Create a PS schema 3.3V/1.5A, 12V/1A, 17W

Posted by: luisnogueras on 12/17/2009

Hi all. I`m newbie in this. Can you help me to make a power supply? The output values are 3.3V/1.5A and 12V/1A. And the input value is 90-265Vac. Can I use any example design with a few modifications? I am not a PS manufacturer. I want integrate the PS in my designs.
Sorry, my english is bad. I'm from Spain.

Comments

Reference Design Kits, RDK-142, provide the essential materials to get started on your power supply design. All kits include samples, a fully functional reference board and complete documentation. You can order REK-142 online, or through your local sales representative or distributor.

It is 35W output power supply with 5V and 12V outputs, but you can modify it easily to meet your output requirements.

Thanks Skywalker. What you mean with "you can modify it easily to meet your output requirements". Is there to change the transformer or any discrete component? I would like to buy the RDK and make the modifications, but i need help. Thanks in advanced.

The outputs of RDK-142 are 5V and 12V, and your required outputs are 3.3V and 12V.

You need to change the transformer windings and feedback circuit components to meet your requirements.

And, it is easy?
I'm lost with this. Can I to modificate the transformer? Or, do I have to change completely?
Thanks Skywalker.

Well,

If an output voltage needs to be changed in a power supply, the transformer needs to be changed accordingly,,

PI Expert is the PI's transformer design tool you might want to use.

Thanks Skywalker. I'll look around and see if I get reported properly. Do you know if Power Integrations can design and supply the power supply I need? Thank you.

You can check our local sales office in Europe, eurosales@powerint.com, whether they will design and supply a power supply you need. I think the expected volume has to be pretty high (>100K/m) for them to design and supply a custom power supply.