I need oscillator design which can convert 12vdc to 15vdc 2to4amp which must include chopper and better if it includes UC3843 ic
Thanks

 

That is not the best part for the job. Is this school work?

The datasheet and app notes have examples only of off-line isolated converters. Since what you are after is a non-isolated boost converter, there are other parts designed specifically for this. Consider the LT1270A.

ak

 

I need oscillator design which can convert 12vdc to 15vdc 2to4amp which must include chopper and better if it includes UC3843 ic
Thanks

An oscillator, by itself, will not do the job. What you need is a boost converter, which is a type of SMPS (Switch Mode Power Supply). A very good starting place will be Hart, Daniel, Power Electronics, Chapter 6. It is available online as a freely downloadable ebook.

Before you get started, you must know the immutable rule of ALL power conversion schemes, and it is this:

The power output will always be less than the power input. Sometimes it will be much less.​

15 VDC @ 4 Amperes = 60 watts. Assume for the sake of argument that your boost converter is 80% efficient (a reasonable target for your first design). The required input power will be 60 watts / 0.8 = 75 watts, and 75 watts from a 12 VDC supply will require 6.25 Amperes of current. Your boost ratio of 1.25 is certainly reasonable.

Careful layout, fabrication, and assembly of the PCB will be essential to the success of your project.

 

If you can build a converter that takes 12V at 2A and convert it to 15V at 4A there could be a Nobel Prize in it for you

 

If you can build a converter that takes 12V at 2A and convert it to 15V at 4A there could be a Nobel Prize in it for you

That's not the way I read it. I saw 12 V in, 15 V out, 2 to 4 A out.

ak

 

That's not the way I read it. I saw 12 V in, 15 V out, 2 to 4 A out.

ak

What he said!

 

If you can build a converter that takes 12V at 2A and convert it to 15V at 4A there could be a Nobel Prize in it for you

I agree with this statement, but I'm not sure the TS meant to say what you think he said.

 

No one read my question carefully everyone suggest me to use booster circuit which i didn't need. I was in need of oscillator circuit.
Any how my problem is solved and i build it by myself,
Thanks All.

 

No one read my question carefully everyone suggest me to use booster circuit which i didn't need. I was in need of oscillator circuit.
Any how my problem is solved and i build it by myself,
Thanks All.

I think you are off the mark here especially since you indicated the use of a UC3843, which is specifically designed for use in boost converters. That said you are completely entitled to inhabit your own personal reality if you think an oscillator can perform the function you described.

 

convert 12vdc to 15vdc 2to4amp

I am sorry, but an oscillator does not do this. It is not us who are communicating badly.

 

$6

https://www.digikey.com/en/products/detail/mean-well-usa-inc/DPUN02M-15/11482426

 

$6

Current - Output (Max)

67mA, 67mA

I don't think a 30 V, 67 mA device meets a 15 V, 4 A requirement.

Look at the size of the package, and think - is 632 watts per cubic inch really possible on this planet, and for less than $6 - ?

ak

 

$6

https://www.digikey.com/en/products/detail/mean-well-usa-inc/DPUN02M-15/11482426

That's not an oscillator, which is the claim by the TS that it is what he needs.

 

@Kaash58: Since you have solved it, can you tell us how? Then we might know what the problem was.

 

Any how my problem is solved and i build it by myself,
Thanks All.

Please share your schematic or solution sith us.

ak

 

Current - Output (Max)

67mA, 67mA

I don't think a 30 V, 67 mA device meets a 15 V, 4 A requirement.

Look at the size of the package, and think - is 632 watts per cubic inch really possible on this planet, and for less than $6 - ?

ak

Yeah, odd, it has "15v output" and "60W" listed in it's specs.
So yeah, specs must be wrong.
Sorry, didn't look deeper into the other "67mA" specs.