switching power adjustable ! - Electronic Circuits Projects Diagrams Free

thaithanh · 3rd November 2008, 06:37 AM

I want made a switching power with output volt adjust 0.5-12 v 10A,but i cant see any circuit diagram from google .Please give me an idea.

Hero999 · 3rd November 2008, 12:50 PM

That's because you have to design it for yourself.

A good start is to research existing designs as a basis for your design.

thaithanh · 4th November 2008, 01:04 PM

Thanks !
I have some switching power , I understand principle of them but I want output volt adjustable. I think somebody can give me some idea !

Hero999 · 4th November 2008, 01:14 PM

You either vary the voltage referance or the feedback network. If you know how a switching regulator works then it sholudn't be hard to figure out.

thaithanh · 4th November 2008, 01:22 PM

Thanks!
If i made without feedback . Any Idea ?

**Nigel Goodwin** · 4th November 2008, 02:08 PM

Quote:

Originally Posted by thaithanh

Thanks!
If i made without feedback . Any Idea ?

You NEED feedback!.

Willbe · 5th November 2008, 08:29 PM

And messing with the guts of a switcher might cause other problems that only switcher designers would know about.

I'd search for an IC switcher chip that offers variability; if none exists I'd say you're biting off more than most people can chew.

You might be able to do a switcher followed by a linear. 10A is not that much nowadays.

jpanhalt · 5th November 2008, 10:33 PM

You might also try the National Semiconductor website to see whether a Simple Switcher can be adapted to your use. The need for a 0.5V output may be a problem. At least, you can try various combinations of input/output/current and get National's feedback on which of your requirements excludes any of its products. Here is the link: Power Management Home - Simple Switcher, LED Drivers, LDO, Power Supply, Voltage References, Lighting, Battery Management, Voltage Regulators, Vregs, DC-DC Voltage Converters

John

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3rd November 2008, 06:37 AM	#1
thaithanh	switching power adjustable ! I want made a switching power with output volt adjust 0.5-12 v 10A,but i cant see any circuit diagram from google .Please give me an idea.

3rd November 2008, 12:50 PM	#2
Hero999	That's because you have to design it for yourself. A good start is to research existing designs as a basis for your design. __________________ I do not answer private messages asking for help because no one else can: benefit from advice I may give or correct me if I'm wrong. Please ask on the open forum if you have a question and I'll be happy to help, if I know the answer.

4th November 2008, 01:04 PM	#3
thaithanh	Thanks ! I have some switching power , I understand principle of them but I want output volt adjustable. I think somebody can give me some idea !

4th November 2008, 01:14 PM	#4
Hero999	You either vary the voltage referance or the feedback network. If you know how a switching regulator works then it sholudn't be hard to figure out. __________________ I do not answer private messages asking for help because no one else can: benefit from advice I may give or correct me if I'm wrong. Please ask on the open forum if you have a question and I'll be happy to help, if I know the answer.

4th November 2008, 01:22 PM	#5
thaithanh	Thanks! If i made without feedback . Any Idea ?

5th November 2008, 08:29 PM	#7
Willbe	And messing with the guts of a switcher might cause other problems that only switcher designers would know about. I'd search for an IC switcher chip that offers variability; if none exists I'd say you're biting off more than most people can chew. You might be able to do a switcher followed by a linear. 10A is not that much nowadays. Last edited by Willbe; 5th November 2008 at 08:30 PM.

5th November 2008, 10:33 PM	#8
jpanhalt	You might also try the National Semiconductor website to see whether a Simple Switcher can be adapted to your use. The need for a 0.5V output may be a problem. At least, you can try various combinations of input/output/current and get National's feedback on which of your requirements excludes any of its products. Here is the link: Power Management Home - Simple Switcher, LED Drivers, LDO, Power Supply, Voltage References, Lighting, Battery Management, Voltage Regulators, Vregs, DC-DC Voltage Converters John