DC-DC Voltage Converters
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About DC/DC voltage transformers
DC-DC voltage transformers are DC-DC converters that convert a DC voltage applied to higher, lower or inverted voltage levels. The output voltage behind the DC-DC converter can be a regulated or unregulated DC voltage. For more complex DC-DC converters, it is possible to isolate the input voltage from the output voltage for safety reasons.
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How do DC/DC converters work?
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What are DC/DC voltage transformers used for?
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What was to be observed when selecting voltage transformers?
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Questions and answers
In English these voltage transformers are called DC-DC-Converter, whereby DC means direct current, i.e. direct voltage. DC-DC converters for the generation of high output voltages are also referred to as transverters. In energy and drive technology, the term DC converter is used for the voltage transformers.
How do DC/DC converters work?
DC-DC converters are among the converters. They convert direct voltage at the input into direct voltage at the output. DC voltage is converted in the DC/DC voltage converter by electronic switches and by energy storage.
This process is realized via the inductance of a coil in the component.
There are three options for conversion:
- Increasing the voltage: A higher voltage can be converted from the power source into a lower voltage for the power supply of an electronic device.
- Reduction of voltage: Alternatively, a lower voltage can be converted into a higher output voltage for the electrical consumers behind the DC-DC converter.
- Inversion of the voltage: The inversion of the current voltage is also possible as a conversion. It means that the current flow changes its polarity.
Some DC/DC converters are suitable as switching power supplies, so they can produce several values as constant output voltages or be operated with different input voltages. For DC-DC converters with less complex design, only one conversion option between input and output voltage is available.
A distinction is made between non-isolated and isolated DC-DC converters.
- Non-insulated DC-DC converters do not separate inputs and outputs, the current flows through them. Their advantage lies in the cost-effective production. They are used for smaller voltage conversions.
- Isolated DC/DC converters have a high isolation voltage and can connect input and output voltage potential-free, i.e. electrically isolated. They are used for safety reasons at high currents, high voltage levels or for sensitive components.
Note: The use of DC converters can generate heat by converting energy. Ensure sufficient air circulation and do not position switched-mode power supplies and other voltage regulators close to heat-sensitive components.
Where are DC/DC voltage transformers used?
DC-voltage converters are used where a DC voltage at the input does not match the supply of subsequent electrical consumers. DC-DC converters are often found in ready-made power supplies for devices such as PCs, notebooks, smartphones, radios and other small electronic devices. These are usually designed for indoor use, as they are not sufficiently insulated in contact with rain water and other weather influences.
In industrial applications, DC/DC converters are used to supply electronic modules such as display systems, boards and process controls. In addition, DC/DC converters are used for power supply by batteries, for example in vehicles. In this case, compared to linear power supplies, they have a higher efficiency and lower heat generation, which was a positive effect on the battery life.
In our shop you will find DC-DC converters for stationary or mobile use. In addition, a distinction is made with specific DC converters between those for
- Internal area
- Automotive
- Truck
Safety note: Use DC-DC converters only according to the manufacturer's specifications. These can be found in the respective product data sheets. There you will also find information on suitability for specific applications. Improper use or installation can lead to damage and a significant risk of injury.
What was to be observed when selecting voltage transformers?
Input and output voltage as well as existing connections are relevant for the selection of a suitable DC-DC converter.
Connection/ output
The Output filter allows you to choose between different connection options for electronic devices. The designated output is the output at which subsequent devices are connected to the output voltage from the DC-DC converter. Common connections for DC converters are, for example, flat plugs, hollow plugs, jack plugs, cigarette lighter plugs for car requirements, screw terminals, connecting bolts, cables, USB & mini-USB.
Input voltage
The input voltage is the supply voltage that is connected to the input of the DC converter. Typical voltage values of batteries such as 12 V (car) and 24 V (truck) are often found in the various types of devices for voltage conversion. But you can also find what you need for higher voltages up to 80 V in our shop.
As a reminder, it is important that the input voltage is DC voltage!
Output voltage
The output voltage is the voltage that the DC-DC converter generates from the input voltage and passes on to subsequent devices. In practice, it is often lower than the input voltage. Switching DC-to-DC converters can produce different levels at the output side. In our shop you will find DC/DC converters for output voltages between 1.5 V and 12 V.
Output current (max.)
In addition to the voltage level, limiting the current flow is also relevant for the operation of connected devices behind the DC-DC converter, because sensitive components will be damaged if the current flow is too high hohem. DC/DC converters with current flows at the output from a maximum of 0.7 to a maximum of 45 amps are available.
Note: For safety reasons, observe the maximum permissible ampere values for the current flow for all electronic components in your power circuit.
Questions and answers
Why should DC/DC voltage transformers not be connected directly to a normal mains socket?
DC/DC converters require DC voltage. On the other hand, AC voltage flows from the socket, which can lead to short-circuits and damage to all components in the circuit if the DC-DC converter is incorrectly supplied with AC voltage. Before the DC-to-DC converter, the current must be equalvoltage to direct voltage. This is achieved by means of AC/DC converters, whereby AC is equivalent to current, i.e. alternating current, and DC is direct current, the direct voltage. Various AC-DC converters as rectifiers can be found here in our shop!