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trying to find the ideal switcher IC

Harry
Expert 2920 points

Dear Forum,

I am searching for a switching IC that I can provide 15A preferred or at least 8-10A with a voltage range upto 50V or close. 

I tried to search for one in the product list but couldn't spot one that had all characteristics. probably I missed.

Is there anyone who can provide me with a suggestion?

I want to alter its design to make a constant current supply. its described below. the IC mentioned cannot souse such high current.  Im afraid if this IC is not available, I would have to bottom up design the whole circuit and if would take so much time I cannot afford to lose.

Any help would be so much appreciated.

This project is completed as a social service project. This circuit aims to provide power to a chemical extractor that  extracts a certain chemical dissolved in the water in that area. project has hope it will help people a lot.

  • 0
    TI__Genius 16025 points

    Hi Amalinda,

    Looks like WEBENCH is the perfect tool for you. It will help you select the right IC and provide schematics and PCB layout information for the application you are looking for.

    You can find this tool on the www.ti.com homepage, Bottom -right, and looks something like this

    Thanks,

    Anston

  • 0 in reply to Anston Lobo
    Expert 2920 points

    Actually I did try a lot of configurations in it before coming here. but nothing seems to work for even lower end figures. 

    Do you have in mind any switching regulators that can switch high currents till 15A or atleast 10A? 

    thanks

  • 0 in reply to Harry
    TI__Genius 16025 points

    Hi Amalinda,

    We don't have any Simple Switcher IC's that can directly accomplish this. Which is why Webench is throwing an exception. 

    I will repost this int the Non-isolated DC-DC forum to see if someone can help.

    We are also working on a design that might achieve this, but the earliest I can get this out to you would be end of the week.

    Thanks,

    Anston

  • 0 in reply to Anston Lobo
    TI__Guru**** 191445 points

    For a buck converter you will have to have an input voltage higher than the output voltage.  For 750 W, you are definitely looking at a controller and likely an isolated solution as well or possibly multi-phase.

  • 0 in reply to JohnTucker
    Expert 2920 points

    Dear Anston,

    In that case i'm feeling lucky! :) you know I was thinking, may be I can combine the outputs of two or more switched mode ICs to achieve this current? But I understand that outputs cannot be directly connected at the end. So there must be some sort of a method to stop them from sinking/sourcing to keep them from killing each other. What do you think of my previous idea?

    If you already know, could you please tell me a switched mode regulator IC that can pass at least 2-3A with approximately 50V output? If I can have that, then I can continue testing my idea on my initial diagram. 

    Well I am glad you are working on something similar. If you have any progress, please let me know and that would be so much helpful. 

    Dear John,

    yeah, I am well aware of that. i think that will be my next biggest hurdle. Creating a power suply that can source  such current at such a voltage. But I was thinking may be I should finish off the controller circuit first, test it and then move into to this. 

  • 0 in reply to Harry
    Expert 2920 points

    im wondering if there is an update.. 

  • 0 in reply to Harry
    TI__Guru**** 191445 points

    Are your input and outputs finalized?  If you still need 45-50 V input and 50 V output you are looking at an isolated solution.  Let me know.