SLOA250C July   2017  – June 2022 TAS2505 , TAS2505-Q1

 

  1.   Abstract
  2. 1Trademarks
  3. 2What are Diagnostics and Why are They Important?
  4. 3Diagnostics Features in TAS2505
    1. 3.1 Short Circuit Detection
    2. 3.2 Over-Temperature Detection
  5. 4External Diagnostics
    1. 4.1 Diagnostic Circuit #1
    2. 4.2 Communication to Host and Action
    3. 4.3 Diagnostic Circuit #2
    4. 4.4 Diagnostic Circuit #3
  6. 5Revision History

2 What are Diagnostics and Why are They Important?

Diagnostics are the ability of a system to identify an issue and communicate it back to the central host to decide what next steps need to be taken. This capability is important for automotive audio applications to ensure both the speaker and the amplifier are performing as expected. Below are some common diagnostics features:

    Open LoadVerifies that the speaker connection to the amplifier is secure
    Short CircuitIdentifies when a short to ground, short to power, or short between speaker terminals occurs in the system
    Over-TemperatureHighlights when the temperature surpasses a set limit that could cause damage
All of these features are used commonly in applications such as Automotive Cluster and Emergency Call (eCall) to ensure quality and reliability of design. The remainder of this document specifically highlights how to implement these features in the TAS2505-Q1.