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AN4460 Datasheet(PDF) 5 Page - STMicroelectronics |
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AN4460 Datasheet(HTML) 5 Page - STMicroelectronics |
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5 / 54 page ![]() DocID026129 Rev 1 5/54 AN4460 List of figures 54 List of figures Figure 1. Demonstration board diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Figure 2. Power supply connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Figure 3. LED string connection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Figure 4. Schematic - LED channel 0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Figure 5. SMED state evolution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Figure 6. SMED state evolution. Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Figure 7. Dimming channel relation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 Figure 8. FW timeline evolution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 Figure 9. Console screen during startup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 Figure 10. “?” command. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 Figure 11. “st” command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 Figure 12. “pw” command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 Figure 13. Console screen for “ti” command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 Figure 14. Current regulation - 4 channels at 245 mA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 Figure 15. Current regulation - the same channels, different current setup. . . . . . . . . . . . . . . . . . . . . 37 Figure 16. Current regulation - the same channels, different dimming . . . . . . . . . . . . . . . . . . . . . . . . 37 Figure 17. String efficiency based on different current levels - 3 LEDs for each string . . . . . . . . . . . . 38 Figure 18. String efficiency based on different current levels - 6 LEDs for each string . . . . . . . . . . . . 39 Figure 19. String efficiency based on different current levels - 10 LEDs each string. . . . . . . . . . . . . . 39 Figure 20. Current regulation vs. VPW_LED: 3 LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 Figure 21. Current regulation vs. VPW_LED: 6 LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 Figure 22. Current regulation vs. VPW_LED: 10 LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 Figure 23. MOSFET gate during short-circuit - 245 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 Figure 24. MOSFET gate during short-circuit - 738 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 Figure 25. MOSFET gate during short-circuit - 1.065 A. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43 Figure 26. Schematic - STLUX385A - top . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46 Figure 27. Schematic - 4 channel LED driver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47 Figure 28. Schematic power section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48 |
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