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AN4130 Datasheet(PDF) 11 Page - STMicroelectronics

Part # AN4130
Description  LED driver using the HVLED815PF
PDF  41 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN4130 Datasheet(HTML) 11 Page - STMicroelectronics

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AN4130
Theory of operation
Doc ID 023315 Rev 1
11/41
Figure 10.
Power loss vs. sinusoidal input voltage
The input current increase can now be limited to a reasonable value. There are two
consequences of this addition:
Line regulation is lost at low input voltages (the ILED pin cannot rise to regulate current).
Figure 11.
Output current vs. input voltage
Harmonic distortion is greatly reduced at low line voltage.
Figure 12.
THD vs. input voltage



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