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Circuit module, dimmable LED driving circuit and control method

A LED drive and circuit module technology, applied in the field of power electronics, can solve the problems of LED load flickering, high current ripple of thyristor dimmer, etc., and achieve the effect of reducing current ripple and avoiding flickering

Active Publication Date: 2018-05-04
SILERGY SEMICON TECH (HANGZHOU) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At the same time, when the conduction angle is small, the jitter of the conduction angle of the thyristor dimmer will cause a large current ripple and cause the LED load to flicker.

Method used

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  • Circuit module, dimmable LED driving circuit and control method
  • Circuit module, dimmable LED driving circuit and control method
  • Circuit module, dimmable LED driving circuit and control method

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Embodiment Construction

[0034] 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.

[0035] Additionally, 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.

[0036] 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 eleme...

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Abstract

The invention discloses a circuit module, a dimmable LED driving circuit and a control method. According to the technical scheme in the embodiment, when a conducting angle of a triac dimmer is smallerthan a preset value, driving current is controlled to be reduced to a current value corresponding to a conducting angle signal, the smaller conducting angle is enabled to correspond to smaller driving current, so that current ripples caused by conducting angle jitter can be effectively reduced, and the problem of LED load flashing is solved.

Description

technical field [0001] The present invention relates to power electronics technology, in particular to LED drive circuit technology, and more specifically, to a circuit module, a dimmable LED drive circuit and a control method. Background technique [0002] Thyristor dimming is a commonly used dimming method at present. The thyristor dimmer (also known as TRIAC) adopts the phase control method to realize dimming, that is, the conduction of the thyristor dimmer is controlled in every half cycle of the sine wave, and the same conduction phase angle is obtained. By adjusting the chopping phase of the thyristor dimmer, the conduction phase angle can be changed to realize dimming. [0003] In the prior art, TRIAC dimmers are usually used in combination with a linear constant current control scheme. The linear constant current control scheme adjusts the current flowing through the LED load so that it remains constant by controlling a linear device (such as a transistor in a line...

Claims

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Application Information

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IPC IPC(8): H05B33/08H05B44/00
CPCH05B45/00H05B45/37H02M1/14H02M7/15H05B45/395H05B45/10H05B45/3575Y02B20/30H05B45/31H05B45/3725H05B45/345H05B45/36
Inventor 陈惠强王建新
Owner SILERGY SEMICON TECH (HANGZHOU) CO LTD
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