Generally, people may think that the LED downward light reduces the output power of the constant current source, so it is impossible to cause the power consumption of the step-down constant current source to increase and the temperature rise to increase. The forward voltage drop caused by lowering the forward current lowers the buck ratio. The efficiency of the step-down constant current source is related to the step-down ratio. The higher the step-down ratio is, the lower the efficiency is, and the greater the power loss on LED chip Accurate dimming cannot be achieved by adjusting the forward current, because the forward current and the LED light output are not fully proportional, and different LEDs will have different forward current and light output curves. 

0.32 inch <a href="http://www.xlitx.com/datasheet/3321AS.pdf" style="color: #333;">3321AS</a> LED Common-Cathode CC <a href="http://www.lanpade.com/7-segment-led-dot-matrix/3321as.html" style="color: #333;">3321AS</a> 7-Segment digit <a href="http://www.xlitx.com/datasheet/3321BS.pdf" style="color: #333;">3321BS</a> Display <a href="http://www.lanpade.com/7-segment-led-dot-matrix/3321bs.html" style="color: #333;">3321BS</a> Common-Anode CA
0.32 inch <a href="http://www.xlitx.com/datasheet/3231AH.pdf" style="color: #333;">3231AH</a> LED Common-Cathode CC <a href="http://www.lanpade.com/7-segment-led-dot-matrix/3231ah.html" style="color: #333;">3231AH</a> 7-Segment digit <a href="http://www.xlitx.com/datasheet/3231BH.pdf" style="color: #333;">3231BH</a> Display <a href="http://www.lanpade.com/7-segment-led-dot-matrix/3231bh.html" style="color: #333;">3231BH</a> Common-Anode CA

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