SLVAE22A July   2018  – March 2019

 

  1.   Power Stage Gain and Slope Compensation Measurement in PCM (Peak Current Mode) BUCK Converter
    1.     Trademarks
    2. 1 Introduction
    3. 2 Unified PCM BUCK Converter
    4. 3 Power Stage Gain Measurement
      1. 3.1 Simplified Small Signal Model for Power Stage Gain
      2. 3.2 Power Stage Gain Measurement Method
    5. 4 Slope Compensation Measurement
      1. 4.1 Relationship Between VCOMP and Se
      2. 4.2 Slope Compensation Measurement Method
    6. 5 Measurement Results Verification
      1. 5.1 TPS65261 Measured GM-PS and Se
      2. 5.2 Measured Bode Plot vs. Calculated Bode Plot
    7. 6 Summary
    8. 7 References
  2.   Revision History

6 Summary

This application report presents a method of measuring power stage gain (GM-PS) and slope compensation (Se) in a peak current mode (PCM) BUCK converter. This method is also validated in other PCM architecture converters, such as BOOST, BUCK-BOOST, and so forth. You can build the simulation model by using these internal parameters. Based on the model, the maximum optimization loop stability can be achieved.