Dimming mode dimmable led spot light

      LED lamp all welcomed by consumers, because it not only has a very long life, and has high efficiency, more important is it also adapts to the development needs of the market, have the characteristics of energy saving and environmental protection. It is also worth mentioning, dimmable led spot light, is to adjust the brightness according to the light and environmental light, it is not only more humane, as well as the best embodiment of energy-saving.
      The dimmable led spot light has three dimming method is the most common, the three dimming skills are to adjust light according to the change of the LED drive current input. According to different circuit system also can be divided into imitation dimming and PWM dimming.
      The first: the dimming method called mimic dimming method or linear dimming method. The dimming method advantage is: when the driving current linear increase or decreases, reducing the drive current overshoot effect on LED lighting chip life process, and a dimming circuit of anti-interference is strong. Its defect is size change process of driving current must have certain effects on the LED chip temperature.
      The second: to complete the LED spot light dimming by modulating the LED drive current. Because the brightness and LED chip LED drive current into a proportional relationship, so we can adjust the LED drive current control the brightness of the LED lights.
      The third: pulse width modulation (PWM). This kind of method is adjusted to make the drive current is a square wave, the variable pulse width of the pulse width modulation, through the transition for the modulation of LED lamps for light time, also changes the input power, so as to achieve energy saving, adjustable light target. Frequency around 200Hz~10KHz as usual; because the human eye visual lag, will not feel the flare light source in the light of. The dimming method is good heat dissipation performance can improve LED, defect is driving current overshoot on the LED chip's life must have certain influence. LED lamp dimming performance is one of its important characteristics, its automatic adaptive versatile dimming is any other lamps which can not be realized, it is also the focus of future development direction of one of the.

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The above article from Sourcechip official website (http://www.sc-ledlights.com/)
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