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AN4376 Datasheet(PDF) 25 Page - STMicroelectronics

Part # AN4376
Description  10 W wide range non-isolated high power factor LED driver using HVLED815PF
PDF  37 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN4376 Datasheet(HTML) 25 Page - STMicroelectronics

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AN4376
PFC waveforms
37
7.3
ILED pin modulation with the line voltage
From Figure 26 to Figure 31, the effect off the ILED pin modulation through a divider
connected to the mains is represented. The effect is a very sinusoidal shape at nominal
mains voltage 100 VAC and 230 VAC with high performance in terms of PF and THD.
Figure 26. ILED pin operation at 85 VAC
Figure 27. ILED pin operation at 100 VAC
CH1: VIN
CH2: BJT-base
CH3: ILED pin
CH4: C5 capacitor
CH1: VIN
CH2: BJT-base
CH3: ILED pin
CH4: C5 capacitor
Figure 28. ILED pin operation at 130 VAC
Figure 29. ILED pin operation at 175 VAC
CH1: VIN
CH2: BJT-base
CH3: ILED pin
CH4: C5 capacitor
CH1: VIN
CH2: BJT-base
CH3: ILED pin
CH4: C5 capacitor



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