SLAA898 September   2022 TAS3251 , TPA3255

1.   Abstract
2.   Trademarks
3. 1Introduction
   1. 1.1 Power Amplifiers
   2. 1.2 Discrete Power Amplifier Implementation
   3. 1.3 Class-D Amplifier Implementation
   4. 1.4 Advantage of a Class-D Implementation
4. 2Background
   1. 2.1 Why Use Constant Voltage Audio Systems
   2. 2.2 Basic Principle of Constant Voltage Systems
   3. 2.3 Power Loss in Transformer
   4. 2.4 Auto-Transformer
5. 3System Test (Based on TPA3255)
   1. 3.1 Transformer Characteristics
      1. 3.1.1 Turns Ratio and Resistance Match
      2. 3.1.2 DCR of the Transformer
   2. 3.2 System Build-Up
   3. 3.3 System Test
6. 4Efficiency Analysis and Optimization
   1. 4.1 Efficiency of Three Parts
      1. 4.1.1 Efficiency for TPA3255
      2. 4.1.2 Efficiency for Step-Up Transformer
      3. 4.1.3 Efficiency for Step-Down Transformer 330-040
   2. 4.2 Improvements on System Efficiency
      1. 4.2.1 Improve Resistance Matching
      2. 4.2.2 Apply a Transformer With Less Power Loss
7. 5Considerations on Building a Constant Voltage System
   1. 5.1 Transformer Saturation
   2. 5.2 Low DCR
   3. 5.3 Resistance Matching