In the last PWM discussion, we devised how is composed the average current, specially when the PWM frequency is faster than it should be, making the period duration comparable with the rise and fall slopes duration of the current. The results were packed up in 2 equations to summarize what is the best choice for … Continue reading Dimming LEDs (part 3/3) – The overlooked boundaries
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Dimming LEDs (part 2/3) – Sneaky non-linear events while using the PWM technique
In the previous article we tried to analyze what is the Contrast Ratio in a LED driver and how the non-idealities are giving a boundary on the minimum allowable PWM period. That was quite worth a full article, but a big part was indeed missing. Here we will go through how the PWM period and … Continue reading Dimming LEDs (part 2/3) – Sneaky non-linear events while using the PWM technique
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