200W PC power supply switching 110V-220V

Sunday, August 10th, 2008

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This be PC power supply for Computer again interesting circuit. May advantage with friends at do an occupation can repair a computer? By think be the character Switching power supply 200W sizes take AC Voltge Source 2 level be 110V and 220V choose can use leisurely. And still use volt [...]

Old power supply computer by TL494

Friday, August 1st, 2008

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An elder brother of me works about repair a computer. Once meet a problem power supply Switching , of a computer s lose. It is old circuit. I then help to seek give. Get this circuit think may disagree. But enough use can replace. if friends meet same this problem [...]

A Compact 36-72V DC Input, 3.3V-10A Output Power Supply

Friday, June 13th, 2008

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The output of this power supply is an isolated 3.3V/10A output, produced from an input is 36-72V DC. Airflow is required at higher ambient temperatures to get the full rated power.
The topology used is a single transistor forward, with a reset winding on the transformer to reset the core. The maximum duty cycle is less [...]