Light-dimming driving circuit of LED lamp, light-dimming driving chip and control circuit

Abstract

The invention discloses a light-dimming driving circuit of an LED lamp, a light-dimming driving chip of the LED lamp, and a control circuit loaded by the LED. The light-dimming driving circuit comprises a filter module, a maximum voltage selection module, a first comparison module, a follower module, a second comparison module, a trigger module and a switch module; the filter module filters the analog voltage signal to obtain the DC voltage; the maximum voltage selection module obtains the maximum between the first reference voltage and the DC voltage; the first comparison module outputs a first reset signal or a second reset signal according to sampling voltage and the voltage output by the maximum voltage selection module; the follower module outputs the first low-resistance voltage andthe second low-resistance voltage according to DC voltage; the second comparison module outputs a first pulse signal or a second pulse signal according to the voltage output by the follower circuit and a second reference voltage. The light-emitting state of the LED lamp can be changed in real time through the first reset signal, the second reset signal, the first pulse signal and the second pulsesignal.

Description

Technical field [0001] The invention belongs to the field of lighting technology, and in particular relates to a dimming drive circuit of an LED lamp, a dimming drive chip of an LED lamp and a control circuit of an LED load. Background technique [0002] As a common electronic component, LED (Light Emitting Diode) lamps have been widely used in various industrial and technical fields due to their low manufacturing costs and better light-emitting effects; traditional technologies have been driven by corresponding drive circuits. Ground on or off state to control the luminous effect of the LED light, so that the LED light can change its own light-emitting state according to the actual needs of the user; the LED light will also be realized when the LED light is connected to the external power supply Its own energy storage. When the power supply connected to the LED lamp is in a critical continuous state, the electric energy stored by the LED lamp itself will also fluctuate greatly. ...

AI Technical Summary

Problems solved by technology

[0006] In view of this, the embodiment of the present invention provides a dimming driving circuit for LED lamps, a dimming driving chip for LED lamps, and a control circuit for LED loads, aiming to solve the problem of dimming LED lamps by driving circuits in traditional technical solutions. The range is small, and there is a lot of audio noise, which in turn leads to poor dimming performance of LED lights

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