Stroboflash-free dimming drive circuit for LED lamp

• Main Authors: LUO YOUYUAN, DONG FUQING
• Format: Patent
• Language: Chinese; English
• Published: 10.09.2019
• Subjects: ELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR; ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR; ELECTRICITY

The utility model discloses a stroboflash-free dimming drive circuit for an LED lamp, which is used for adjusting the brightness of the LED lamp by a silicon controlled rectifier switch and comprisesan EMI anti-interference circuit, an amplifying circuit, a rectifying and filtering circuit, a series voltage division circuit, a dimming control IC, a field effect transistor Q5 and a field effect transistor Q6. The amplifying circuit is used for quickly starting the circuit and amplifying the voltage signal, so that the circuit output to the LED lamp is stable; and the series voltage division circuit is used for controlling the magnitude of output current so as to achieve the effect of adjusting the light brightness. The technical scheme provided by the utility model aims to overcome the defects of stroboflash and flicker of the existing silicon controlled rectifier dimming power supply, and provides the silicon controlled rectifier dimming power supply device capable of linearly dimming, so that the lower limit