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Sublimity Audio Stereo Class-D Audio Amplifier

Sublimity Audio Stereo Class-D Audio Amplifier. Authors Joe Baird Luke Raynor Aaron Taylor. Advisor Dr. Osterberg Industry Representative Mr Mike Desmith Intel. Introduction. Why Class-D? Higher Efficiency amplifier Important to mobile electronics

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Sublimity Audio Stereo Class-D Audio Amplifier

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  1. Sublimity AudioStereo Class-D Audio Amplifier Authors Joe Baird Luke Raynor Aaron Taylor • Advisor • Dr. Osterberg • Industry Representative • Mr Mike Desmith • Intel University of Portland School of Engineering

  2. Introduction • Why Class-D? • Higher Efficiency amplifier • Important to mobile electronics • Efficiency  less heat  smaller size University of Portland School of Engineering

  3. Important Things to Note • Reasons Class-D is so efficient • Basic idea behind the amplifier • Importance of proper layout University of Portland School of Engineering

  4. Simple Class AB Amp University of Portland School of Engineering

  5. Simple Class-D Amp University of Portland School of Engineering

  6. Pulse Width Modulation University of Portland School of Engineering

  7. Commercial Class-D Amp Specifications VS Sublimity Audio Class-D Amp University of Portland School of Engineering

  8. Getting Started • Researched amp design • Broke the project down into individual groups • Each member focused on specific part University of Portland School of Engineering

  9. Building and Testing • Built each unit independently • Each unit was tested/debugged until successful • Individual units were integrated together to build full amp design University of Portland School of Engineering

  10. Block Diagram University of Portland School of Engineering

  11. Schematic Diagram University of Portland School of Engineering

  12. A Single Channel University of Portland School of Engineering

  13. Preamplifier/Filter University of Portland School of Engineering

  14. Output Filters University of Portland School of Engineering

  15. Frequency Response University of Portland School of Engineering

  16. Results University of Portland School of Engineering

  17. Wrap It Up • Class-D amps are way more efficient • EMI on a breadboard is a nightmare • Future release would be surface mounted University of Portland School of Engineering

  18. Crank the Tunes! University of Portland School of Engineering

  19. Thanks for listening Mundorf provided the output filter components. Visit them at www.mundorf.com International Rectifier provided the gate driver and MOSFET components.  Visit them at www.irf.com Any questions? Great appreciation is given to the following sponsors: Texas Instruments provided the PWM controller. Visit them at www.ti.com Linear Technology provided the simulation software necessary to test the design: LTSpice/SwCad III Download your free copy at www.linear.com University of Portland School of Engineering

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