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

3.3.1.3 Margin

Margin can be used to add output margin to avoid audio clipping. Figure 3-9 and Figure 3-10 show the margin for the 0.85 and 0.7 setting, respectively. A margin of 0.7 provides higher headroom than a margin of 0.85, with a tradeoff with lower efficiency.

Margin of 0.85
Figure 3-9 Output Voltage Margin During PVDDH Transition
Margin of 0.7
Figure 3-10 Output Voltage Margin During PVDDH Transition