Инструкции для STMicroelectronics 12 V, 150 mA non-isolated buck converter using VIPer™ Plus - VIPER06XS STEVAL-ISA115V1

Содержание

• Figure 1. STEVAL- ISA115V1 demonstration board

  1
• 1 Adapter features

  4
  • Table 1. Electrical specifications

    4
• 2 Circuit description

  4
  • Figure 2. Application schematic

    5
• 3 Bill of material

  6
  • Table 2. Bill of material

    6
• 4 Layout

  7
  • Figure 3. Layout (top)

    7
  • Figure 4. Layout (bottom)

    7
• 5 Testing the board

  8
  • 5.1 Typical waveforms

    8
    • Figure 5. Waveforms at VIN = 115 VAC, full load

      8
    • Figure 6. Waveforms at VIN = 230VAC, full load

      8
    • Figure 7. Waveforms at VIN = 80 VAC, full load

      8
    • Figure 8. Waveforms at VIN = 265 VAC, full load

      8
  • 5.2 Line/load regulation and output voltage ripple

    9
    • Figure 9. Line regulation

      9
    • Figure 10. Load regulation

      9
    • Figure 11. Output voltage ripple at 115 VAC, full load

      9
    • Figure 12. Output voltage ripple 230 VAC, full load

      9
  • 5.3 Burst mode and output voltage ripple

    10
    • Figure 13. Output voltage ripple at 115 VAC, no load

      10
    • Figure 14. Output voltage ripple at 230 VAC, no load

      10
  • 5.4 Efficiency

    10
    • Figure 15. Active mode efficiency vs. VIN and comparison with CoC4 and DOE

      11
  • 5.5 Light load performance

    11
    • Table 3. No load input power

      11
    • Table 4. Energy consumption criteria for no load

      12
    • Figure 16. PIN vs. VIN @ no load and light load

      12
    • Figure 17. Efficiency @ PIN = 1 W

      13
    • Figure 18. PIN @ POUT = 0.25 W

      13
• 6 Functional check

  14
  • 6.1 Startup

    14
    • Figure 19. Startup at VIN = 115 VAC, full load

      14
    • Figure 20. Startup at VIN = 115 VAC, full load, zoom

      14
    • Figure 21. Startup at VIN = 230 VAC, full load

      14
    • Figure 22. Startup at VIN = 230 VAC, full load, zoom

      14
  • 6.2 Overload protection

    14
    • Figure 23. Output short-circuit applied: OLP tripping

      15
    • Figure 24. Output short-circuit maintained: OLP steady-state

      15
    • Figure 25. Output short-circuit maintained: OLP steady-state (zoom)

      15
    • Figure 26. Output short-circuit removal and converter restart

      15
  • 6.3 Feedback loop failure protection

    15
    • Figure 27. Feedback loop failure protection: tripping

      16
    • Figure 28. Feedback loop failure protection: steady-state

      16
    • Figure 29. Feedback loop failure protection: steady-state zoom

      16
    • Figure 30. Feedback loop failure protection: converter restart

      16
• 7 Feedback loop calculation guidelines

  17
  • 7.1 Transfer function

    17
    • Figure 31. Control loop block diagram

      17
  • 7.2 Compensation procedure for a DCM buck

    19
• 8 Thermal measurements

  20
  • Figure 32. Thermal measurement @ VIN = 80 VAC, full load (130 mA) Rbl = 8.2 kohm

    20
  • Figure 33. Thermal measurement @ VIN = 115 VAC, full load (130 mA) Rbl = 8.2 kohm

    21
  • Figure 34. Thermal measurement @ VIN = 230 VAC, full load (130 mA) Rbl = 8.2 kohm

    21
  • Figure 35. Thermal measurement @ VIN = 265 VAC, full load (130 mA) Rbl = 8.2 kohm

    22
• 9 EMI measurements

  23
  • Figure 36. Average measurement at full load, 115 VAC

    23
  • Figure 37. Average measurement at full load, 230 VAC

    23
• Appendix A Test equipment and measurement of efficiency and light load performance

  24
  • Figure 38. Connections of the UUT to the wattmeter for power measurements

    24
  • A.1 Measuring input power

    24
    • Figure 39. Switch in position 1 - setting for standby measurements

      25
    • Figure 40. Switch in position 2 - setting for efficiency measurements

      25
• 10 References

  27
• Revision history

  28
  • Table 5. Document revision history

    28