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

3.3.1.1 PWM Steps

Using Hybrid-Pro Feedback, the PWM waveform format can be configured as 16 steps, 192-kHz PWM or 8 steps, 384-kHz PWM. Here, the audio input is a 1-kHz faded-in and faded-out burst sine wave.

Without Class-H Operation
Figure 3-4 Audio Output and Boost Voltage
With Class-H Operation PWM: 16 Steps, 192 kHz
Figure 3-6 Audio Output and Boost Voltage
With Class-H Operation PWM: 8 Steps, 384 kHz
Figure 3-5 Audio Output and Boost Voltage