Reference voltage control circuit and control method and ripple elimination circuit of using reference voltage control circuit

A reference voltage and control circuit technology, applied in the field of power electronics, can solve the problems of poor ripple elimination effect and low LED load output efficiency, and achieve the effect of optimizing ripple elimination effect

Active Publication Date: 2018-05-01
JOULWATT TECH INC LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of this, the object of the present invention is to provide a reference voltage control circuit, a control method and a ripple elimination circuit using the same, which are used to solve the problems in the prior art that the ripple elimination effect is not good or the output efficiency of the LED load is not high. Happening

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  • Reference voltage control circuit and control method and ripple elimination circuit of using reference voltage control circuit
  • Reference voltage control circuit and control method and ripple elimination circuit of using reference voltage control circuit
  • Reference voltage control circuit and control method and ripple elimination circuit of using reference voltage control circuit

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Embodiment Construction

[0037] Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but the present invention is not limited to these embodiments. The present invention covers any alternatives, modifications, equivalent methods and schemes made within the spirit and scope of the present invention.

[0038] In order to provide the public with a thorough understanding of the present invention, specific details are set forth in the following preferred embodiments of the present invention, but those skilled in the art can fully understand the present invention without the description of these details.

[0039] In the following paragraphs the invention is described more specifically by way of example with reference to the accompanying drawings. It should be noted that all the drawings are in simplified form and use inaccurate scales, which are only used to facilitate and clearly assist the purpose of illustrating the embodiments of t...

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Abstract

The invention discloses a reference voltage control circuit and control method and a ripple elimination circuit of using the reference voltage control circuit. The reference voltage control circuit comprises a voltage generation circuit and a reference generation circuit, wherein the voltage generation circuit receives an input voltage signal; the input voltage signal generates a voltage drop on afirst resistor to obtain initial voltage; when the initial voltage reaches first threshold voltage or after the initial voltage reaches second threshold voltage for a period of time, the voltage generation circuit outputs a first voltage signal; and the reference generation circuit receives the first voltage signal and outputs a reference voltage signal according to the first voltage signal. According to the reference voltage control circuit and control method and the ripple elimination circuit, the output efficiency of LED load and the ripple elimination effect can be optimized.

Description

technical field [0001] The invention relates to the technical field of power electronics, in particular to a reference voltage control circuit, a control method and a ripple elimination circuit using the same. Background technique [0002] At present, the LED lamp load is generally driven by converting the AC input power into DC power through the LED drive circuit. The LED drive circuit outputs DC with sinusoidal ripples. When the LED drive circuit has a power factor correction function, the output The ripple of the direct current will be larger. Such as figure 1 As shown, the prior art ripple elimination circuit is illustrated, including LED drive circuit, output capacitor C01, LED load and ripple elimination module, wherein the ripple elimination module includes op amp U01, op amp U02, capacitor C02, adjustment tube M01 The sampling resistor R01 and the output capacitor C01 are connected in parallel at both ends of the LED drive circuit. The LED is grounded through the a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B33/08H05B44/00
CPCH05B45/40H05B45/00
Inventor 刘国强任远程周逊伟
Owner JOULWATT TECH INC LTD
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