SLAAEI4 August   2024 TAC5111-Q1 , TAC5212-Q1 , TAC5311-Q1 , TAC5312-Q1 , TAC5411-Q1 , TAC5412-Q1 , TAD5212-Q1

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2Signal Processing Chain
  6. 3Distortion Limiter
    1. 3.1 Distortion Limiter Parameters
      1. 3.1.1 Threshold Maximum
      2. 3.1.2 Threshold Minimum
      3. 3.1.3 Inflection Point
      4. 3.1.4 Slope
      5. 3.1.5 Attack Rate
      6. 3.1.6 Release Rate
      7. 3.1.7 Hold Counter
    2. 3.2 Limiter Response
  7. 4Brown-Out Protection
    1. 4.1 Brown-Out Protection Parameters
      1. 4.1.1 Critical Level
      2. 4.1.2 Gain Level
      3. 4.1.3 Attack Rate
      4. 4.1.4 Release Rate
      5. 4.1.5 Hold Counter
    2. 4.2 Brown-Out Protection Response
  8. 5Thermal Foldback
    1. 5.1 Thermal Foldback Parameters
      1. 5.1.1 Temperature Threshold
      2. 5.1.2 Maximum Attenuation Threshold
      3. 5.1.3 Slope
      4. 5.1.4 Attack Coefficient
      5. 5.1.5 Release Coefficient
      6. 5.1.6 Hold Counter
        1. 5.1.6.1 Thermal Foldback Response
  9. 6Example
  10. 7Summary
  11. 8References

5 Thermal Foldback

An attenuation is applied to the output signal when the temperature of the die exceeds the user-defined threshold. The user defines the slope, max attenuation, and temperature threshold for this block, as shown in Figure 5-1. After enabling Thermal Foldback, the temperature can be monitored in DIAG_MON_MSB_TEMP (P0_R106) and DIAG_MON_LSB_TEMP registers (P0_R107_D7:4). The 12-bit hexadecimal must be converted to a decimal and then used in Equation 13 to compute the temperature in degrees Celsius.

Equation 13. T e m p e r a t u r e ( ° C )   =   408 . 815605   -   0 . 1225435506 × ( R e a d _ d a t a )  
Thermal Foldback Output Configuration Figure 5-1 Thermal Foldback Output Configuration

Figure 5-2 demonstrates that the user-defined max attenuation is applied to the signal and slope and the signal decreases as a function of temperature.

Thermal Foldback Example Figure 5-2 Thermal Foldback Example