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AN4130 Scheda tecnica(PDF) 13 Page - STMicroelectronics

Il numero della parte AN4130
Spiegazioni elettronici  LED driver using the HVLED815PF
PDF  41 Pages
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Produttore elettronici  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN4130 Scheda tecnica(HTML) 13 Page - STMicroelectronics

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AN4130
Theory of operation
Doc ID 023315 Rev 1
13/41
Where:
●
Yellow = line voltage
●
Magenta = line current, 50 mA/div ref -3div
●
Blue = Voltage at ILED pin, ref -3 div
●
Green = Voltage at bottom of 4.7 µF cap on ILED pin.
Dissipated power is also reduced at low conduction angles due to the lower RMS input
current:
Figure 17.
Power loss vs. dimmed RMS line voltage (120 V line)
Figure 18.
Output current vs. dimmed RMS line
Note that the dimming curve for the Schottky diode unit is much smoother and slightly lower
at the low end. This allows the unit to meet the requirements of NEMA SSL 6-2010, as
shown in Figure 25.



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