DC/DC Buck Boost Converters

Demke Electronic's portfolio includes non-isolated DC/DC step up and step down converters up to 600W power. Demke DC/DC buck-boost converters are part of to the 200 series. It must be pointed out that even non-isolated Demke DC/DC Buck Boost converters are short circuit proof in all operating points.

Thanks to their universal design and discrete construction, our DC/DC step-up and step down converters with their typically 1:4 ultra-wide input range stand out from other dc-dc converters and can be used in a variety of applications.

All Demke DC-Transformer have excellent mechanical and electrical characteristics. Our DC/DC converters are extremely robust and long-term stable. With the help of integrated EMC input and output filters, we limit the ripple and noise of current and voltage to a minimum. All DC/DC buck-boost converters comply with common industry standards, some even with residual EMC standard according to EN55022-B.

Demke DC-Transformer of the 200 series are intended to be used at ambient temperatures from -40°C to +85°C and they are no-load and short-circuit proof over the entire specified temperature range. Obviously, our non-isolated DC/DC buck-boost converter are used as a battery charging converter. Further they can drive high capacitive loads thanks to uncompromising control theory.

The performance record is supplemented by the high specific power with a very high efficiency.

The polyurethane potting protects the electronic circuit against environmental influences and distributes the generated heat loss during operation homogeneously over the entire DC/DC converter, so that a passive heat sink via the bottom of the housing is sufficient in most cases.

We have listed a selection of galvanically non-isolated DC/DC step-up (boost) and stepdown (buck) converters below. If the suitable product missing, please have a look at our DC-Master 200 series and configure your DC/DC-converter by your own. You can find a complete product selection here.

Characteristics DC/DC Buck-Boost converters

  • Power range up to 600W
  • Ultrawide input range from i.e. 7…70VDC and even more
  • DC outputs from 12V bis 50.4V
  • Customer specific adaptations possible
  • Passive heat dissipation via housing
  • Wall mounting
  • Housing size medium: 90x90x26mm
  • Uncompromizing stepping up or boosting of very low
      input voltages as low as 7V at 30A
  • Excellent CC/CV Battery load characteritics

Currently in use

  • 12V power supply for forklift trucks and AGV
  • 19V power supply for mobile IT-systems
  • 24V power supply for forklift trucks and AGV and many other
  • 13.8V, 27V, 28V, 29V to 50.2V as Backup-Batterie DC/DC charging converter

Universal applicable thanks to ultra wide range input of 1:10!


Overview DC/DC Buck Boost Converters

non-isolated DC/DC buck-boost converter Typ DC-Transformer 251-24-SD with output voltage 24.0V, 260 watts and input voltage 12V to 36V

251-24-SD

Vin: 12 ... 36 VDC
Vout / Max. Current: 24.0 VDC / 11.0 ADC

non-isolated DC/DC buck-boost converter Typ DC-Transformer 251E-28-SD with output voltage 28.0V, 300 watts and input voltage 16V to 36V

251E-28-SD

Vin: 16 ... 36 VDC
Vout / Max. Current: 28.0 VDC / 11.0 ADC

non-isolated DC/DC buck-boost converter Typ DC-Transformer 251L-24-SD with output voltage 24.0V, 240 watts and input voltage 10V to 36V

251L-24-SD

Vin: 10 ... 36 VDC
Vout / Max. Current: 24.0 VDC / 10.0 ADC

non-isolated DC/DC buck-boost converter Typ DC-Transformer 257E-24-SD with output voltage 24.0V, 360 watts and input voltage 15V to 35V

257E-24-SD

Vin: 15 ... 35 VDC
Vout / Max. Current: 24.0 VDC / 15.0 ADC

non-isolated DC/DC buck-boost converter Typ DC-Transformer 257E-28-SD with output voltage 28.0V, 360 watts and input voltage 15V to 35V

257E-28-SD

Vin: 15 ... 35 VDC
Vout / Max. Current: 28.0 VDC / 13.0 ADC

non-isolated DC/DC buck-boost converter Typ DC-Transformer 257LE-24-SD with output voltage 24.0V, 300 watts and input voltage 10V to 35V

257LE-24-SD

Vin: 10 ... 35 VDC
Vout / Max. Current: 24.0 VDC / 13.0 ADC

non-isolated DC/DC buck-boost converter Typ DC-Transformer 257LE1-29 with output voltage 29.0V, 180 watts and input voltage 6V to 28V

257LE1-29

Vin: 6 ... 28 VDC
Vout / Max. Current: 29.0 VDC / 6.5 ADC

non-isolated DC/DC buck-boost converter Typ DC-Transformer 257LEX-12-SD with output voltage 12.0V, 240 watts and input voltage 7V to 35V

257LEX-12-SD

Vin: 7 ... 35 VDC
Vout / Max. Current: 12.0 VDC / 20.0 ADC

non-isolated DC/DC buck-boost converter Typ DC-Transformer 257LEX-24-SD with output voltage 24.0V, 200 watts and input voltage 7V to 35V

257LEX-24-SD

Vin: 7 ... 35 VDC
Vout / Max. Current: 24.0 VDC / 8.0 ADC

non-isolated DC/DC buck-boost converter Typ DC-Transformer 258E-24 with output voltage 24.0V, 300 watts and input voltage 15V to 58V

258E-24

Vin: 15 ... 58 VDC
Vout / Max. Current: 24.0 VDC / 13.0 ADC

non-isolated DC/DC buck-boost converter Typ DC-Transformer 258E-50 with output voltage 50.4V, 500 watts and input voltage 20V to 63V

258E-50

Vin: 20 ... 63 VDC
Vout / Max. Current: 50.4 VDC / 10.0 ADC

non-isolated DC/DC buck-boost converter Typ DC-Transformer 258E1-27.5-On with output voltage 27.5V, 220 watts and input voltage 15V to 58V

258E1-27.5-On

Vin: 15 ... 58 VDC
Vout / Max. Current: 27.5 VDC / 8.0 ADC