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AN3111 датащи(PDF) 4 Page - STMicroelectronics

номер детали AN3111
подробное описание детали  18 W single-stage offline LED driver
PDF  23 Pages
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
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AN3111 датащи(HTML) 4 Page - STMicroelectronics

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List of figures
AN3111
4/23
Doc ID 16815 Rev 2
List of figures
Figure 1.
18 W single-stage offline LED driver board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Figure 2.
Block diagram for the L6562A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Figure 3.
Schematic diagram of the single-stage LED driver. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Figure 4.
Illustration of key waveforms of the converter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Figure 5.
Inductor current and multiplier input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Figure 6.
Input voltage and input current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Figure 7.
LED voltage and LED current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Figure 8.
Switching waveform of MOSFET Q1: conclusions when Vout > Vin . . . . . . . . . . . . . . . . . 11
Figure 9.
Switching waveform of MOSFET Q1: conclusions when Vout < Vin . . . . . . . . . . . . . . . . . 11
Figure 10.
STEVAL-ILL027V2 schematic diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Figure 11.
Output LED current and voltage for input voltage 230 V / 50 Hz . . . . . . . . . . . . . . . . . . . . 17
Figure 12.
Output LED current and voltage for input voltage 180 V / 50 Hz . . . . . . . . . . . . . . . . . . . . 17
Figure 13.
Output LED current and voltage for input voltage 260 V / 50 Hz . . . . . . . . . . . . . . . . . . . . 18
Figure 14.
Open load measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Figure 15.
Short-circuit measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Figure 16.
EMI measurement - detector average . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Figure 17.
EMI measurement - detector quasi-peak . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Figure 18.
LED current vs. input voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Figure 19.
Efficiency vs. input voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Figure 20.
LED current vs. LED number . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21



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