Leakage circuit, leakage current control method and LED (Light Emitting Diode) control circuit

A technology of discharging current and discharging circuit, which is applied in the field of discharging circuit, controlling method of discharging current and LED control circuit, can solve problems such as adverse influence on system reliability, increased cost, low efficiency, etc., and achieves improvement of system efficiency and System reliability, reduced power consumption, and the effect of reduced power consumption

Active Publication Date: 2017-01-25
JOULWATT TECH INC LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the need to ensure that the input current is not less than VREF0/R02, this solution has disadvantages such as

Method used

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  • Leakage circuit, leakage current control method and LED (Light Emitting Diode) control circuit
  • Leakage circuit, leakage current control method and LED (Light Emitting Diode) control circuit
  • Leakage circuit, leakage current control method and LED (Light Emitting Diode) control circuit

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Embodiment Construction

[0031] 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.

[0032] 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.

[0033] 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 leakage circuit, a leakage current control method and an LED (Light Emitting Diode) control circuit. The scheme provided by the invention can be applied to a linear driving scheme; threshold voltage is a zero-crossing value; when input voltage is zero-crossing, load current is zero; leakage current is generated so that input current is greater than maintaining current of a controllable silicon light modulator, and conduction of the controllable silicon light modulator is maintained; second time is used as delaying time so that power consumption is reduced; and under the condition of guaranteeing a light modulation effect, the leakage current is reduced and the system efficiency and the system reliability are improved.

Description

technical field [0001] The invention relates to the technical field of power electronics, in particular to a discharge circuit, a discharge current control method and an LED control circuit. Background technique [0002] Because LED lamps are more energy-saving and environmentally friendly than traditional fluorescent lamps and incandescent lamps, LED lamps are slowly replacing existing fluorescent lamps and incandescent lamps. In incandescent lamps with thyristor dimmers, it is also desirable to use LED lamps to replace them, so LEDs must be compatible with thyristor dimmers. However, in the application of LED lamps to replace incandescent lamps, due to the large voltage change rate (dv / dt) at the output terminal voltage when the thyristor is turned on, it will cause a large wave at the input terminal. inrush current. This surge current has a large oscillation amplitude and short duration, which can easily cause the thyristor to be turned off by mistake, affect the stable...

Claims

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Application Information

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IPC IPC(8): H05B33/08H05B44/00
CPCH05B45/00H05B45/37Y02B20/30
Inventor 刘国强白浪张军明黄必亮任远程周逊伟
Owner JOULWATT TECH INC LTD
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