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Difference Between an SMPS and a DC-DC Converter
Input Voltage
The input voltage range of an SMPS is much larger than that of a DC-DC converter. For example, a typical SMPS can be operated from an input voltage range of 9V to 36V while a DC-DC converter may only have an input voltage range of 12V to 24V.
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Output Voltage
The output voltage of an SMPS is limited to the range of the input voltage. For example, if you have a 24V input and want to convert it to 12V, then your maximum output voltage will be 12V. MRE offers 24V Adapter – BIS Approved, Small, Stable, and Long-Lasting Power Adapter for a Variety of Devices.
On the other hand, DC-DC converters can produce a wide range of voltages from their inputs. This means that you can use them to produce multiple voltages from one power source!
Efficiency
When it comes to efficiency, SMPSs are the clear winner. Unlike DC-DC converters that require an inductor and a capacitor for each output voltage, SMPSs have only one switching element per output voltage. This means that they can achieve efficiencies up to 97% or higher while operating at high frequencies (upwards of 1MHz).
The main reason why DC-DC converters are less efficient than SMPSs is due to their use of an inductor in their design. Inductors have losses associated with them; these losses come from magnetic hysteresis and eddy current heating within the core material used in making an inductor.
Cost
The cost of an SMPS vs. DC-DC converter depends on several factors, including the size and complexity of your system. The more components you have in your circuit, the higher your overall cost will be.
The main difference between these two types of converters is that an SMPS uses a transformer to step up or step-down voltage levels while a DC-DC converter does not require one because it operates at constant voltage levels instead of changing them like an SMPS does.
Size
The size of an SMPS is much smaller than a DC-DC converter. This is because it only needs to be able to handle the current required by its load, whereas a DC-DC converter has to be able to handle all of the current coming from its input source.
Difference Between an SMPS and a DC-DC Converter
Conclusion
An SMPS is a good choice for applications that require high efficiency and low ripple. The DC-DC converter, on the other hand, has a wider range of input voltage and output current options but is less efficient than an SMPS at low loads.
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If you're looking for a way to convert AC power into DC power or vice versa with minimal losses in efficiency and with minimal external components (such as capacitors), SMPSs are your best bet. However, if you need more flexibility in terms of input voltage range or output current capability then using a DC-DC converter may be better suited for your needs
