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Power Supplies

Power Supplies. By: Professor Wilmer Arellano. Acknowledgment. Switching Regulator (Texas Instruments) AN-556 Introduction to Power Supplies Microelectronic Circuits By: Sedra/Smith. Overview. Important Facts Classification AC to DC Power Supplies Diode Rectifier Filter

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Power Supplies

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  1. Power Supplies By: Professor Wilmer Arellano

  2. Acknowledgment Switching Regulator (Texas Instruments) • AN-556 Introduction to Power Supplies • Microelectronic Circuits By: Sedra/Smith

  3. Overview • Important Facts • Classification • AC to DC Power Supplies • Diode Rectifier • Filter • Voltage Regulator • DC to DC Converters • Buck Regulator • Boost Regulator • Inverting Regulator • Other Configurations

  4. Important Facts • Power Supplies now comprise a worldwide segment of the electronics market in excess of $5 billion annually. • Virtually all electronic equipments are powered by a DC power supply.

  5. Classification • AC/DC • DC/DC • DC/AC

  6. AC to DC Power Supplies

  7. Diode Rectifiers

  8. Diode Rectifiers

  9. Diode Rectifiers

  10. Filter

  11. Filter

  12. Filter

  13. Voltage Regulator

  14. Voltage Regulator

  15. Voltage Regulator • Full-wave Bridge Power Supply • Center-tap Power Supply

  16. Voltage Regulator Adjustable Positive Regulator Adjustable Negative Regulator

  17. Voltage Regulator

  18. DC to DC Converters • This type falls under the category of switching power supplies. • Switching is controlled by Pulse Width Modulation. • Popular because of high efficiency and high power density. • Obtain higher, lower, or inverting DC voltages. • Three main types of converters: • Buck Regulator • Boost Regulator • Inverting Regulator • Other Configurations

  19. DC to DC Converters • Buck Regulator • The most commonly used switching converter is the Buck, which is used to down-convert a DC voltage to a lower DC voltage of the same polarity. • This is essential in systems that use distributed power rails (like 24V to 48V), which must be locally converted to 15V, 12V or 5V with very little power loss.

  20. DC to DC Converters

  21. DC to DC Converters

  22. DC to DC Converters • BOOST REGULATOR • The Boost regulator takes a DC input voltage and produces a DC output voltage that is higher in value than the input (but of the same polarity). • The Boost regulator is shown in Figure 31, along with details showing the path of current flow during the switch on and off time.

  23. DC to DC Converters

  24. DC to DC Converters • BUCK-BOOST (INVERTING) REGULATOR • The Buck-Boost or Inverting regulator takes a DC input voltage and produces a DC output voltage that is opposite in polarity to the input. • The negative output voltage can be either larger or smaller in magnitude than the input voltage.

  25. DC to DC Converters

  26. DC to DC Converters • FLYBACK REGULATOR • The Flyback is the most versatile of all the topologies, allowing the designer to create one or more output voltages, some of which may be opposite in polarity. • Flyback converters have gained popularity in battery-powered systems, where a single voltage must be converted into the required system voltages (for example, +5V, +12V and -12V) with very high power conversion efficiency.

  27. DC to DC Converters

  28. DC to DC Converters

  29. DC to DC Converters

  30. http://www.digikey.com/product-detail/en/NMT1272SC/811-1584-5-ND/1927145http://www.digikey.com/product-detail/en/NMT1272SC/811-1584-5-ND/1927145

  31. http://www.digikey.com/product-detail/en/NMT1272SC/811-1584-5-ND/1927145http://www.digikey.com/product-detail/en/NMT1272SC/811-1584-5-ND/1927145

  32. http://www.digikey.com/product-detail/en/NMT1272SC/811-1584-5-ND/1927145http://www.digikey.com/product-detail/en/NMT1272SC/811-1584-5-ND/1927145

  33. Review • Important Facts • Classification • AC to DC Power Supplies • Diode Rectifier • Filter • Voltage Regulator • DC to DC Converters • Buck Regulator • Boost Regulator • Inverting Regulator • Other Configurations

  34. & Questions Answers

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