LED driving circuit having silicon controlled rectifier light modulator, circuit module and control method

A technology of LED drive and circuit module, which is applied in the field of power electronics and can solve the problems that the efficiency of the LED drive circuit system needs to be improved.

Active Publication Date: 2017-06-30
SILERGY SEMICON TECH (HANGZHOU) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the system efficiency of the existing LED driving circuit needs to be improved

Method used

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  • LED driving circuit having silicon controlled rectifier light modulator, circuit module and control method
  • LED driving circuit having silicon controlled rectifier light modulator, circuit module and control method
  • LED driving circuit having silicon controlled rectifier light modulator, circuit module and control method

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Embodiment Construction

[0066] 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.

[0067] 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.

[0068] 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 an LED driving circuit having a silicon controlled rectifier light modulator. A bleeder current of the silicon controlled rectifier light modulator at a conduction start stage in each AC period and a bleeder current after conduction and till being lightening of an LED load are distinguished, a bleeder circuit is controlled to bleed in a first relatively large current when the silicon controlled rectifier light modulator is at the conduction start stage, the bleeder circuit after conduction is controlled to bleed in a second relatively small current, an average bleeder current of the bleeder circuit in each period can be reduced, bleeder loss can be further reduced, and efficiency of the LED driving circuit is improved.

Description

technical field [0001] The invention relates to power electronics technology, in particular to an LED driving circuit with a thyristor dimmer, a circuit module and a control method. Background technique [0002] Thyristor dimming is a commonly used dimming method at present. The thyristor dimmer adopts the phase control method to realize dimming, that is, the conduction of the thyristor dimmer is controlled every half cycle of the sine wave, and the same conduction is obtained. pass angle. By adjusting the chopping phase of the thyristor dimmer, the conduction phase angle can be changed to realize dimming. [0003] The working characteristic of the Triode for Alternating Current (TRIAC) of the thyristor dimmer is that when its gate is triggered to switch the element from off to on, it needs to maintain the conduction of the element A minimum current, which may be referred to as latching current (Latching Current, or latching current). After the triac is turned on, the min...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B33/08H05B44/00
CPCH05B45/31H05B45/10H05B45/3575H05B45/345H05B45/3725H05B47/10H02J1/04H02J1/002
Inventor 陈惠强王建新
Owner SILERGY SEMICON TECH (HANGZHOU) CO LTD
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