1 / 9

Power Supply Design -an introduction

Power Supply Design -an introduction. Adapted from a Presentation By Doug Miller, SPU EE Alumnus. Power Supplies Overview. Linear Regulators Switching “DC-to-DC Converter” Regulators. Linear Regulators. + Simple, inexpensive + Electrically “quiet” pure DC output Vout < Vin

gayora
Download Presentation

Power Supply Design -an introduction

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Power Supply Design-an introduction Adapted from a Presentation By Doug Miller, SPU EE Alumnus

  2. Power SuppliesOverview • Linear Regulators • Switching “DC-to-DC Converter” Regulators

  3. Linear Regulators + Simple, inexpensive + Electrically “quiet” pure DC output • Vout < Vin • Poor Efficiency e.g., if Vin = 6V, Vout = 3V, Efficiency near 50% • Can be physically large

  4. Switching Regulators • Also known as “DC-DC Converters” or “Switchmode Regulators” + Wide range of input voltages + Multiple output voltages possible + High Efficiency (often > 90% ) + Compact - Complex, more expensive - Electrically “noisy” (not pure DC)

  5. Switching RegulatorsA few types… • Buck (step-down) • Boost (step-up) • Flyback (supports multiple outputs; transformer needed) • Buck-boost (step-up or –down) • Charge Pump (no inductor)

  6. Switching RegulatorsBuck Converter – V Down only

  7. Switching RegulatorsBoost Converter – V up only

  8. Switching RegulatorsBuck-Boost – V Up or Down • What the source power fluctuates up/down past the desired output voltage? • A Buck-Boost regulator can go either way as needed • More complicated, but often worth it

  9. Design Considerations • Use linear regulators only if: • Energy conservation is not a concern • Wasted power is insignificant (less than 1 Watt) • Low noise is critical • Switching regulators are finicky • Use only the specified parts (by brand if possible) • Read and follow app note precisely • Make regulators “isolatable” with jumpers and/or fuses that can be removed

More Related