Dimmer control circuit, method and system
A technology for controlling circuits and dimmers, applied to light sources, electric light sources, electrical components, etc., can solve problems such as light source flickering, and achieve the effect of overcoming light source flickering
Active Publication Date: 2022-04-12
DELTA ELECTRONICS INC
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- Application Information
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Problems solved by technology
At this time, a large transient voltage will be generated at the moment when the dimmer is turned on, and the input current will generate a ringing, which makes the minimum current less than the minimum holding current of the dimmer, thus causing the dimmer to turn on immediately after the dimmer is turned on. Turn off, make the light source blink
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[0063] Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete and will fully convey the concept of example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided in order to give a thorough understanding of embodiments of the present disclosure. However, those skilled in the art will appreciate that the technical solutions of the present disclosure may be practiced without one or more of the specific details, or other methods, components, devices, steps, etc. may be adopted. In other instances, well-known technical solutions have not bee...
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The present disclosure provides a dimmer control circuit, method and system. The circuit includes: a rectification circuit, coupled to the voltage output terminal of the dimmer, for rectifying the output voltage of the dimmer and outputting a rectified voltage; an input voltage detection circuit, whose input terminal is coupled to the rectification circuit, for Output detection voltage; processor, whose input terminal is coupled to the output terminal of the input voltage detection circuit, and is used to output control when the detection voltage meets a preset condition; signal; constant current circuit, whose control terminal is coupled to the output of the processor terminal, the output terminal of the constant current circuit is coupled to the rectifier circuit, and the constant current circuit is used to output or stop outputting a preset current to the rectifier circuit in response to a control signal, wherein the current value of the preset current is greater than the maintaining current of the dimmer. The present disclosure can prevent the dimmer from being turned off abnormally by providing the compensation current for the dimmer, and can avoid the flickering of the light source when the dimmer is turned on.
Description
technical field [0001] The present disclosure relates to the technical field of power supply circuits, in particular, to a dimmer control circuit, method and system capable of providing compensation current for the maintenance current of the dimmer. Background technique [0002] With the development of LED technology, the dimmer control circuit used in the lighting field has also been improved. In order to make the dimmer work with the LED power supply, it is necessary to ensure that the operating current of the LED power supply is greater than the maintenance current of the dimmer. [0003] figure 1 It is a circuit diagram of a dimmer control circuit in the related art. refer to figure 1 , the input alternating current is rectified by diodes D1 and D2 to obtain a full-wave voltage, and the full-wave voltage is transmitted to the gate of the field effect transistor Q1 through the resistor R3 to turn on the field effect transistor Q1, and through the current limiting resis...
Claims
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IPC IPC(8): H05B45/10H05B45/345H05B45/59
CPCH05B45/37H05B45/00H05B45/3575H05B45/31H05B45/10H05B45/3725H05B39/045
Inventor 傅小平包宇刚陈林伟章兴华
Owner DELTA ELECTRONICS INC