Question

What is the difference between input and output current in smps?

Answer 1

Answer:

Voltage varies little with load. An SMPS can usually cope with wider variation of input before the output voltage changes. If regulated: efficiency largely depends on voltage difference between input and output; output voltage is regulated by dissipating excess power as heat resulting in a typical efficiency of 30–40%.

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Answer 2

Like other power supplies, an SMPS transfers power from a DC or AC source (often mains power) to DC loads, such as a personal computer, while converting voltage and current characteristics. ... In contrast, a linear power supply regulates the output voltage by continually dissipating power in the pass transistor