Need a power supply design with TL494

You're kidding, right?

Continuying this annoying game of top posting.

If that's not too hard, just do it yourself. $35 is about what it'd cost you for some of us here to just receive and open you nice schematics.

Or I propose you a deal. I've my car to be fixed. Probably not too hard. I'll pay for the parts expenses and also for your travel expenses (on the basis of a bicycle travel, I'll pay the sandwiches).

Then I'll deal my hard won $35 against the $35 you'll win fixing my car.

Does this suits you?

-- Thanks, Fred.

"debugginglife" a écrit dans le message de news: snipped-for-privacy@e56g2000cwe.googlegroups.com...

solve

should

"Spehro Pefhany" a écrit dans le message de news: snipped-for-privacy@4ax.com...

That's the sad part of the story. He's surely not kidding at all.

Why would you think s/he is kidding?

Best regards, Spehro Pefhany

After your rude response i searched google and i found ti's application note "slvae05" page 13 "hard swithing for voltage controlled power supplies". it takes less than 15 minutes. 35$ is nice money for 15min to 60 min searching net.

maybe u might earn 2.000.000 $ for your designs good luck

You just need a $35 design to blow up in your face to help you see the light, don't you? You obviously don't understand the first thing about what you're asking. There you have yourself a $35 lesson, we'll call it even for the laugh you gave me.

You are spending too much time for a well paid person you can earn

Ah, yes, yet another applicant for position of village idiot. PLONK!

...Jim Thompson

Do you really have that many mirrors around to see yourself thousands of times? ;-)

all he needs is two mirrors.

perhaps he could pay out a portion of that plump prize purse and purchase a pair.

Cheers Terry Cheers Terry

On Wed, 10 May 2006 08:12:28 -0700, Jim Thompson wrote in Msg.

Sometimes I make the mistake of following such threads four or five posts deep, and then think: This has GOT to be a "google groups" poster. Then I take a look at the headers, and sure enough... I'm always dead-on with this. 100%. A certain level of imbecility ONLY comes through google.

robert

I know that trick, but I was just trying to confuse him. ;-)

You can't solve the heat problem because you don't know how to drive the MOSFET. The gate voltage has to exceed Vin+10V minimum in order to realize RDS,ON=0.04 ohms. AND ARE YOU DOING THAT?!!!! Hell no. So what you do is either go to a P-channel or stay with the N-channel and use something called a "high-side" driver like the Micrel MIC5021, available from Digi-Key, and shown here:

That's my guess too as to what's going on, but the MIC5021 will double his parts cost. Of course, designing a cheaper driver with discretes will cost time and/or money too.

Best regards, Spehro Pefhany