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AN4376 Scheda tecnica(PDF) 4 Page - STMicroelectronics |
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AN4376 Scheda tecnica(HTML) 4 Page - STMicroelectronics |
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4 / 37 page ![]() List of figures AN4376 4/37 DocID025380 Rev 1 List of figures Figure 1. EVLHVLED815W10A demonstration board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Figure 2. Flyback (FL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Figure 3. Buck-boost topology (BB) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Figure 4. TM (transition mode) flyback currents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Figure 5. TM (transition mode) buck-boost currents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Figure 6. TM (transition mode) flyback waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Figure 7. TM (transition mode) buck-boost waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Figure 8. ILED pin modulation with the input mains voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Figure 9. EVLHVLED815W10A demonstration board schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Figure 10. Top side . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Figure 11. Bottom side. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Figure 12. LED current vs. AC line voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Figure 13. Power factor vs. AC line voltage at nominal load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Figure 14. Total harmonic distortion vs. AC line voltage at nominal load . . . . . . . . . . . . . . . . . . . . . . 17 Figure 15. Efficiency vs. AC line voltage at nominal load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Figure 16. Line regulation at different LED load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Figure 17. Power factor versus AC line voltage at different LED load . . . . . . . . . . . . . . . . . . . . . . . . . 20 Figure 18. THD versus AC line voltage at different LED load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Figure 19. Efficiency versus AC line voltage at different LED load . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 Figure 20. Input and output PFC waveforms at 100 VAC - 50 Hz - PF = 0.9889 . . . . . . . . . . . . . . . . 23 Figure 21. Input and output PFC waveforms at 230 VAC - 50 Hz - PF = 0.9211 . . . . . . . . . . . . . . . . 23 Figure 22. Transition mode operation at 100 VAC - 50 Hz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 Figure 23. Transition mode operation at 100 VAC - 50 Hz -zoom of signals . . . . . . . . . . . . . . . . . . . . 24 Figure 24. Transition mode operation at 230 VAC - 50 Hz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 Figure 25. Transition mode operation at 230 VAC - 50 Hz - zoom of signals . . . . . . . . . . . . . . . . . . . 24 Figure 26. ILED pin operation at 85 VAC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 Figure 27. ILED pin operation at 100 VAC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 Figure 28. ILED pin operation at 130 VAC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 Figure 29. ILED pin operation at 175 VAC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 Figure 30. ILED pin operation at 230 VAC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 Figure 31. ILED pin operation at 265 VAC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 Figure 32. Startup at 100 VAC - 50 Hz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 Figure 33. Startup at 230 VAC - 50 Hz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 Figure 34. Load disconnection at 100 VAC - 50 Hz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 Figure 35. No load behavior at 100 VAC - 50 Hz. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 Figure 36. Load disconnection at 230 VAC - 50 Hz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 Figure 37. No load behavior at 230 VAC - 50 Hz. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 Figure 38. Short-circuit of the output connector at 100 VAC - 50 Hz . . . . . . . . . . . . . . . . . . . . . . . . . . 28 Figure 39. Short-circuit removal at 100 VAC - 50 Hz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 Figure 40. Short-circuit of the output connector at 230 VAC - 50 Hz . . . . . . . . . . . . . . . . . . . . . . . . . . 28 Figure 41. Short-circuit removal at 230 VAC - 50 Hz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 Figure 42. Top side thermal map with 23 LED load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 Figure 43. Bottom side thermal map with 23 LED load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 Figure 44. Top side thermal map with 25 LED load - 10.5 W output . . . . . . . . . . . . . . . . . . . . . . . . . . 32 Figure 45. Bottom side thermal map with 25 LED load - 10.5 W output . . . . . . . . . . . . . . . . . . . . . . . 33 Figure 46. Measurement at 100 VAC, 50 Hz, PIN = 10.95 W, POUT = 9.5 W, PF = 0.9880. . . . . . . . . 34 Figure 47. Measurement at 230 V, 50 Hz, PIN = 10.88 W, POUT = 9.48 W, PF = 0.9220 . . . . . . . . . . 34 Figure 48. 100 VAC and 23 LED load - phase. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 |
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