What are AC-DC ConvertersĮlectric power is transported on wires either as a direct current (DC) flowing in one direction at a non-oscillating constant voltage, or as an alternating current (AC) flowing backwards and forwards due to an oscillating voltage. This is to ensure it is safe, does not interfere with other people or contribute noise to the AC main power lines. More than this, it must have been tested and certified to do so – an expensive process. When you plug in anything to a mains plug socket, it must comply with legal certification standards in the country it will be used in. If possible, use a preapproved off-the-shelf plug pack. Without exception, this subsystem should be designed and implemented by a qualified expert. When the AC source is a mains power socket, great care must be taken to ensure an implementation is safe to use. Understanding the key concepts associated with AC-DC Converters and the practical alternatives available is a good start towards a successful design. Circuits often require an integrated AC power source as the optimum strategy to reduce size, cost or due to application specific needs.
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