SLVAEJ1 January   2020 TPS25830-Q1 , TPS25830A-Q1 , TPS25831-Q1 , TPS25832-Q1 , TPS25833-Q1 , TPS25840-Q1 , TPS25842-Q1

 

  1.   Loop Characteristic Evaluation and Optimization of TPS2583x-Q1
    1. 1 Introduction
      1. 1.1 Loop Introduction of TPS2583x-Q1
    2. 2 Loop Test Method of TPS2583x-Q1
      1. 2.1 Test the Loop Characteristics Without Cable Compensation Function
      2. 2.2 Evaluating Loop Characteristics With Cable Compensation Function
    3. 3 How to improve the loop characteristic of TPS2583x-Q1
    4. 4 Summary
    5. 5 References

4 Summary

  • The loop characteristic of TPS2583x-Q1 EVM is crossover frequency is 39.25 kHz, phase margin is 44.914°, gain margin is 13.52dB.
  • The loop characteristic of TPS2583x-Q1 with and without cable compensation function is almost the same, so you can evaluate the loop characteristics by measuring the loop characteristic of TPS2583x-Q1 without cable compensation function.
  • The loop characteristic can be improved by decreasing the power inductor and increasing the output capacitance; however, it should be noted that the switching frequency needs to be increased to ensure that the inductance current is within a reasonable range when the inductor is too small.