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digital power selection

Jenny Lu69
Expert 1810 points
Other Parts Discussed in Thread: UCD3138, UCD3138128

Hi sir,

I have some difficulties in digital power selection.

Actually I want to design a  digital power, transform from ac220v to dc0-48v, the current is 30A. It needs isolation, at the same time has PDC and PWM, the PFC needs double tube alternate work, and PWM needs H full-bridge. In addition, 5 temperature sensor interface, around 20 GPIO LED interface, and 1 UART interface,5 buttons are needed. Please help me to select a controller, and some other hardware or software tool to  support it if possible.

Thanks a lot.

Best Regards,

 

  • 0
    TI__Expert 4040 points

    Hello Jenny,

    An engineer is looking into your question and will reply with further guidance.

    Amiel

  • 0 in reply to Amiel Hussain
    TI__Genius 17090 points

    I'm not aware of anyone doing what you describe with a single processor.  Generally they use two, one on the primary side and one on the secondary side.   

    Depending on what your requirements are for Power Factor, THD, power metering, efficiency, and so on, our devices can go from less than 50% to 100% loaded with just the PFC.

    The bigger issue seems to be the need to cross the isolation barrier with too much information.  Generally it gets cheaper to have two processors. 

    As far as memory and pins go, we should be able to meet your needs.  We have UCD3138 family devices from the UCD3138 itself, which is available with both 40 and 64 pins.  It has 32K bytes of program flash, 2K bytes of data flash, and 4K bytes of RAM.  The range goes up to the UCD3138128, with 128K bytes of ROM, still 2K bytes of data flash, and 8K bytes of RAM.  The 128A has 80 pins.  The data flash is intended for use for storing coefficients and fault data.  It supports up to 20K erase/write cycles and has small 32 byte pages. 

    We provide EVMs and sample codes for PFC, PSFB and HSFB, but you will need to do some power supply design and programming to get to a finished product. 

    All the devices support UART interfaces, and the 128 probably has enough pins to do what you want.  

  • 0 in reply to Ian Bower
    Expert 1810 points

    Hi Sir,

    Thanks for your patient interpretation. And I have read a substantial number of your answers in forum, which full of technical ability and patience.

    It is very nice of you, your reply will be helpful to me.

    Thank you again.

    Best Regards,

     

  • 0 in reply to Amiel Hussain
    Expert 1810 points
    Hi Amiel,

    Thank you. My question has been solved.