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About DC-DC Converters
How to Select DC-DC Converters
What are 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.
Selection Criteria
The GlobalSpec SpecSearch database allows industrial buyers to select DC-DC converters by product type, DC input, DC output, performance specifications, design options and features.
Product Types
Common converter styles include
- 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.
DC Input
Choices for nominal DC input for DC-DC converters include 12 VDC, 24 VDC, 48 VDC, 110 VDC, 280 VDC, and 360 VDC.
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, and 48V.
Performance Specifications
Other performance specifications to consider include
- 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.
Design Options
- Common user interface options for DC-DC converters include
- Analog front panel
- Digital front panel
- Computer interface
- Parallel interface
- Serial interface
- Application software may be included for control or monitoring.
- Display options include
- Analog meter or indicators
- Digital readouts
- Video displays
- An important environmental parameter to consider when searching for DC-DC converters is the operating temperature.
Features
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.
Applications
Used frequently on vehicle-mounted systems computer flash memory, telecommunication equipment and process control systems .
Read user Insights about DC-DC Converters
Products & Services Related to DC-DC Converters
AC Power Sources
AC power sources provide alternating power and typically have adjustable output values for the testing of component response at various voltages, current and frequency levels.
AC-DC Adapters
AC-DC adapters accept AC input voltage directly from a wall outlet, and output DC voltage.
Current Sources
Current sources provide reliable current for electrical component testing and for powering specialized components.
High Voltage Power Supplies
High voltage power supplies use linear technology to provide one or more DC outputs at voltage levels of hundreds or thousands of volts.
Medical Power Supplies
Medical power supplies produce conditioned outputs for medical devices, instruments, and equipment.
Power Rectifiers
Power rectifiers are electrical devices that convert alternating current (AC) to direct current (DC). They are an integral part of telecom rectifiers for the telecommunications industry, and in battery chargers, DC power systems, and other power system devices.
Programmable Power Supplies
Programmable power supplies are digitally controlled power sources that provide accurate and adjustable levels of voltage, current, and frequency. They include a processor, voltage/current programming circuits, current shunt, and voltage/current read-back circuits.
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