DC-DC Converters Information

DescriptionHow to Select DC-DC Converters


DC-DC converters accept DC input and provide regulated and/or isolated DC output in various applications including computer flash memory, telecommunications equipment, and process control systems. DC-DC converters are frequently used on vehicle-mounted systems computer flash memory, telecommunication equipment and process control systems.


Performance Specifications

DC Output

DC output is the most important parameter to consider when searching for DC-DC converters.  Common outputs converted include:


  • 3.3V
  • 5V
  • 12V
  • 15V
  • 24V
  • 48V

DC Input

Choices for nominal DC input for DC-DC converters include:


  • 12 VDC
  • 24 VDC
  • 48 VDC
  • 110 VDC
  • 280 VDC
  • 360 VDC



Other performance specifications to consider include:How to Select DC-DC Converters


  • Output power is measured by the wattage rating, which is the total nominal power output of a converter.
  • Line regulation is the percent change in output voltage when VDC input is varied from lowest value to highest value.
  • Load regulation is the maximum steady state amount that the output voltage changes as a result of a specified change in load.
  • Minimum load is specified for the primary output for converter to meet performance specifications.
  • Operating temperature


Common features for DC-DC converters include:


  • Constant current supply (CC) designed to provide an output current that stays constant with changes in load impedance.
  • Overvoltage protection is internal circuitry that limits or shuts down the voltage output in an overvoltage condition. When present, it is most usually found on the primary output.
  • Overcurrent protection is internal circuitry that limits or shuts down the current output in an overcurrent condition.
  • Short circuit protection employs techniques to protect the converter in the event of a short circuit on the load may include electronic current limiting and thermal resets with automatic recovery.
  • Remote on and off converters have the option to turn the devices on or off remotely.
  • Application software included for control or monitoring

Design Options


Common mounting options include:DC-DC Converters


  • PCB mount
  • PC board
  • Internal or open frame mount power supplieshave exposed circuitry and components. They aresimply circuit boards to which all of the circuitry and components attach on one side.
  • Rack mount come with hardware such as rail guides, flanges, or tabs. Some rack-mounted devices fit in a standard 19" telecommunications rack.
  • DIN railare standard DIN rail mount. DIN is an acronym for Deutsches Institut für Normung (DIN), a German national organization for standardization.

User Interface


User interface options include:


  • Analog front panel
  • Digital front panel
  • Parallel interface
  • Serial interface


Display options include:


  • Analog meter or indicators
  • Digital readouts
  • Video displays


SMD 5962-03241

SMD 5962-03242

SMD 5962-03243

SMD 5962-03244




Image Credit:


Cooper Bussmann, Inc.



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