Datasheet

AN3180 List of figures
Doc ID 17273 Rev 1 3/39
List of figures
Figure 1. EVL6563S-200ZRC 200W PFC demonstration board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Figure 2. Some basic topologies with zero-ripple current characteristics . . . . . . . . . . . . . . . . . . . . . . 4
Figure 3. Smoothing transformer and related currents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Figure 4. Coupled inductor a = k n
e
model under zero-ripple current conditions. . . . . . . . . . . . . . . . . 6
Figure 5. Coupled inductor a = n
e
/k model under zero-ripple current conditions. . . . . . . . . . . . . . . . . 7
Figure 6. Coupled inductor a = n model under zero-ripple current conditions . . . . . . . . . . . . . . . . . . . 8
Figure 7. Ripple-current attenuation as a function of the error sources for various winding coupling 12
Figure 8. Examples of high-leakage magnetic structures (cross-section) . . . . . . . . . . . . . . . . . . . . . 13
Figure 9. Two-section slotted bobbin suggested for the realization of a coupled inductor - top view 14
Figure 10. Two-section slotted bobbin suggested for the realization of a coupled inductor - side view14
Figure 11. Partial ripple cancellation: still under compensated . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Figure 12. Partial ripple cancellation: overcompensated . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Figure 13. 200 W PFC pre-regulator with ripple-free input current: electrical schematic. . . . . . . . . . . 20
Figure 14. Harmonic emissions and conformity to JEITA-MITI standards . . . . . . . . . . . . . . . . . . . . . . 23
Figure 15. Harmonic emissions and conformity to EN61000-3-2 standards . . . . . . . . . . . . . . . . . . . . 23
Figure 16. 200W PFC pre-regulator with ripple-free input current: typical performance . . . . . . . . . . . 24
Figure 17. Line current and voltage @ full load (200 W) - Line current and voltage @ 115 Vac -
200 W . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Figure 18. Line current and voltage @ full load (200 W) - Line current and voltage @ 230 Vac -
200 W . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Figure 19. AC and DC winding currents nominal input voltages and full load (200 W) - AC and DC
winding currents @ 115 Vac - 200 W . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Figure 20. AC and DC winding currents nominal input voltages and full load (200 W) - AC and DC
winding currents @ 230 Vac - 200 W . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Figure 21. Conducted EMI @ Vin = 110 Vac, Pout = 100 W. Limits: EN50022 class B -
precompliance EMI test @ 115 Vac - 200 W . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Figure 22. Conducted EMI @ Vin = 110 Vac, Pout = 100 W. Limits: EN50022 class B -
precompliance EMI test @ 230 Vac - 200 W . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Figure 23. Coupled inductors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Figure 24. Electrical equivalent circuit of coupled inductors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Figure 25. Model of coupled inductors with a = n (a=n model) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Figure 26. Model of coupled inductors with a = n
e
(a = n
e
model) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Figure 27. Model of coupled inductors with a = 1 (a =1 model, or T-model) . . . . . . . . . . . . . . . . . . . . 33
Figure 28. Model of coupled inductors with a = k n
e
(a = k ne model) . . . . . . . . . . . . . . . . . . . . . . . . . 34
Figure 29. Model of coupled inductors with a = n
e
/k (a = n
e
/k model) . . . . . . . . . . . . . . . . . . . . . . . . . 34
Figure 30. Winding connections: aiding flux (left), opposing flux (right). . . . . . . . . . . . . . . . . . . . . . . . 37