ZETA Converter

Used for: generating a voltage higher or lower than the input with same polarity


  • Though zeta converter is similar to that of a buck-boost converter, it has an advantage of non-inverted output.
  • It has a wider range of duty ratio than any other converter.
  • The converter exhibits improved power factor, low input current distortion, low output current ripple and wide output-power range


  • Requires two inductors or one two-winding coupled
  • The input current is discontinuous, which is not desired for some applications.
  • It is a fourth order converter, which makes the control difficult. Some control techniques get difficult to implement in this converter, like sliding mode control.