SLOA326 October   2022 TAS2781

 

  1.   Abstract
  2.   Trademarks
  3. 1Introduction
  4. 2Hybrid-Pro Boost Controller
  5. 3Hardware, Software, and Test Results
    1. 3.1 Hardware Connections
      1. 3.1.1 Schematic Connections
      2. 3.1.2 Equations
    2. 3.2 Software Settings
      1. 3.2.1 Steps To Enable Class-H Using PPC3
      2. 3.2.2 Class-H Configuration Settings
    3. 3.3 Hybrid-Pro Feature Performance Results
      1. 3.3.1 Class-H Operation
        1. 3.3.1.1 PWM Steps
        2. 3.3.1.2 Lookahead Time
        3. 3.3.1.3 Margin
        4. 3.3.1.4 Inflation Factor
      2. 3.3.2 Battery Life
      3. 3.3.3 Thermal Performance
  6. 4References

3.3.3 Thermal Performance

Figure 3-14 through Figure 3-17 are thermal images that demonstrate the improvement in efficiency of the system when running the system with class-H. The test setup was performed with an 1-kHz sine wave varying between zero and full power faded-in and faded-out repeatedly. The system was allowed to reach a stable temperature before capturing the images with a thermal camera.

Class-H operation improves system efficiency by significantly reducing thermal losses.

Figure 3-14 Boost With Class-H Disabled
Figure 3-16 Amplifier With Class-H Disabled
Figure 3-15 Boost With Class-H Enabled
Figure 3-17 Amplifier With Class-H Enabled