All news at a glance

DC/DC Converters for Li-Ion Battery Charging, E13 Approved Converters

E13-approved DC/DC converter for charging li-ion batteries, specially designed for optimum performance and safety.

1000W without power derating ideal for automotive applications

The innovative DC/DC buck converters of the 172 series with up to 1000W power, up to 99% efficiency and no power derating set new standards.

DC/DC converter without derating: Full power at high temperatures

DC/DC converters without derating offer full power at high temperatures. Find out more about the advantages and applications of this innovative technology.

DC/DC battery charging converters 24V, 48V and 80V for warehouse management systems and forklift trucks

The DEMKE ELECTRONIC DC/DC converter 755-24-SD is a galvanically isolated buck-boost converter which is specially designed for 24 V, 48 V and 80 V power supply systems. It allows safe operation of loads with different voltages than the battery voltage. It protects sensitive loads from voltage fluctuations and increases the efficiency and lifetime of the battery.

Ideal for railway applications. The ultra-wide input range from 16 to 160 VDC and the electrically isolated, bipolar output voltage of +/-15V characterize the push-pull converter 364W2-15015-SDB1.

Isolated DC/DC converters for PCB mounting, THT

Our isolated DC/DC Converters for PCB mount are highly reliable in operation, even at very extreme ambient temperatures from -40°C to +85°C. The heat dissipation of these isolated PCB mounted DC/DC converters is passive through the aluminium housing without power derating.

Galvanically isolated, DC/DC converter , Automotive, 450W, 57V output voltage, E-vehicle approval

Two years ago, we successfully developed our first DC/DC battery charging converter from 13.8V to 57V with galvanic isolation, 450W power and with E-approval for one of our customers. The DC/DC converter 729-57-SD was specially developed for use with a 13.8V alternator. Newly our customer uses truck alternators with 27.6V and for enabling a D+ signal.

DC/DC buck-boost converter, supercapacitor, supercap, battery, bms, 800W, 48V, charging converter

Small, lightweight, high power density, insensitive to vibration, 48V output voltage - these are the customer requirements of a DC charging converter for autonomous driving and the vehicle technology of tomorrow.

The existing design of our universally applicable 700 series could be adapted with little effort to this powerful wide-range converter from 19VDC...70VDC and an efficiency of up to 95%.

DC/DC converters for harsh environments, industrial systems and outdoor applications

Whether it's construction machinery in Alaska, cable cars in the Swiss Alps or wind turbines in India, all applications are exposed to different environmental influences. In order to guarantee the quality of our Demke DC/DC converters under various kinds of environmental impacts, we have to test them under extreme conditions and let them age prematurely. Our laboratory tool have more than proven themselves in the development of DC/DC converters. We are able to design and manufacture extremely robust, climate-proof and individual devices for various applications.

High reliability polyurethane potted DC/DC converters with flying leads for automotive applications

The demand for potted DC/DC converters with cable connections has been increasing continuously. Potted DC/DC power supplies can be mounted outside control cabinets, e.g. directly on the chassis. This avoids unnecessary waste heat in the splash-proof control cabinet, frees up space for sensitive components and, last but not least, several DC/DC converters can be used decentrally.

The relatively soft UL94-V0 listed polyurethane encapsulation not only ensures a vibration- and shock-resistant product but also provides excellent protection against environmental influences of any kind. The aluminium housing further underlines the robustness.

DCDC Converter for battery charging – emobiliy

With the new 142 and 162 series of non-isolated DC/DC converters, Demke once again highlights its ability to compete against low-cost competitors with extremely stable products specified with sufficient reserves. Against the trend of more power and derating or fewer reserves and performance, we are confidently breaking new ground in electromobility with our decentralised and highly reliable DC/DC converters.

DC/DC Converter 729-24-SD 12V to 24V and 18A with 450W

Modern battery-powered electric vehicles often use primary main battery voltages between 350V-650V. As in all vehicles, these must be converted to 12V or 24V to supply various electrical consumers such as lighting, infotainment, and many more. The robust DC/DC converter 729-24-SD is highly integrated in terms of broadband EMC filter, advanced control technology, state-of-the-art power semiconductors and energy storage elements. PU potting makes it robust to shock and vibration and can be widely used for applications such as construction machinery or other vehicles.

DC/DC step-down converter 24V to 12V, 48V to 12V, 80V to 12V, 12A

The DC-Transformer 145-12-SD belongs to the non-isolated DC/DC step-down converters of the 100 series. Due to the 1:6.25 wide input range with 16 to 100 VDC input voltage, it is perfectly suitable as a 12V power supply in battery electric systems with supply voltages of 24V, 48V and 80V. Thanks to its size of 77x52x19mm and weight of 166g, it is ideal for space-critical applications.

DC/DC converter for railway applications - Ideally suited for 24V, 48V, 110V DC networks

Ideal for railway applications. The ultra-wide input range from 16 to 160 VDC and the electrically isolated, bipolar output voltage of +/-15V characterize the push-pull converter 364W2-15015-SDB1.

With the new galvanically isolated DC/DC step-up and step-down converters, we provide a specific power density of 1W/g. Constant current controlled (CC) - and constant voltage controlled (CV) as well as adaptable for various output voltages (currently 13.8V, 24V, 28V, 48V), the DC/DC converters of the 755 series can easily be used as DC/DC battery charging converters.

Demke DC/DC Converter 13.8V, 20A for eMobility

Our converters also bring the horsepower to the ground in E-Trucks. The DC-Transformer 151DH-13.8-On with 13.8V output voltage and 280 Watt power is installed in the new series of the most powerful FUTURICUM E-Trucks with over 680 HP as a 13.8V battery charging converter and 12V power supply.

Demke Electronic supports freestyle sports

We think it is more important than ever that young people find their sporting balance outdoors in nature. That's why we support the association , which promotes freestyle sports in the Davos Klosters region in Switzerland.

Demke DC-Transformer - DC/DC buck-boost EMC automotive tested

The Demke DC-Transformer 729-57-SD was specially developed as a Li-Ion battery charging converter. The primary supply is the generator with the 13.8V supply voltage or the car battery with 12VDC voltage. Due to its usage in vehicles, this galvanically isolated DC-DC converter is automotive EMC certified according to EN50498:2010.

Demke Electronic DC-Transformer DC/DC Buck Converter performance upgrade

No other Demke DC-Transformer (non-isolated step-down DC/DC converter) as the 145-series is built in several variants, has a higher power density or is more climate-proofed. As a part of our ongoing product management, we have got even more performance from the 52x77x19 mm DC/DC converter.

E-Mobility with Demke DC/DC converter

Our DC-Transformer 257LE1-29 is in permanent operation on the road and makes the daily life of many delivery people easier. We are pleased that we can support this new way of delivery with our robust and universally applicable devices and promote the future of e-mobility.

Non-Isolated DC/DC step down converter with 12VDC 17A output

This performance upgrade includes a power increase of 20W with a simultaneous noise reduction. Demke DC-transformer have always been optimised for maximum efficiency with minimum interference emission - we continue to pursue this goal consistently.

Galvanically isolated bipolar Demke DC/DC converter 364W2-15015-SDB1 for railway applications

To make it easier to understand the special characteristics of our DC/DC converters, a characteristic curve plot will be available as take away (PDF) for each article in the future.

DC-Transformer 257E-24-SD (48V) used for running four legged robot Anymal c in industrial environment

In the context of a master thesis at the Robotic Systems Lab (RSL) at ETH Zurich, a customer-specific DC/DC converter (Demke DC Transformer) was developed and tested for use in a novel energy storage system. Due to the high performance and strict weight requirements in dynamic walking robots, power density becomes a key parameter.

DC/DC converter in compact aluminium housing with 450 Watt power and 57 VDC output

Our new E13-certified 450 Watt DC/DC Converter for Automotive and E-Mobility applications is ready for road use and has been installed successfully in the first road legal vehicles. The DC Transformer passed the E13 10R - 05 certification right away, this was a great appreciation for the work of our engineers and motivates for further projects.

Oscilloscope for measurements on DC/DC voltage converters

Since our company is constantly growing, we have decided to expand our office space. We have enlarged the laboratory space and created a modern lounge area for our engineers and customers. This area is used by our employees to let creativity and know-how flow together. By incorporating the needs of our customers, the first developments of future DC-Transformers are created here, tested and realized in the laboratory right next door.

Group handshake for a strong team

In the past we invested a lot of time and energy in the development of our company. Now, thanks to the existing digitization of our in-house processes and our ERP system, we are able to carry out our work here in Switzerland up to 100% in our home-offices if necessary. Our great team spirit is very valuable in this time.