SLAAEU9 June   2026 TAS5805M , TAS5825M , TAS5827 , TAS5828M

 

  1.   1
  2.   Abstract
  3. 1Maximum Non-Clipping Voltage Output by Class-D Amplifiers
  4. 2Distortion Introduced at the Analog Stage
    1. 2.1 Clipping Distortion Caused by Low PVDD
    2. 2.2 Distortion Due to Insufficient PVDD Power Supply
    3. 2.3 Distortion Caused by Insufficient Class-H Boosting
    4. 2.4 Clipping Distortion Caused by Cycle-By-Cycle Current Limiting
  5. 3Signal Distortion in the DSP Digital Domain
    1. 3.1 Distortion Caused by Digital Overflow
    2. 3.2 Distortion Caused by Clipper Module Clipping
    3. 3.3 Clipping/Distortion Caused by Incorrect Sample Rate Setting
  6. 4Summary
  7. 5References

Abstract

This document was translated from a simplified Chinese source. (ZHCAG97)

TI Class-D audio power amplifier ICs are widely used in consumer electronics and automotive applications due to their high performance, high efficiency, and high fidelity. Among them, flagship products such as the TAS58xx series are extensively utilized in TVs, speakers, soundbars, party boxes, and other fields. The TAS58xx series represents advanced closed-loop architecture Class-D amplifiers introduced by TI for the consumer electronics sector. Compared to open-loop Class-D amplifiers, the closed-loop Class-D architecture significantly reduces distortion by correcting errors introduced by the power stage, filter stage, and non-linear switching. The THD+N of a closed-loop Class-D amplifier is much lower than that of an open-loop Class-D amplifier. Properly designing and applying TI's closed-loop TAS58xx can yield a high-fidelity audio system. There are many stages in a Class-D power amplifier where distortion can be introduced. The most common ones are non-linearity in the power stage and distortion during digital signal processing. This paper briefly explores the basic principles of common distortions, as well as the factors that may cause distortion when designing an audio power amplifier system and their corresponding solutions.