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L6751C Datasheet(PDF) 5 Page - STMicroelectronics |
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L6751C Datasheet(HTML) 5 Page - STMicroelectronics |
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5 / 57 page ![]() DocID025037 Rev 1 5/57 L6751C List of figures 57 List of figures Figure 1. Typical 6-phase application circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Figure 2. Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Figure 3. L6751C pin connections (left: top view - right: bottom view). . . . . . . . . . . . . . . . . . . . . . . . . 8 Figure 4. JMode: voltage positioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Figure 5. Device initialization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 Figure 6. Voltage positioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 Figure 7. Current reading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 Figure 8. LSLESS startup: enabled (left) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 Figure 9. LSLESS startup: disabled (right) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 Figure 10. DVID optimization circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 Figure 11. Thermal monitor connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 Figure 12. Output current vs. switching frequency in PSK mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 Figure 13. Efficiency performance with and without enhancements (DPM, GDC). . . . . . . . . . . . . . . . 43 Figure 14. ROSC vs. FSW per phase (ROSC to GND - left; ROSC to 3.3 V - right) . . . . . . . . . . . . . . . . 44 Figure 15. Equivalent control loop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 Figure 16. Control loop bode diagram and fine tuning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46 Figure 17. Device initialization: PMBus controlling VOUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .51 Figure 18. L6751C WPLGA72 6 x 6 mm package outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54 |
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