A comparative study of phase margin based digital and analog controlled synchronous buck with optimum LC filter

• Ruchi Rashmi ^[1] ; Shweta Jagtap ^[1]
  1. [1] University of Pune

     University of Pune

     India

     
• Localización: Compel: International journal for computation and mathematics in electrical and electronic engineering, ISSN 0332-1649, Vol. 38, Nº 6, 2019, págs. 298-317
• Idioma: inglés
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• Resumen

  • Traditionally, industrial power supplies have been exclusively controlled through analog control to sustain high reliability with low cost. However, with the perpetual decrement in cost of digital controllers, the feasibility of a digitally controlled switch mode power supply has elevated significantly. This paper aims to outline the challenges related to the design of digital proportional-integral (PI) controlled synchronous rectifier (SR) buck converter by comparing controller performance in continuous and discrete time. The trapezoidal approximation-based digital PI control is designed for low voltage and high-frequency SR buck converter operating under continuous conduction mode.