Because this DC voltage also has AC voltage to some extent. One thing is clear in the step-down transformers of SMPS, that only variable DC supply is given as input in it.Īfter that this reduced voltage is sent to a rectifier and filter. This step-down transformer reduces the voltage level and gives the required voltage to all the components in the computer. A variable DC supply is given in this transformer. Just after this, a step-down transformer is installed. The main purpose of using it is to convert pure DC supply into variable DC. This switching technique is electrically operated. When it is on then it will send 220v and when it is off then it will send 0v. This means it can turn on and off from 15 to 50000 in 1 second. Its switching frequency ranges from 15 to 50 Khz. Which is made of a power electronic switch and is also called a high-frequency switch. So that it helps in extracting pure DC in the output.Īfter that, a chopper would have been attached. That’s why we use a filter circuit on it. That is, some AC components remain in that output. The bridge rectifier is used here and you must know that it does not give pure DC in the output. That is, it converts the 220v AC supply coming into the house into 220v DC. So that they convert the AC supply coming in the input to DC. For this reason, AC power is first inputted into the PSU through the wire.įirst, a rectifier and filter are used in it. SMPS is also called PSU (Power Supply Unit). The main function of SMPS is to supply power to computer hardware components, for which it converts AC current to DC and enables the device to run. only one wire comes out of that SMPS, by which we put that device in charge. Many wires come out of the SMPS installed in the computer, which supplies power to different parts of the computer. Talking about its size, it is like a small box, and the SMPS, which is used in the adapter, is even smaller than this. It is attached to the back of the computer and is attached to the power adapter in all other electronic devices such as laptops, mobiles, tablets and other gadgets. Only after that electronic device can run. This SMPS works by taking 220 Volt AC Input to generate Multiple Regulated DC Voltage.īasically, an SMPS converts Alternating Current (AC) into Direct Current (DC) and provides it to that device. But to run the circuit built inside all these electronic devices, Regulated DC power is required in different voltage ranges. All electronic device needs the power to run and we give that power from the 220 Volt AC line of the house. SMPS is an electronic circuit that switches electric power. It gives power to every single component in the computer such as the motherboard, RAM, hard disk, CD / DVD drive etc. It is the part of a computer that supplies power to the computer. The full form of SMPS is Switch Mode Power Supply.
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