What is SMPS and how does it work?
Switched Mode Power Supply. Unlike the old power supplies of the past, which used large, heavy transformers, SMPS’s use transistors switching DC power on and off at very high rates (typically 40 to 80 thousand times per second) into the primary of a much smaller, more efficient transformer. SMPS, in addition to being lighter and more efficient, afford better regulation of voltages. They’re a bit harder to work on, but the benefits far outweigh that little inconvenience. FYI, they can also be called DC-DC converters since in a conventional setup, the house current is converted to DC by a rectifier before it goes into the SMPS. Nearly all consumer electronics products are using SMPS nowadays.
