![]() ![]() Therefore, Tesla had also solved the energy loss problem in the transmission pathways due to high currents as in electronic systems by using the POL power conversion. This idea was introduced in the time of the war of currents between the engineer Serbian-American Nikola Tesla and the American inventor Thomas Edison, while Tesla had proved the possibility of remotely transporting AC power at very high voltages. ![]() This power conversion at very near the receiving device is known as a point of load (POL) power conversion. In Figure 1, +12 V, –12 V, and 5 volts DC voltages are drawn from AC power to serve microprocessor motherboard or the hard disk drive.įigure 2 represents a PC motherboard where the microprocessor, peripheral cards and memory are embedded and supplied the previous power supply unit seen in Figure 1. Power supplies were commonly used and developed as a standalone integrated module in a personal computer (PC) that converts the AC power into many different DC voltage drops to supply other submodules using different electronic parts such as transistors, electrolytic capacitors and magnetic-core inductors. Power supplies appeared with tethered systems which are linked with electrical wire to a fixed electrical installation to transform, rectify and regulate the alternating current (AC) 110 volts/220 volts to another electrical form, +12 volts/+ 5 volts direct current (DC) which will be used by different system modules. In this paper, we will discuss the history of power supply, 3 types of power supply designs, power supply topologies and power supply design consideration. Power supply design plays a very important role within an electronic and embedded system. ![]()
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