![]() Besides, an iron-core transformer works only up to about 10 kHz, and if we need something in 50-100kHz range, we need a ferrite core.įig. This is because, if the frequency of operation is increased, one can get away with using a smaller core cross-sectional area. For a given output power, an SMPS is lighter and smaller. 1: Author’s prototype of the 12V SMPSĪ switched mode power supply (SMPS) offers the same end results at a lower cost and higher efficiency. ![]() Presented here is a 1A, 12V SMPS that can help. The low-voltage AC output from the transformer is then rectified by two or four diodes and smoothed into low-voltage DC by large electrolytic capacitors. These power supplies have a bulky steel- or iron-laminated transformer that provides a safety barrier for the low-voltage output from the AC input, and reduces the input from typically 230V AC to a much lower voltage. The most popular and common supply is a 12V DC supply that can be easily derived from the household AC supply with transformation, rectification, filtering and stabilisation. Most electronics enthusiasts require DC power supplies to operate various devices and accessories. ![]()
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