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
CN107995747BActive Publication Date: 2019-11-12SILERGY SEMICON TECH (HANGZHOU) CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SILERGY SEMICON TECH (HANGZHOU) CO LTD
Publication Date
2019-11-12

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Abstract

The invention 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 drive current to decrease to a current value corresponding to the conduction angle signal when the conduction angle of the thyristor dimmer is smaller than a preset value, so that the smaller The conduction angle corresponds to a smaller driving current, so that the current ripple caused by the conduction angle jitter can be effectively reduced, and the problem of LED load flickering can be avoided.
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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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