High-Temperature Coplanar Transformer

Maxime Semard (1) , Christian Martin (1) , Cyril Buttay (1) , Charles Joubert (1)

1 EE - Ampère, Département Energie Electrique

Power electronics tends to go higher in frequency and higher in power density. This requires integrated transformers which are able to withstand high temperature (over 200˚C). This paper addresses the manufacturing and test of low power transformers used for the isolation in gate circuits power supplies. The transformers are built from a magnetic substrate (ferrite) using a microfabrication process detailed in the paper. The presented transformers are intended for power below 1 W, voltage circa 10 V, switching frequency of 1 MHz, temperature ranging from –55˚C to 200˚C and an isolation capacitance below 10 pF.

Mots clés: thick film inductors; microfabrication; Transformer

Domaines: Energie électrique

Maxime Semard, Christian Martin, Cyril Buttay, Charles Joubert. High-Temperature Coplanar Transformer. 2018 IEEE ICIT, A. Sari, Laboratoire Ampère, Feb 2018, Lyon, France. pp.730 - 735, ⟨10.1109/ICIT.2018.8352268⟩. ⟨hal-01736329⟩