SLUA101A August   1999  – November 2026 TPS54331 , UC1842 , UC1842-SP , UC1842A-EP , UC1842A-SP , UC1843 , UC1843-HIREL , UC1843-SP , UC1843A , UC1843A-DIE , UC1843A-EP , UC1843A-SP , UC1844 , UC1844-SP , UC1844A , UC1844A-EP , UC1844A-SP , UC1845 , UC1845-SP , UC1845A , UC1845A-EP , UC1846 , UC2846 , UC2846M , UC3842M , UC3845AM , UC3846 , UC3847

 

  1.   1
  2.   Modelling, Analysis and Compensation of the Current-Mode Converter
  3. 1Introduction
  4. 2Peculiarities of the Peak-Current Control Converter
    1. 2.1 Open Loop Instability
    2. 2.2 Ringing Inductor Current
    3. 2.3 Subharmonic Oscillation
      1. 2.3.1 Loop Gain Calcluation at ½fS
      2. 2.3.2 Using Slope Compensation to Eliminate Subharmonic Oscillation
    4. 2.4 Peak Current Sensing Versus Average Current Sensing
    5. 2.5 Small Ripple Current
  5. 3Small Signal Ac Model
    1. 3.1 AC Model Derivation
    2. 3.2 AC Model Discussion
  6. 4Slope Compensation of the UC1846 Control Device
  7. 5References
  8. 6Revision History
Application Note

Modelling, Analysis and Compensation of the Current-Mode Converter