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A ripple absorbing circuit

A technology for absorbing circuits and ripples, applied in the direction of electric light sources, electrical components, electroluminescent light sources, etc., it can solve the problem of ineffectiveness, no short-circuit protection function, and ripple absorption circuits that are not compatible with triac single-stage PFC. No stroboscopic and other problems, to achieve the effect of suppressing output ripple

Active Publication Date: 2018-12-28
DONGGUAN DAEN LIGHTING CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The existing ripple absorption circuit is not compatible with the three-terminal bidirectional AC switch single-stage PFC to achieve no flicker, does not work when dimming, and has no short-circuit protection function

Method used

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  • A ripple absorbing circuit

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Embodiment Construction

[0011] The present invention will be further described below according to the accompanying drawings and specific embodiments.

[0012] like figure 1 As shown, a ripple absorption circuit includes a follower circuit with automatic adjustment function and a short circuit protection circuit, the follower circuit automatically adjusts the transistor Q3, and the short circuit protection circuit includes a resistor R1, a resistor R4, a Zener diode Z1, a transistor Q2 and Transistor Q1, one terminal of the resistor R1 is connected to the base of the transistor Q1, one terminal of the resistor R1 is connected to the base of the transistor Q2, the emitter of the transistor Q2 is connected to the collector of the transistor Q1, and the emitter of the transistor Q1 is connected to the Zener diode Z1, the collector of resistor R4 and transistor Q2, the other terminal of Zener diode Z1 is connected to the negative pole of the power supply, and the other terminal of the resistor R4 is conne...

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Abstract

The invention discloses a ripple absorbing circuit, which includes a follower circuit with an automatic adjustment function and a short-circuit protection circuit. The follower circuit automatically adjusts the triode Q3, and the short-circuit protection circuit includes a resistor R1, a resistor R4, and a voltage-stabilizing diode. Z1, transistor Q2 and transistor Q1, one terminal of resistor R1 is connected to the base of transistor Q1, one terminal of resistor R1 is connected to the base of transistor Q2, the emitter of transistor Q2 is connected to the collector of transistor Q1, and the emitter of transistor Q1 The other terminal of the Zener diode Z1 is connected to the negative pole of the power supply, and the other terminal of the resistor R4 is connected to the positive pole of the power supply. This circuit has good synchronous dimming performance with the single-stage scheme of the three-terminal bidirectional AC switch. The output short circuit does not burn the metal oxide semiconductor, and the single-stage power factor correction without dimming, and the LED drive can be input into this mode to achieve frequency-free. flash.

Description

technical field [0001] The invention relates to a ripple absorption circuit. Background technique [0002] The existing ripple absorption circuit cannot be compatible with the single-stage PFC of the three-terminal bidirectional AC switch to achieve no stroboscopic, and does not work during dimming, and has no short-circuit protection function. SUMMARY OF THE INVENTION [0003] The purpose of the present invention is to provide a ripple absorption circuit in view of the above-mentioned defects of the prior art. The circuit has good synchronous dimming with the single-stage solution of the three-terminal bidirectional AC switch, the output short circuit does not burn the metal oxide semiconductor, and the single-stage power factor correction without dimming, the LED driver can input this mode quickly and then achieve no frequency flash. [0004] In order to solve the above-mentioned defects of the prior art, the technical solution provided by the present invention is: a r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B33/08H05B44/00
CPCH05B45/50H05B45/37Y02B20/30
Inventor 蔡冰段辉华
Owner DONGGUAN DAEN LIGHTING CO LTD
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