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AN2982 Scheda tecnica(PDF) 3 Page - STMicroelectronics

Il numero della parte AN2982
Spiegazioni elettronici  This application note describes the STEVAL-ILB005V2 demonstration board equipped with the L6585DE lighting controller
PDF  31 Pages
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Produttore elettronici  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN2982 Scheda tecnica(HTML) 3 Page - STMicroelectronics

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AN2982
List of figures
Doc ID 15599 Rev 1
3/31
List of figures
Figure 1.
STEVAL-ILB005V2 demonstration board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Figure 2.
Typical application schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Figure 3.
PFC MOSFET frequencies along mains half period (fmains = 50 Hz) for various input
voltages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Figure 4.
Summary of PFC MOSFET power losses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Figure 5.
Multiplier bias points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Figure 6.
Control loop block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Figure 7.
Bode plot with simple compensation network: |Gloop|MAX < 35dB . . . . . . . . . . . . . . . . . . 12
Figure 8.
Bode plot with enhanced compensation network: |Gloop|MAX < 35 dB and
F margin > 45° . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Figure 9.
Complete EMI filter (differential mode inductors are not present in this design). . . . . . . . . 14
Figure 10.
Resonant inverter simplified schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Figure 11.
Resonance curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Figure 12.
Parameters setting block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Figure 13.
Blocking capacitor to ground topology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Figure 14.
Charge pump network and startup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Figure 15.
STEVAL-ILB005V2 schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Figure 16.
Input performance - power factor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Figure 17.
Input performance - total harmonic distortion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Figure 18.
EMI spectrum at 277 Vac . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Figure 19.
EMI spectrum at 88 Vac . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Figure 20.
Steady-state lamp parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Figure 21.
Startup sequence with open lamp protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Figure 22.
Ballast anti-choke saturation protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Figure 23.
EOL protection (positive deviation) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Figure 24.
EOL protection (negative deviation) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29



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