Power supply is a broad term. The two popular categories of power supplies are switched mode power supply (SMPS) and linear regulated power supply.
Like a linear power supply, the switched mode power supply too converts the available unregulated AC or DC input voltage to a regulated DC output voltage. A single power supply unit may need to output several different voltages. The individual output voltages may have different ratings in terms of output current, voltage regulation and ripple voltages. These outputs may need isolation between them. Often the power supply input is from the standard utility power plug point 230V / 50Hz. Or 220V DC as per the requirement of the plant design.
The advantages of SMPS power supplies are they are compact in size, high efficiency, less dissipation of Heat, can be used to provide high efficiency voltage conversions in voltage step up or ?Boost? applications or step down ?Buck? applications.
RATO has designed, developed and produced many types of Switching Mode Power supplies which work with 230V AC or 220V DC, with different output voltages and current ratings, we could achieve <10mV peak to peak ripple/ noise voltage with <0.1% line and 0.2% load regulations.