what are the difference between a UPS and PSU (power supply unit) for an information technology device?

 

Find what the initials "UPS" and "PSU" stand for and you have your answer.

 

Find what the initials "UPS" and "PSU" stand for and you have your answer.

i dont mean like that. I was going through a project paper that a power supply unit design for information technology device so that the boost power factor conversion stage utilized as half bridge converter. here a hold up time is considered for data storage if the AC supply is failure. I think UPS doing the same function like that.,thats why am asking the question.

 

Hello,

Have a look at the definitions that the wiki is giving:
https://en.wikipedia.org/wiki/Uninterruptible_power_supply
https://en.wikipedia.org/wiki/Power_supply_unit_(computer)

Bertus

 

In the context of your second question I believe the main difference is hold up time. A power supply would be able to keep its output in regulation for a couple of cycles after detecting and signalling a loss of mains power. This gives the system a chance to put things in order and to shut down without corrupting vital information in memory.

A UPS can keep a system running for many minutes or even hours after mains power is lost, allowing more data, including a job in progress, to be saved as well as avoiding corruption of vital information in memory.