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一种驱动高亮度LED的方法是采用标准的降压补偿转换器(图1)。检测电阻器R_S产生一个反馈电压V_(FB),它根据公式R_S=V_(FB)/ I_(LED)设定了需要的LED电流I_(LED)。不幸的是,大多数补偿转换器需要一个
One way to drive high-brightness LEDs is to use a standard step-down compensation converter (Figure 1). The sensing resistor R_S generates a feedback voltage V_ (FB) which sets the required LED current I_ (LED) according to the formula R_S = V_ (FB) / I_ (LED). Unfortunately, most compensation converters require one