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

4.2.1 Initial Temperature

For this test, the thermal foldback has been disabled and an initial temperature of 23°C is observed in Figure 3 using the temperature monitor.

A hot air stream is used to heat up the device. As the hot air is applied to the device, the temperature rises until it triggers the over-temperature protection causing the device to shut down.

Temperature-Monitor-Ambient-Temperature.gifFigure 3. Temperature Monitor - Ambient Temperature

At this initial temperature, a full-scale input signal is played. Figure 4 shows the output of the amplifier at full-scale; this plot shows the differential signal across the speaker load, the amplitude of this signal is later compared versus the output signal when thermal foldback is triggered.

Output-Waveforms-Ambient-Temperature.jpgFigure 4. Output Waveforms - Ambient Temperature