Simply said it is a power supply that can adjust the output voltage or current. This is a conceptual circuit diagram of the power train of a typical atx computer power supply unit.
At And Atx Pc Computer Supplies Schematics
Desktop power supply wiring diagram. For clarity the parts responsible for miscellaneous auxiliary functions such as current limit fan control and ov. Most modern computer power supplies follow the atx convention. Here circuit power supply for computer 230w 220v. This schematic does not show the control circuitry thats why you see all mosfet gates and transistor bases are open. Built a pc power supply basically quite simple. A euro unit connector is for connecting to the socket and there is a power switch.
Transistor variable power supply 1a 0 30v. It was used for floppy drives and hard disks. The four pin peripheral power cable dates back to the original pc. It consists of a housing made of metal. A friend of me inquires about power supply switching circuit. Note that most schematics circulating on the internet depict old style psu with bipolar transistors and without pfc.
A computer power supply converts the ac power from the wall outlet into smaller dc voltages that power the various components of the computer. The diagram below shows a partial schematic of a 450 watt atx power supply. Adjustable power supply circuit. The author is noted usually directly in the schematic. In addition to the old at standard atx 20 has one extra voltage line available 33v a connector chain lined to the single 20 pin and a power on wire that allows software to turn off the psu. They output 33v 5v.
The detail is other a friend sees in the circuit be lucky sir. Out put 5v 12v 5 250w computer supply china circuit. 4 computer power supply 230w 220v. What is a variable power supply. It will keep a stable voltage when it has any load. It use ic tl494 and transistor.
That way your power supply only needs to have one 62 cable to be compatible with both 6 pin and 8 pin pci express connectors. But it still has the same characteristics as a fixed regulated power supply. Then if you have 2 fans on the back of your case you can string them together to the same power supply connection like you would do with christmas lights. This also helps to keep the computer wiring neat. 4 pin peripheral power cable connector. Its construction is typical for a modern computer psu with mosfet switches and active power factor correction pfc.
The pc power supply has at least one fan. On this page i collect the schematics of switching supplies for computers smps atx v 10 atx v 20 and some at which i found on internet. It regulates the voltages by rapidly connecting and disconnecting the load circuit switched mode power supply. Whenever your computer is on the fans will be on as well. At and atx pc computer supplies schematics. Atx specification includes not only power supply unit but also interface to case and motherboard.
There are power supply that work with multiple fans. Im not the author.
Gallery of Desktop Power Supply Wiring Diagram
