SLAA937 June   2020 TAS2110 , TAS2562 , TAS2563 , TAS2564

 

  1.   Advantages of Thermal Foldback on SmartAmps
    1.     Trademarks
    2. 1 Advantages of Thermal Foldback Feature
    3. 2 Temperature Monitor
    4. 3 Thermal Foldback Configuration
      1. 3.1 Temperature Threshold
      2. 3.2 Thermal Max Attenuation
      3. 3.3 Thermal Slope
      4. 3.4 Hold Time
      5. 3.5 Release Rate
    5. 4 Thermal Foldback Performance
      1. 4.1 Device Configuration
      2. 4.2 Thermal Foldback Disabled
        1. 4.2.1 Initial Temperature
        2. 4.2.2 Final Temperature
      3. 4.3 Thermal Foldback Enabled
        1. 4.3.1 Final Temperature
    6. 5 Conclusions

4.3.1 Final Temperature

Thermal foldback is able to maintain the device below 132°C successfully, by lowering the gain. Figure 6 shows the temperature monitor at 105°C.

Temperature-Monitor_Thermal_Foldback.jpgFigure 7. Temperature Monitor - Thermal Foldback

The full-scale signal played at ambient temperature keeps playing on the amplifier. Figure 5 shows the comparison of the output at initial temperature and at final temperature. Initial temperature shows an amplitude of 11.22 Vpp while final temperature shows an amplitude of 8.42 Vpp, this is an attenuation of around -2.5 dB, close to the expected attenuation based on the thermal foldback settings.

Output-Waveforms-Thermal-Foldback.jpgFigure 8. Output Waveforms - Thermal Foldback