TIDUA71 January   2022

 

  1.   Description
  2.   Resources
  3.   Features
  4.   Applications
  5.   5
  6. 1System Description
  7. 2System Overview
    1. 2.1 Block Diagram
    2. 2.2 Design Considerations
    3. 2.3 Highlighted Products
      1. 2.3.1 TAS6584-Q1
      2. 2.3.2 LM5123-Q1
  8. 3Hardware, Software, Testing Requirements, and Test Results
    1. 3.1 Hardware Requirements
    2. 3.2 Test Results
      1. 3.2.1 Class-H Tracking Waveform Example
      2. 3.2.2 Thermal Performance
  9. 4Design and Documentation Support
    1. 4.1 Design Files
    2. 4.2 Support Resources
    3. 4.3 Trademarks
  10. 5About the Author

Description

This reference design demonstrates a Class-H audio and tracking power supply audio subsystem. The TAS6584-Q1 audio amplifier tracks the envelope of the digital audio input and adjusts the LM5123-Q1 boost output voltage to meet the power efficiency requirements without the need for an external microcontroller. This solution leads to improved efficiency, thermal performance, and a smaller total footprint. In addition, this reference design allows for a Class-H implementation to be plug-and-play with minimal software changes to the rest of the automotive audio architechture.