What is Power Supply Unit of Computer?

WHAT IS POWER SUPPLY OF COMPUTER?
A power supply of computer abbreviated as P.S.U or power supply unit is the most important hardware unit of computer.The one who adapt the distribution of both current and voltages for standard used of computer systems.

The power supply unit converts the standard wall outlet electricity,typically 220 or 110 VAC or voltage alternating current.And it’s divided into low level voltages through the secondary circuits as outputs for the systems of computer.Each subassembly draws some electricity which is measured in watts.The typical Advance Technology(AT) and Advance Technology Attachment(ATX) clone come equipped with a 150 to 200 watts and the new form factor and more enhance processor needs a value of 400 to 900 watts.Most specially of the new attachment called SATA and firewire.Typically there are 20 pins of the output of the PSU, see the table below.

PIN
WIRE COLOR
SIGNAL
PIN
WIRE COLOR
SIGNAL
1 ORANGE 3.3 V 1 ORANGE 3.3V
2 ORANGE 3.3 V 2 -12
3 BLACK GND 3 BLACK GND
4 RED 5 V 4 PS_ ON
5 BLACK GND 5 BLACK GND
6 RED 5 V 6 BLACK GND
7 BLACK GND 7 BLACK GND
8 POWER GOOD 8 -5 V
9 5V_SYSTEM BOARD 9 RED 5 V
10 YELLOW 12V 10 RED 5 V

Variations in electrical power(such as spikes and surges) can damage your computer.For this reason be sure to use a surge protector on your computer.

When recommending or buying a power supply, check the following considerations.

LOW NOISE LEVEL- The most usual disturbance of a power supply is the FAN.There are higher required revolution or revolution per minute(RPM) to meet the standard level of the temperature.Some fans are quieter than others, unfortunately, they all make some noise.Before purchasing a computer or power supply, check to make sure that the fan is not excessively noisy.

AUTOMATIC OVERLOAD AND OPEN CIRCUIT SHUTDOWN- check if the power supply has overload protect.If a short or overload develops in the computer,the power supply will save itself by shut downing itself automatically.This features may save other components, as well as the power electricity consumption.

1. AVR (AUTO VOLTAGE REGULATOR)- AVR is a device use or equipped to regulates the current/voltages fluctuations.Which generates,monitors, and analyzes power for a more exact and reliable power for computer equipments capable of:
  • sense over voltage and under voltage of the input line
  • sense over current of the load
  • sense aberrations in the power lines such as: intolerable spikes transients,surges and sags,slow average fluctuations
  • maintains the output voltage within its tolerance(±1%)of the nominal voltage
  • responds/recover to input variations within one cycle or 0.16 seconds,usually termed as responds time.
  • audio/visual monitors or warnings
  • cut off power when such aberrations occur protecting the circuit itself and the computer and equipments.
  • delay time
TYPES OF AVR
SERVO MOTOR TYPE
MECHANICAL AVR
ELECTRONIC AVR
2. UNINTERRUPTED POWER SUPPLY UNIT OR U.P.S-
FUNCTIONS OF UPS
  • Provides continues power to critical line when power blockout occured
  • Improves/regulates quality fluctuations to sensitive loads
  • Protects load from voltage fluctuations
  • Noise and spikes caused by lighting
  • Electrical machines,appliances and motors                     
EQUIPMENTS THAT NEEDS
  1. Computer servers and on load in the event of power line failure terminals
  2. Telephone systems
  3. Communication systems
  4. Process control equipments
  5. Instrumentation equipments
  6. Security systems
  7. Life support systems
  8. Nuclear power parts
  9. Other sensitive electronic equipments
  10. Micro computers
UPS PARTS:  
1. Rectifier charger
  • converts AC to regulate DC
  • charges the battery
  • input power to inverter
2. Storage Battery
  • DC input to the inverter during voltage drops or upon failure of the normal AC line.

TIPS!
  • Use power rated P.S.U. if you have maximum hardwares in your computer and high rated processor like Intel i7 core.
  • Avoid overclocking of the processor if your not sure in CMOS/BIOS settings of your motherboard.
What is Power Supply Unit of Computer? Arnel Cartoneros 5 of 5
A power supply of computer abbreviated as P.S.U or power supply unit is the most important hardware unit of computer.The one who adapt...
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About Arnel Cartoneros

Arnel is a Blog creator and writer, A founder and publisher of www.combinebasic.com and www.nuggetro.info. Part time Computer Instructor, Computer And Electronic Technician, And performing job as Biomedical Machine Specialist. I'm an avid fan of social media and very interested in Technical information and innovation.

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