High-voltage galvanic isolation technology

Galvanic isolation electrically separates circuits in order to improve noise immunity, remove ground loops, and increase common mode voltage. It can also protect human interfaces from contact with high voltages. An example where this plays an important role is the control of IGBT or SiC power modules in industrial and automotive environments. Further applications include data communication in field bus systems, battery management systems or the usage in medical equipment.

Features of the X-FAB galvanic isolation process include:

• Operational temperatures of up to 175°C.
• Successfully tested up to 6,000Vrms at 50Hz and 10,000VDC.
• Uninterrupted barrier layer with 0ppm residual contamination.
• Demonstrated conformance with latest IEC 60747-17 semiconductor coupler draft standard.
• Support for working voltages up to 1.7kV.

X-FAB offers two types of packaged galvanic isolation devices for customer evaluation. The capacitive coupler test chip, G3-C1, has an isolation layer thickness of 11µm and was tested to withstand up to 6,000 Vrms (the maximum limit of the test setup). An inductive coupler test chip, G3-T06, is also available for customer evaluation and has an isolation layer thickness of 14µm.

The new X-FAB galvanic isolation technology is manufactured at the company’s Dresden facility, which is certified for automotive manufacturing in accordance with the IATF-16949:2016 International Automotive Quality Management System (QMS) standard. Design kits for all major EDA platforms can be downloaded from X-FAB’s customer web portal. Samples can be supplied on request. Full process qualification reports are also available.