SMPS Power Detection

anusoni · 30-10-2004, 11:57 PM

Hi all been a long time since i posted, anyway wanted to know, how to determine if the 300WATT SMPS Frontech i have is actually a 300WATT SMPS or some lesser cheaper variant !
Also Anybody from chandigarh can guide me to a place here where i can buy good BRAND SMPS's ! ?
Also the ampere ratings written on the side of an SMPS, Do they mean anything ? how much minimum should they be for a regular system with 400Watt SMPS ?

AlienTech · 31-10-2004, 04:38 AM

Amps = Watts/Volts.
So 400 watts would be 400W/240V = 1.66 Amps. This only means the input usually. The output would be like 60-80% of this figure. Usually 250 watts would mean it needs a 240V supply at 1Amps. Providing like 20Amps 5V and 4Amps 12V. (100 watts + 48watts) with 50 watts going for the -12V, 3.3V and others.

30-10-2004, 11:57 PM	#1 (permalink)
anusoni Apprentice Join Date: May 2004 Location: Chandigarh Posts: 71	SMPS Power Detection Hi all been a long time since i posted, anyway wanted to know, how to determine if the 300WATT SMPS Frontech i have is actually a 300WATT SMPS or some lesser cheaper variant ! Also Anybody from chandigarh can guide me to a place here where i can buy good BRAND SMPS's ! ? Also the ampere ratings written on the side of an SMPS, Do they mean anything ? how much minimum should they be for a regular system with 400Watt SMPS ? __________________ ~Therez a difference between knowing the path and walking the path ~

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31-10-2004, 04:38 AM	#2 (permalink)
AlienTech In The Zone Join Date: Sep 2004 Posts: 433	Amps = Watts/Volts. So 400 watts would be 400W/240V = 1.66 Amps. This only means the input usually. The output would be like 60-80% of this figure. Usually 250 watts would mean it needs a 240V supply at 1Amps. Providing like 20Amps 5V and 4Amps 12V. (100 watts + 48watts) with 50 watts going for the -12V, 3.3V and others.