AN3256

Graphical data

Doc ID 17790 Rev 1

13/23

Figure 16.

Efficiency vs line voltage

Efficiency improves with the number of LEDs. It is better at low line voltage.

Figure 17.

Power loss vs line voltage

Power loss increases with both line voltage and number of LEDs in the load. This indicates a

series loss - both the FET resistance and the input filter choke resistance could be

contributing.