DocID025107 Rev 1

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AN4346

Measurement results

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2.4

Total harmonic distortion (THD) at nominal load

In Figure 8 is displayed the total harmonic distortion (THD) versus line voltage.

Figure 8. Total harmonic distortion (THD) versus line voltage

The THD at nominal input voltage is lower than 20%.

2.5

Driver efficiency at different LED load number

In Figure 9 is displayed LED driver efficiency versus AC line voltage at different numbers of

LEDs applied.

Figure 9. LED driver efficiency versus AC line voltage at different numbers of LEDs

applied

As shown in Figure 9 LED driver efficiency is always over 80% in all the input voltage range

also varying the number of LEDs.