What is the application of SMPS
What is SMPS
Switch Mode Power Supply, or simply SMPS, is a type of power supply unit (PSU) that uses a type of switching device to transfer electrical energy from the source to the load. Usually the source is either AC or DC and the load is DC.
The most common use of an SMPS is in a computer's power supply. Switching Mode Power Supply (SMPS) has become a standard power supply for electronic devices because of its high efficiency, low cost, and high power density.
SMPS is a type of regulated power supply that uses a high frequency switching regulator to convert the power supply and also regulate the output in a highly efficient manner.
The switching regulator is again a transistor (like a Power MOSFET) like in Linear Regulator, but the difference is that the pass transistor in SMPS does not stay continuously in saturation or fully ON state, but alternates between fully ON and fully OFF states with a very high frequency. Hence the name Switching Mode Power Supply.
Since the average time of the switching element, i.e. the transistor remains in the active state, is less, the amount of consumption or dissipation as heat is very lower compared to linear controllers. This in turn leads to a high efficiency of SMPS, since the voltage drop across the pass transistor (or switching element) is very lower.
The switching action of the transistor is controlled with a technique called pulse width modulation (PWM) and the output voltage can be regulated by the operating cycle of the PWM.
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