SLAA899 December   2019 TAS2110 , TAS2555 , TAS2557 , TAS2559 , TAS2560 , TAS2562 , TAS2563 , TAS2564 , TAS2770

 

  1.   Battery Voltage Tracking Limiter and Brown-Out Protection
    1.     Trademarks
    2. 1 Introduction
    3. 2 Benefits
    4. 3 Brown Out Protection and Limiter Design
    5. 4 VBAT tracking limiter
      1. 4.1 Threshold
      2. 4.2 Inflection Point and Slope
      3. 4.3 Attack
      4. 4.4 Hold Time
      5. 4.5 Release
    6. 5 Brown Out Protection (BOP)
    7. 6 System Testing
      1. 6.1 BOP (1)
      2. 6.2 BOP Release (2)
      3. 6.3 Limiter Release (3)
      4. 6.4 Maximum Output (4)
      5. 6.5 Limiter Attack (5)
      6. 6.6 BOP Attack (6)
    8. 7 Design Consideration
    9. 8 References

4.5 Release

The release settings are also configurable similar to the attack settings. There is a separate release step control with the same range as the attack. Release rate typically varies from 10 samples per step to 1280 samples per step and step size varies from 0.25 dB to 2 dB. This can allow a full release from maximum attenuation to last anywhere from 1.7 ms to 1.76 seconds.

Release.gifFigure 6. Release Profile

In Figure 6, we release 13.5 dB with the rate set to 160 samples per step and a step size of 0.25 dB. The result is a gradual release over 180 ms.