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LM10011: LM10011 vs UCD92xx-EP

Part Number: LM10011
Other Parts Discussed in Thread: TMS320C6678, UCD9244-EP, UCD9222-EP, UCD9222

Hi,

I need to power the variable core supply CVDD of TMS320C6678 multicore processor. As a smart-reflex solution, I can opt for either an analog controller LM10011 or a digital controller UCD92xx-EP.

What are the pros and cons of LM10011 and UCD92xx-EP?

I'm not able to determine on what cases should I go with LM10011 and on what cases should I go with UCD92cc-EP for the CVDD rail.

Thanks,

Binayak  

  • Binayak,

    LM10011 is just the VID DAC current source that is used to inject current into a single dc/dc converter FB node to adjust the output voltage up or down.  UCD9224-EP and UCD9244-EP are two channel/4 channel digital PWM controller with VID interface.  If you only want one channel, then LM10011 would be the the nest choice.

  • Hi John,

    Thanks John. These are follow-up questions for further clarificaion:

    [1] But which one is better in terms of performance (one is analog and the other digital)?

    [2] LM10011 looks less complicated than UCD92xx-EP. Are there any known issues that I might face when implementing LM10011? 

    [3] I've got two TMS320C6678 on my board at different locations. I was thinking of using two LM10011 instead of one UCD9222-EP if both devices perform equally. Your advice?

    [4] TI website is now not recommending UCD9222, but says nothing about UCD9222-EP. Is UCD9222-EP also getting obsolete? If yes, are there any new recommendation in place of UCD9222-EP to power the variable core CVDD of TMS320C6678?

    Thanks and regards,

    Binayak

  • Binayak,

    LM10011 is "probably" a simpler solution.  You will need to select a separate buck converter to work with LM10011 and that will answer your question as to "which is better in terms of performance".  LM10011 is just a DAC.  If your TMS320C6678 are located far away, you may want separate point of load regulators.  If they are relatively close, you can place a dual supply midway between them.  It all depends.

    UCD9222-EP is supported by a completely different group.  Let me see if I can reach out to them to comment.

  • Hi John,

    Thanks John!

    I'll be waiting for further information on UCD9222-EP availability aspect.

    Regards,

    Binayak

  • Binayak,

    UCD9222-EP shows as "Active".  However there appears to only be 1825 pcs in stock at arrow as the only available inventory.  If you need additional information I recommend starting a new thread using UCD9222-EP as the part number.

  • Hi John,

    I posted a new thread in the forum. UCD9222-EP is still pretty active and no future plans as of now to make it obsolete.

    Thanks for your advice.

    Regards,

    Binayak