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Old 16th October 2009, 06:46 PM   #5201
alazira is offline alazira  United States
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Quote:
Originally Posted by Beftus View Post
You can use IRF9240P's and IRF240N's instead.
Quote:
Originally Posted by Nelson Pass
The output MOSFETs are the IRF240 N channel type (Q3) and the IRD9240 P channel type (Q4). They will want to have a voltage rating in excess of 50 volts, a current rating of about 15 to 20 amps, and a dissipation of about 150 watts. Comparable parts are widely available, and here I used Fairchild FQA12P20 and FQA19N20C.
This is indeed what it says under the F5 manuel under "Parts Selection." However figure's 5 & 6 show Q3 to be the P channel, not N. Be sure to follow the Figure.
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Old 17th October 2009, 04:52 PM   #5202
sekess is offline sekess  United States
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Default power supply configuration

Is there a preferred power supply configuration between the following two:

CLCRC or CRCLC ?

Or do they yield similar results?

Thanks,
Steve
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Old 17th October 2009, 04:55 PM   #5203
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Quote:
Originally Posted by sekess View Post
Is there a preferred power supply configuration between the following two:

CLCRC or CRCLC ?

Or do they yield similar results?

Thanks,
Steve
Steve,

I would suggest downloading PSUD (its free!) and start simulating your power supply. The program has a shallow learning curve, and gave me a better understanding of power supply component interaction.

d
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Old 17th October 2009, 05:01 PM   #5204
sekess is offline sekess  United States
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Default power supply configuration

Hey d to the g,

I've downloaded that pgm. I couldn't get it to simulate dual rectifiers like I have in my setup (like Nelson's power supplies).

I'll have a look at it again.

Thanks,
Steve
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Old 17th October 2009, 07:30 PM   #5205
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Quote:
Originally Posted by d to the g View Post
Steve,

I would suggest downloading PSUD (its free!) and start simulating your power supply. The program has a shallow learning curve, and gave me a better understanding of power supply component interaction.

d
Would you have a link?
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Old 17th October 2009, 08:43 PM   #5206
sekess is offline sekess  United States
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Default softwaer link

Hi bobodiouiasso,

Software

then click on PSU Desogner II

Later,
Steve








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Old 17th October 2009, 08:45 PM   #5207
Zen Mod is offline Zen Mod  Serbia
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Old 17th October 2009, 08:52 PM   #5208
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Old 17th October 2009, 09:04 PM   #5209
sekess is offline sekess  United States
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Default Psu ii

Being that Duncan's nprogram was brought up, I'd like to ask the following:

Does anyone know if it is possible to insert a double bridge in the circuit like the standard First Watt supplies?

I only see that a single solid state bridge is available for analysis.


Thanks,
Steve
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Old 17th October 2009, 09:15 PM   #5210
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