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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 problems such as large circuit loss, lower system efficiency, and affect system performance, and achieve the effect of reducing system loss and improving system efficiency

Active Publication Date: 2020-05-12
SILERGY SEMICON TECH (HANGZHOU) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This results in large circuit losses, greatly reducing system efficiency
At the same time, the temperature of the circuit will be increased due to the heating of the bleeder circuit, which will further affect the system performance.

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

[0027] 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. It is without the description of these details that those skilled in the art can fully understand the present invention. 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.

[0028] Furthermore, those of ordinary skill in the art will appreciate that the drawings provided herein are for illustration purposes and are not necessarily drawn to scale.

[0029] At the same time, it should be understood that in the following description, "circuit" refers to a conductive loop composed of 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...

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Abstract

The application discloses a circuit module, a dimmable LED driving circuit and a control method. The technical solution of the embodiment of the present invention controls the DC bus voltage during the discharge period to be constant, and makes the expected value of the DC bus voltage adjustable, so that when the conduction angle is large, the conduction time can be postponed. When the thyristor dimmer is turned on, the DC bus voltage can be near the lighting voltage, and there is no need to discharge it for a long time after it is turned on. Thus, the system loss is effectively reduced and the system efficiency is improved.

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. Thyristor dimmer (also known as TRIAC) adopts phase control method to realize dimming, that is, control the conduction of the thyristor dimmer every half cycle of the sine wave to obtain the same conduction phase angle. 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. A linear constant current control scheme regulates the current flowing through the LED load so that it remains constant by controlling a linear device (such as a transistor in a linear state) in substantial...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B45/30H05B44/00
CPCH05B45/395H05B45/10H05B45/3575Y02B20/30
Inventor 王建新陈惠强
Owner SILERGY SEMICON TECH (HANGZHOU) CO LTD