Linear constant current control circuit and method for LED lamp, and LED device
A technology of linear constant current and control circuit, applied in the field of linear constant current control circuit and LED device, can solve the problems of brightness change of lamps and poor environmental lighting effect, and achieve the effect of improving system efficiency
Pending Publication Date: 2018-11-16
SHENZHEN SUNMOON MICROELECTRONICS
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[0003] The purpose of the present invention is to provide a linear constant current control circuit, method and LED device for LED lamps, aiming to solve the problem that the brightness of the entire lamp will change when the line network voltage fluctuates in the existing LED lamp lighting driving technology. resulting in poor ambient lighting
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[0024] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0025] The above-mentioned linear constant current control circuit, method and LED device for LED lights adopt constant current and constant power control technology, and control the output current by detecting the voltage of the VT port, so that when the input voltage changes, the input power remains basically unchanged ; At the same time, the discharge current is controlled by detecting the voltage of the TRIAC port, so that when no thyristor dimmer is connected to the system, the TRIAC port is closed; when a thyristor dimmer is connected to the system, the TRIAC port is normally opened. The line...
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The invention belongs to the electronic circuit technical field, and provides a linear constant current control circuit and method for an LED lamp, and an LED device; the method comprises the following steps: making power compensation for an input linear power grid; carrying out constant current discharge for passing current when a silicon controlled rectifier light modulator is connected with anAC line network; disconnecting the corresponding discharge current when a silicon controlled rectifier detection module detects the light modulator is connected, thus improving the system efficiency.The method can keep the input power basically unchanged when the system input voltage changes, and drives the LED lamp via constant current output, thus solving the problems that an existing LED lampillumination driving technology will cause the whole light fixture brightness to change when the line network voltage fluctuates, and thus causing a poor environment illumination effect.
Description
technical field [0001] The invention belongs to the technical field of electronic circuits, and in particular relates to a linear constant current control circuit, method and LED device for LED lamps. Background technique [0002] In recent years, with the development of LED lighting technology, various driving technologies emerge in an endless stream, but with the continuous expansion of application fields, the requirements for driving are becoming more and more special, such as: size, conversion efficiency and other requirements And so on, are subject to the corresponding constraints. However, when the voltage of the line network fluctuates in the existing LED lamp lighting, the brightness of the entire lamp will change, resulting in poor ambient lighting effect. Contents of the invention [0003] The purpose of the present invention is to provide a linear constant current control circuit, method and LED device for LED lamps, aiming to solve the problem that the brightn...
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IPC IPC(8): H05B33/08H05B44/00
CPCH05B45/10H05B45/00Y02B20/30
Inventor 李照华符传汇郭伟峰陈克勇
Owner SHENZHEN SUNMOON MICROELECTRONICS