.

[0031] Furthermore, those of ordinary skill in the art will appreciate that the drawings provided herein are for illustrative purposes and are not necessarily drawn to scale.

[0032] Meanwhile, it should be understood that in the following description, "circuit" refers to a conductive loop formed by at least one element or sub-circuit through electrical connection or electromagnetic connection. When an element or circuit is said to be "connected to" another elemen...

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Abstract

The application discloses a detection circuit and a switching converter using the detection circuit. The technical solution of the embodiment of the present invention detects the output voltage of the switching converter during the first period of the switching period by coupling the detection circuit to the output capacitor of the switching converter, and detects the output voltage of the switching converter during the second period of the switching period. In the section, an output voltage detection signal is generated according to the detected output voltage, and at the same time, the detection of the zero-crossing point of the inductor current can be realized, and the auxiliary winding can be omitted, thereby effectively simplifying the circuit design and improving the system efficiency.

Description

technical field [0001] The invention relates to power electronics technology, in particular to a switching converter and a detection circuit thereof. Background technique [0002] A switching converter is a power conversion circuit that can convert an input voltage into another fixed output signal or an adjustable output signal through different forms of architecture, so it is widely used in electronic products such as mobile devices. In practical applications, switching converters usually need to detect the output voltage of the switching converter to achieve constant voltage control or overvoltage protection. For example, the switching converter generates an output voltage feedback value by sampling the output voltage, and controls the switching state of the power switch of the switching converter according to the output voltage feedback value and the reference voltage, so as to control the output voltage to maintain a desired value. In the prior art, the switching conver...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M7/217H02M3/156H02M3/335H02H7/125G01R19/175G01R19/165
CPCH02M7/217H02M3/156H02M3/33507H02H7/1252G01R19/16576G01R19/175H02M3/1582H02M1/0058Y02B70/10H02M1/0009H02M1/0025H02M1/325H02M1/32H02M3/33576
Inventor 王龙奇
Owner SILERGY SEMICON TECH (HANGZHOU) CO LTD
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