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AN4346 Fiches technique(PDF) 13 Page - STMicroelectronics

No de pièce AN4346
Description  10 W wide range - high power factor - isolated LED driver using HVLED815PF
PDF  33 Pages
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Fabricant  STMICROELECTRONICS [STMicroelectronics]
Site Internet  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN4346 Fiches technique(HTML) 13 Page - STMicroelectronics

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AN4346
Measurement results
33
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.



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