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AN4376 Scheda tecnica(PDF) 29 Page - STMicroelectronics

Il numero della parte AN4376
Spiegazioni elettronici  10 W wide range non-isolated high power factor LED driver using HVLED815PF
PDF  37 Pages
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Produttore elettronici  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN4376 Scheda tecnica(HTML) 29 Page - STMicroelectronics

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AN4376
PFC waveforms
37
the two resistor value allows to regulate the output current at a lower level. Here
a compromise between the output current limitation level and efficiency losses has been
selected.
7.7
Thermal measurements
To check the reliability of the design, the thermal maps have been checked with an IR
camera.
The LED driver has been stressed not only at a nominal load with 23 LEDs (Pout = 10 W)
but also at 25 LEDs, here the requested output power is increased at 10.5 W across the
input mains voltage range. Only minimum voltage range (85 VAC), maximum voltage range
(265 VAC) and the two nominal mains voltages 100/50 Hz and 230/50 Hz have been
reported.



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