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AN4129 Datasheet(PDF) 14 Page - STMicroelectronics

Part # AN4129
Description  STEVAL-ILL044V1: 9 W Triac dimmable, high power factor
PDF  39 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN4129 Datasheet(HTML) 14 Page - STMicroelectronics

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Power converter performance
AN4129
14/39
Doc ID 023314 Rev 1
The scope shots below show the result on the input current waveform.
Figure 20.
70 Vrms input, BAT48, ~0.3 V drop
Figure 18.
70 Vrms input, no diode
Figure 19.
70 Vrms input, 1N4148, ~0.6 V drop
Trace colors:
Yellow = line voltage
Magenta = line current, 50 mA/div ref -3div
Blue = voltage at ILED pin, ref -3div
Green = LED current, 50 mA/div ref -3div
Trace colors:
Yellow = line voltage
Magenta = line current, 50 mA/div ref -3div
Blue = voltage at ILED pin, ref -3div
Green = LED current, 50 mA/div ref -3div



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