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TI Home » TI E2E Community » Support Forums » Power Management » Digital Power » Digital Power Forum » UCD9222+UCD7242
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UCD9222+UCD7242

UCD9222+UCD7242

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guoping Lee
Posted by guoping Lee
on Jul 28 2012 06:50 AM
Intellectual980 points

Hi everyone,

I am using UCD9222+UCD7242 for power supper to TMS320C6678,the power output should be 1v and 0.9v . the configure is just like the UCD9222 configure project in 6678evm.but when I active the power output,the result is wrong.as I know ,the duty cycle should be 1/12.but the result is more than 20%,why?any advise will be nice,thank you .

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  • Ashok Narayanan
    Posted by Ashok Narayanan
    on Aug 21 2012 17:57 PM
    Prodigy220 points

    Hello Guoping Lee,

    Where can i get the configuration file  for the 6678evm

    Thanks

    Ashok

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  • guoping Lee
    Posted by guoping Lee
    on Aug 21 2012 21:08 PM
    Intellectual980 points

    Hi Ashok

    you can download the UCD9222 configuration from http://www.advantech.com/Support/TI-EVM/6678le_download3.aspx.

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  • Ashok Narayanan
    Posted by Ashok Narayanan
    on Aug 22 2012 09:34 AM
    Prodigy220 points

    Thank you Lee, by the way did you get the UCD9222 issues solvedÉ

    Ashok

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  • guoping Lee
    Posted by guoping Lee
    on Aug 22 2012 20:12 PM
    Intellectual980 points

    not yet .Do you have any idea?

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  • Ashok Narayanan
    Posted by Ashok Narayanan
    on Aug 23 2012 10:13 AM
    Prodigy220 points

    Hi Lee,

    I am just going to use these ICs on my board which is still in design phase. So i donot have any results now.

    Any way from the graphs, not only the duty cycle is strange, even the output voltage is swinging until 2V. Does these graphs depict correctly what you see on your board when you probe it (output voltage and duty cycle)?

    Thanks

    Ashok

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