AN3111

STEVAL-ILL027V2 demonstration board

Doc ID 16815 Rev 2

17/23

3.4

Measurement

Figure 11

, 12 and 13 show output LED current and voltage waveforms. The LED current is

slightly changed with input voltage, because it is 354 mA for 230 V, 318 mA for 180 V and

358 mA for 260 V. The LED current vs. input voltage characteristic is demonstrated in

Figure 18

.

Figure 11.

Output LED current and voltage for input voltage 230 V / 50 Hz

Figure 12.

Output LED current and voltage for input voltage 180 V / 50 Hz