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AN2435 Datasheet(PDF) 3 Page - STMicroelectronics |
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AN2435 Datasheet(HTML) 3 Page - STMicroelectronics |
3 / 25 page AN2435 List of figures 3/25 List of figures Figure 1. Basic circuit of the sepic converter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Figure 2. Sepic converter when the main switch is on . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Figure 3. Sepic converter when the main switch is off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Figure 4. Inductor L1 and inductor L2 current waveform . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Figure 5. Switching frequency variation vs θ for two different input voltages. . . . . . . . . . . . . . . . . . . . 9 Figure 6. Input current in TM for sepic PFC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Figure 7. Coupled inductor of a sepic converter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Figure 8. Model of two coupled inductors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Figure 9. Equivalent current source of the sepic converter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Figure 10. Small signal model for the TM sepic converter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Figure 11. Output diode current averaged over the switching cycles . . . . . . . . . . . . . . . . . . . . . . . . . 17 Figure 12. Transformers with symmetrical structures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Figure 13. Schematic of the sepic converter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Figure 14. Efficiency chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Figure 15. Main waveform of the circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 Figure 16. Current of the inductors over one line cycle: Vin = 230 VACRMS, Pout = 65 W . . . . . . . . . . 23 Figure 17. Current of the inductors over switching cycles: Vin = 230 VACRMS, Pout = 65 W . . . . . . . . 23 Figure 18. Current of the inductors over one line cycle: Vin = 230 VACRMS, Pout = 65 W . . . . . . . . . . 23 Figure 19. Currents of the inductors over switching cycles: Vin = 230 VACRMS, Pout = 65 W . . . . . . . 23 Figure 20. Input current: 230 Vac input, 65 W output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 Figure 21. Input current: 230 Vac input, 32 W output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 |
Similar Part No. - AN2435 |
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Similar Description - AN2435 |
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