How does ATX power supply work?
ATX power supplies are turned on and off by a signal from the motherboard. They also provide a signal to the motherboard to indicate when the DC voltages are in spec, so that the computer is able to safely power up and boot. The most recent ATX PSU standard is version 2.31 as of mid-2008.
What does the power supply unit do?
Despite the name, Power Supply Units (PSU) do not supply systems with power – instead they convert it. Specifically, a power supply converts the alternating high voltage current (AC) into direct current (DC), and they also regulate the DC output voltage to the fine tolerances required for modern computing components.
What is 5VSB on a power supply?
5VSB is a standby voltage that may be used to power circuits that require power input during the powered- down state of the power rails. This power may be used to operate circuits such as soft power control.
What is the 3.3 V on the power supply?
Positive DC Voltages Usually, the digital electronic components and circuits in the system (motherboard, adapter cards, and disk drive logic boards) use the +3.3v or +5v power, and the motors (disk drive motors and any fans) use the +12v power. Table 3.1 lists these devices and their power consumptions.
What is difference between AT and ATX power supply?
AT-style computer cases had a power button that is directly connected to the system computer power supply. An ATX power supply is typically controlled by an electronic switch. Instead of a hard switch at the main power input, the power button on an ATX system is a sensor input monitored by the computer.
How do power supplies work?
A power supply takes the AC from the wall outlet, converts it to unregulated DC, and reduces the voltage using an input power transformer, typically stepping it down to the voltage required by the load. For safety reasons, the transformer also separates the output power supply from the mains input.
What are the 4 primary components of a power supply?
It is basically consisting of the following elements: transformer, rectifier, filter and regulator circuits. Power supply units (PSU) are used in computers, amateur radio transmitters and receivers, and all other electronic equipment that use DC voltage as an input.
What is 5vsb?
Distinguished. Nov 4, 2004 84 0 18,630 0. Sep 1, 2005. what is +5vsb?