AN4376 datasheet(29/37 Pages) STMICROELECTRONICS

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AN4376 Arkusz danych(PDF) 29 Page - STMicroelectronics

Numer części	AN4376

Szczegółowy opis	10 W wide range non-isolated high power factor LED driver using HVLED815PF

PDF	37 Pages

Scroll/Zoom	100%

Producent	STMICROELECTRONICS [STMicroelectronics]

Strona internetowa	http://www.st.com

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29 / 37 page

DocID025380 Rev 1

29/37

AN4376

PFC waveforms

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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