Computer Power Supplies Information on GlobalSpec

Computer power supplies convert alternating current (AC) line to direct current (DC) line, needed by the computer. Power supply style, DC output, AC input, features, and environmental parameters are all important specifications to consider when searching for computer power supplies.

Choices for power supply style for computer power supplies include ATX, FlexATX, microATX, AT, LPX, NLX, SFX, and TFX. There are a variety of computer motherboard styles and cases available. Most case styles have a corresponding power supply type. Common choices for DC output voltage include +/- 3.3 V, +/- 5 V, +/- 12 V, +/- 15 V, +/- 24 V, and +/- 48 V. The number of outputs, DC output current, and power are also important to consider. The DC output current is the output current corresponding to the primary DC voltage output. The DC output power is the output power of the device. AC inputs include input voltage and input frequency. Choices for input voltage include 115 VAC and 230 VAC. Input frequencies for computer power supplies can be 50 Hz, 60 Hz, or 400 Hz.

Common features for computer power supplies include fan cooled, integral heat sink, overcurrent protection, overvoltage protection, power factor correction, remote on/off switches, short circuit protection, and water cooled. Fan cooled power supplies have integral fans for cooling. Power supplies with a heat sink have an integral heat sink for cooling. Overcurrent protection is internal circuitry that limits or shuts down the current output in an overcurrent condition. Overvoltage protection is internal circuitry that limits or shuts down the voltage output in an overvoltage condition. When present, it is most usually found on the primary output. Power factor correction corrects the phase difference between voltage and current in order to optimize power output. A remote on/off switch allows the computer power supply to be controlled remotely. Short circuit protection is useful in the event of a short circuit on the load may include electronic current limiting and thermal resets with automatic recovery. Computer power supplies that are water cooled are cooled to maintain stability.

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Products & Services Related to Computer Power Supplies

AC Power Sources

AC power sources provide alternating power and typically have adjustable output values for the testing of component response at various voltage, current and frequency levels.

Current Sources

Current sources provide reliable current for electrical component testing and for powering specialized components.

DC Power Supplies

DC power supplies accept an input power and output the desired form of DC power. Common types of DC power supplies include linear power supplies, switching power supplies, DC-DC converters, and silicon controlled rectifier (SCR) type power supplies.

DC-AC Inverters

DC to AC inverters are used for converting direct current (DC) into alternating current (AC). They are also known as DC to AC converters.

DC-DC Converters

DC-DC converters accept DC input and provide regulated and/or isolated DC output in various applications including computer flash memory, telecommunications equipment, and process control systems.

Power Supplies

Power supplies are devices that produce AC or DC power. This grouping includes current sources, DC power supplies, AC-DC adapters, DC-DC converters, AC power sources, and DC-AC inverters.

RF Generators

RF generators and high frequency power supplies provide the power required for plasma generation, induction heating, and radar or communications applications.

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