Buck-boost converter for battery powered systems

up to production

Whether prototyping, series production or customized DC developments, we are your competent partner for robust, high-quality DC/DC voltage Converters with high power density. We maintain long-term relationships with our small- and large-sized customers, which we supply worldwide.

Innovative engineering since 2008 and before

Demke Electronic GmbH is an independent Swiss company with headquarters in Wil SG, founded in 2008. As an innovation driver, we are independently following new ways and continue to use the synergies with the German company of the same name. With technological expertise and know-how in the field of switched-mode, grid-independent DC power supplies, we push the limits of what is technologically possible and produce high-quality DC converters. A very high power density, reliability, high load capacity and longevity characterize our DC/DC converters.

State of the art quality from one source


In our small-scale and series production, direct structures allow a swift reaction to customer requirements and project requirements. Quality control and process monitoring are permanently ensured. On request, we supply all test protocols and necessary documentation for series products.

Our long-standing cooperation with ELOTEC Fischer Elektronik GmbH, our production partner for electronic- and assembly manufacturing in Germany, enables us to realize even large quantities in the shortest possible time with the same high quality standard. ELOTEC Fischer is certified according to DIN EN ISO 9001: 2015.

Standards and certifications

Excellent EMC properties of the DC transformers due to input and output filters. The latest DC developments meet the standards:

  • EN 61000-6-2, Immunity standard for industrial environments
  • EN 61000-4-2, immunity against electrostatic discharge (ESD)
  • EN 61000-4-3, immunity against High frequency electromagnetic fields
  • EN 61000-4-4, immunity against electrical fast transients (burst)
  • EN 61000-4-5, immunity against high energy surges (Surge)
  • EN 61000-4-6, immunity against induced, conducted disturbances, HF fields
  • EN 61000-6-3, emission standard for residential and commercial areas
  • EN 61000-6-4, emission standard for industrial environments
  • EN 55022 < class A

Certifications flexible on customer request possible:

  • EN 50155, railway applications / EN 45545, fire protection railway
  • EN 61373, railway equipment / EN 50121-3-2, EMC
  • E13-10R-05, automotive road approval (DC/DC-Converter)
  • And more...

Our highly specialized team is committed to the following tasks:

Development Research Prototyping Production of small and special series