Why should go through the cross - straight - pay - straight conversion, rather than directly after the transformer buck after rectification, filtering, switching power supply is not a way to reduce costs?
Parallel power supply is significantly better than switching power supply, why no one tried to do one?
Because this out of the voltage is more stable ah, do not you want your computer will be a bright one, and finally smoke ah!
Just for the boot convenient, do not switch how you boot? Shut down the general use of the system off. Power on the shutdown is a longer process. A part of a part of the start off. More details later say
Switching power supply does not only play the role of power switch, but also can be set to sleep, the role of deep sleep
1: Because the transistor can only work in the DC environment. So the first power into a DC and then through the shock circuit (oscillation frequency of 30 ~ 50KHZ) shock coupled with the required voltage. Coupled voltage is alternating current, so it should be collated into the DC power supply circuit.
????2: Transformer and switching power supply comparison. Coupling circuit in the high-frequency environment than the efficiency of the transformer efficiency, so the switching power supply transformer can be done very small. The cost of switching power supply is indeed much lower than the cost of the transformer, and small size, light.
?????3: switching power supply elegant range is very large, good switching power supply can change in the 100V power grid in the normal work, if the grid voltage down to 150V or even lower, the transformer I am afraid you can not output the required voltage The Computer on the voltage requirements are very high, once the voltage changes will work unstable or even crash, hardware burned. Switching power supply can be very convenient to use the computer to control the open, shutdown, in the shutdown state, the power output only 1V voltage to the motherboard to do control signals, other such as 12V, 5V and other circuits are not working. So more power. In summary: switching power supply is the best choice for the computer.
