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Multi-mode light-dimming power circuit

A technology of dimming power supply and dimming control circuit, which is applied in the direction of light source, electric light source, electroluminescence light source, etc., can solve the problem of limiting the flexibility of dimming, and achieve the effect of improving convenience

Active Publication Date: 2016-08-17
LINKUN DONGGUAN SEMICON LIGHTING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a multi-mode dimming power supply circuit in view of the deficiencies of the prior art, which overcomes the fact that the LED power supply in the prior art can only use a single mode for dimming at the input end or at the output end, Defects that therefore limit dimming flexibility

Method used

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Embodiment Construction

[0018] Such as figure 1 and figure 2 As shown, the multi-mode dimming power supply circuit of the present invention includes an input rectifying and filtering circuit, a high-frequency transformer switching circuit, an output rectifying and filtering circuit, a constant current and constant voltage output dimming control circuit, and a dimming control circuit connected in sequence. The dimming control circuit is respectively connected to the input rectification filter circuit and the high-frequency transformer switching circuit, wherein the dimming control circuit includes a bias power supply circuit and a control circuit connected in sequence, and the bias power supply circuit includes a triode Q2, a zener diode D1, and a resistor R7 , resistor R27, resistor R26, polarized capacitor C18, polarized capacitor C4, diode D3 and resistor R18, the negative pole of Zener diode D1 is connected to the base of transistor Q2, the positive pole of Zener diode D1 is grounded, and polarized...

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Abstract

The invention discloses a multi-mode light-dimming power circuit. The power circuit comprises an input rectification and filtration circuit, a high-frequency voltage-transformation switching circuit, an output rectification and filtration circuit and a constant-current and constant-voltage output end light-dimming control circuit and further comprises a light-dimming control circuit, wherein the light-dimming control circuit is connected with the input rectification and filtration circuit and the high-frequency voltage-transformation switching circuit. The multi-mode light-dimming power circuit can perform LED light dimming at an input end and at an output end, a single-mode light dimming method in the prior art is completely changed, and the convenience of LED light dimming is greatly improved.

Description

technical field [0001] The invention relates to the technical field of LED power supplies, in particular to a multi-mode dimming power supply circuit. Background technique [0002] At present, there are two ways to use LED power supply to realize LED dimming in the market. One is to adjust through the signal at the input end; such as power carrier control and thyristor adjustment, and the other is to accept the control signal through the signal interface at the output end of the LED. In the prior art, the LED power supply can only be adjusted at the input end, or can only be adjusted at the output end, which limits the flexibility of dimming, so it needs to be improved urgently. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a multi-mode dimming power supply circuit in view of the deficiencies of the prior art, so as to overcome the fact that the LED power supply in the prior art can only adopt a single mode of ...

Claims

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Application Information

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IPC IPC(8): H05B33/08H05B44/00
CPCH05B45/37Y02B20/30
Inventor 廖玉柱
Owner LINKUN DONGGUAN SEMICON LIGHTING