Expanded transformer series for SiC MOSFET gate drivers

Würth Elektronik offers new additions to the WE-AGDT series, with interwinding capacitance lower than one picofarad, more topologies and higher output voltage options. All transformers employ the same compact SMT EP7 package with 11.3mm x 10.95mm x 11.94mm dimensions.

The series is an Auxiliary Gate Drive Transformer series for up to 6W isolated auxiliary supplies targeting gate driver systems for SiC-MOSFETs and IGBTs. In these designs, the most critical aspect is the transformer interwinding capacitance due to the high dV/dt, which is common in designs utilising Wide-Bandgap Devices. The new additions to this series provide interwinding capacitance as low as 0.68pF and output voltages as high as 30V. Options now include LLC, Half-Bridge, or Flyback topologies and one or two outputs which can be employed in either unipolar or bipolar applications.

The series complies with the IEC62368-1/IEC61558-2-16 safety standard and is AEC-Q200 qualified. The transformers are suited to use in industrial drives, AC motor inverters, HEV/EV charging stations, solar inverters, UPS and active power factor correction.

Free samples are also provided, and reference designs are available with PCB fabrication and layout design files.