Discussion on the LED Driver
fecha:2011-06-07 14:49
estado:para resolver
pregunta:admin
DC control
led by the current-driven devices, the brightness is proportional to forward current. There are two ways to control the forward current. The first method is to use LED VI curve to determine the current required to produce the desired positive voltage applied to the LED. The implementations generally use a voltage source and a ballast resistor. Figure 1 illustrates this approach. As described below, this method has several shortcomings. LED forward voltage will result in any change i
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