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AN4346 Fiches technique(PDF) 14 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) 14 Page - STMicroelectronics

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Measurement results
AN4346
14/33
DocID025107 Rev 1
2.6
Power factor at different LED load number
In Figure 10 is displayed the measured power factor (PF) at a different LED load.
Figure 10. Power factor (PF) at different LED load
As shown in Figure 10 the power factor (PF) is over 0.90 in all the input voltage range
[88 - 265] Vac also varying the number of LEDs.
2.7
Line regulation at different LED load number
In Figure 11 is displayed the measured average output current versus line voltage at
different numbers of LEDs applied.
Figure 11. Average output current versus line voltage at different numbers of LEDs
applied
The output current is varying ± 3% changing the load over all the input voltage range
[88 - 265] Vac.



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