Scheda Tecnica (EVL6563S-200ZRC)SommarioFigure 1. EVL6563S-200ZRC 200W PFC demonstration board11 Basic topologies with zero-ripple current4Figure 2. Some basic topologies with zero-ripple current characteristics4Figure 3. Smoothing transformer and related currents52 Zero-ripple current phenomenon: theory6Figure 4. Coupled inductor a = k ne model under zero-ripple current conditions6Figure 5. Coupled inductor a = ne/k model under zero-ripple current conditions7Figure 6. Coupled inductor a = n model under zero-ripple current conditions83 Sensitivity of zero-ripple current condition10Figure 7. Ripple-current attenuation as a function of the error sources for various winding coupling124 Zero-ripple current phenomenon: practice13Figure 8. Examples of high-leakage magnetic structures (cross-section)13Figure 9. Two-section slotted bobbin suggested for the realization of a coupled inductor - top view14Figure 10. Two-section slotted bobbin suggested for the realization of a coupled inductor - side view14Figure 11. Partial ripple cancellation: still under compensated16Figure 12. Partial ripple cancellation: overcompensated165 Capacitor selection186 A 200 W ripple-free input current PFC pre-regulator19Figure 13. 200 W PFC pre-regulator with ripple-free input current: electrical schematic20Table 1. Bill of material21Table 2. 200 W PFC pre-regulator with ripple-free input current: electrical specification22Table 3. 200 W PFC pre-regulator with ripple-free input current: coupled inductor specification23Figure 14. Harmonic emissions and conformity to JEITA-MITI standards23Figure 15. Harmonic emissions and conformity to EN61000-3-2 standards23Figure 16. 200W PFC pre-regulator with ripple-free input current: typical performance24Figure 17. Line current and voltage @ full load (200 W) - Line current and voltage @ 115 Vac -200 W25Figure 18. Line current and voltage @ full load (200 W) - Line current and voltage @ 230 Vac -200 W25Figure 19. AC and DC winding currents nominal input voltages and full load (200 W) - AC and DC winding currents @ 115 Vac - 200 W25Figure 20. AC and DC winding currents nominal input voltages and full load (200 W) - AC and DC winding currents @ 230 Vac - 200 W25Figure 21. Conducted EMI @ Vin = 110 Vac, Pout = 100 W. Limits: EN50022 class B - precompliance EMI test @ 115 Vac - 200 W26Figure 22. Conducted EMI @ Vin = 110 Vac, Pout = 100 W. Limits: EN50022 class B - precompliance EMI test @ 230 Vac - 200 W267 Conclusions278 References28Appendix A Electrical equivalent circuit models of coupled inductors and transformers29Figure 23. Coupled inductors30Figure 24. Electrical equivalent circuit of coupled inductors31Figure 25. Model of coupled inductors with a = n (a=n model)32Figure 26. Model of coupled inductors with a = ne (a = ne model)33Figure 27. Model of coupled inductors with a = 1 (a =1 model, or T-model)33Figure 28. Model of coupled inductors with a = k ne (a = k ne model)34Figure 29. Model of coupled inductors with a = ne/k (a = ne/k model)34Appendix B Measuring transformer and coupled inductor parameters36Figure 30. Winding connections: aiding flux (left), opposing flux (right)37Revision history38Table 4. Document revision history38Dimensioni: 1,9 MBPagine: 39Language: EnglishApri il manuale
