High voltage AC light-adjusting controller for general constant-current LED

Abstract

The invention discloses a high-voltage alternating current light adjustment controller of a universal constant-current LED, and comprises an alternating current filter, a controllable resistance dummy load unit circuit, an electronic transformer unit circuit adapted to tangential input, a boosting constant-current unit, a voltage-to-PWM conversion unit circuit, a high-voltage isolating circuit, a light adjustment signal sampling circuit and a negative terminal absorption circuit unit. A high-voltage pulse appearing in the light adjustment process is restrained and absorbed through the alternating current filter and the negative terminal absorption circuit unit, so as to control a light adjustment device; a boosting circuit is matched with the electronic transformer adapted to the tangential input, thereby solving the problem that the electronic transformer is started under low power consumption; a light adjustment signal is taken out of the photoelectric isolating light adjustment signal sampling circuit and passes through the voltage-to-PWM conversion circuit, so that the PWM light adjustment signal is delivered; therefore, the PWM light adjustment to the LED is realized under the condition that the traditional line is not changed; the light adjustment controller is to be widely applied to LED illumination.

Description

Technical field [0001] The invention relates to a dimming controller, in particular to a general constant current LED high voltage AC dimming controller. Background technique [0002] At present, the dimming objects of lights are generally incandescent lamps or halogen lamps. The dimming of incandescent lamps is performed by adjusting the dimmer composed of silicon controlled rectifiers. It is a direct high-voltage dimming method. The dimming of the halogen lamp is also adjusted by adjusting the dimmer composed of silicon controlled rectifiers to adjust the electronic transformer of the halogen lamp, and the corresponding voltage is sent out by the electronic transformer of the halogen lamp for dimming. It is a low-voltage and high-current dimming . With the emergence of low-power and energy-saving LEDs, LEDs have low voltage and energy saving, good spectrum, pure color, high luminous efficiency, and relatively little damage to the illuminated objects (such as antiques). Th...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a general-purpose constant-current LED high-voltage AC dimming controller, which can facilitate the dimming of the actual LED light source and effectively protect the dimming without changing the existing wiring mode and dimming control mode. The optical device will not be broken down by high-voltage pulses during the dimming process when it is connected to an electronic load, and it overcomes the shortcomings of the existing electronic transformer for halogen lamps that cannot be started normally and that the electronic transformer for halogen lamps cannot be connected to a high-power electronic load. By changing the way of dimming input, 1~10V dimming or human body induction energy-saving control can be realized

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