![]() The output voltage of the power supply is regulated by feeding some of the output back to the integrated circuit that controls the switching transistors. Filtering is accomplished by using a combination of coils (also known as "chokes") and capacitors. This output is not pure DC however, and requires extensive filtering to remove the high-frequency "noise" that is generated by the rapid switching action of the transistors. The output of the transformer (which is now alternating current) is then rectified by special high-speed diodes to change it back to direct current. This is knownīetween B and C - Heatsink of high-voltage transistorsīetween C and D - Heatsink of low-voltage, high-current rectifiers Will rise, while shorter times lower the output voltage. Keep on for a longer period of time, the output voltage of the supply The output voltage of the power supply isĭetermined by the "on" time of the transistors. Transistors are switched, but also controls the amount of time that each This IC not only controls the speed at which the ![]() ![]() An integrated circuit is commonly used to control the ![]() A typical switching speed is around 40,000 cycles per second Voltage sources one positive and the other negative.Ī pair of transistors is then used to switch these high voltage suppliesĪcross the primary winding of a transformer. Two diodes and filtered by a pair of capacitors. In most switching supplies, the 110 volt AC input is first rectified by Modern power supplies are known as "switching regulator power supplies."
0 Comments
Leave a Reply. |