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

3.1.1 Schematic Connections

The connections for the Hybrid-Pro PWM output (PWM_CTRL pin) of the TAS278x and the FB pin of the boost converter are shown in Figure 3-1. The boost converter chosen for the TAS278x EVM is TPS61089. The passive 2nd order low-pass filter converts the PWM signal from the audio amplifier into a DC voltage at the FB pin of the boost converter to control the boost output.

Figure 3-1 Hardware Connections