Design of a 300-Watt Isolated Power Supply for Ultra-Fast Tracking Converters

Khiem Nguyen-Duy, Ziwei Ouyang, Lars Press Petersen, Arnold Knott, Ole Cornelius Thomsen, Michael A. E. Andersen

Research output: Contribution to journalJournal articleResearchpeer-review


This paper presents the design of a medium-powerrating isolated power supply for ultra-fast tracking converters and MOS-gate driver circuits in medium and high voltage applications. The key feature of the design is its very low circuit input-to-output parasitic capacitance, which maximizes its noise immunity from noise due to fast changes in voltage. The converter is a voltage-controlled current source, utilizing a transformer with extremely low inter-winding parasitic capacitance, which is achieved by separating the windings by a significant distance. Experimental measurements show that an overall circuit input-to-output parasitic capacitance of 10 pF in a 300 W prototype can be achieved. The circuit input-to-output capacitance per watt is therefore 30 times lower than that of existing approaches. A mathematical model of the inter-winding capacitance of the proposed transformer, circuit analysis, and experimental results are provided to prove the feasibility of the converter.
Original languageEnglish
JournalI E E E Transactions on Power Electronics
Issue number6
Pages (from-to)3319-3333
Number of pages15
Publication statusPublished - 2015


  • Current transformers
  • Parasitic capacitance
  • Switching converters
  • Stacking
  • Dc-dc power converters


Dive into the research topics of 'Design of a 300-Watt Isolated Power Supply for Ultra-Fast Tracking Converters'. Together they form a unique fingerprint.

Cite this