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TI Home » TI E2E Community » Support Forums » Power Management » Digital Power » Digital Power Forum » UCD9222 +UCD7242 output 0
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UCD9222 +UCD7242 output 0

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guoping Lee
Posted by guoping Lee
on Jul 25 2012 04:37 AM
Intellectual980 points

Hi everyone .

there is UCD9222+UCD7242 in my project about 6678.When I configure the UCD9222 through PMBus adapter,the UCD7242's output is zero.I find out that the DPWM1A and DPWM2A is 1.65V,so the UCD7242 shut the HS and LS.Does somebody know why the DPWMA is 1.65?
my configure file is the project file which is used in 6678evm,and I have pulled up ENA1 and ENA2,also the CTL.thanks.

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  • Vladimir Podgoretskiy
    Posted by Vladimir Podgoretskiy
    on Aug 02 2012 08:17 AM
    Intellectual570 points

    We have also programmed UCD (9244) over PMBus by C6678. Each configuration command (byte, word, block) was validated by reading it back. But there is no PWM pulses from UCD9244, DPWM output is 1.65 V too (3-stated and pulled to 1.65 V by UCD7242 internal resistors). guoping Lee or anybody, did you solve this problem? TI's representatives are so quite...

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  • guoping Lee
    Posted by guoping Lee
    on Aug 13 2012 02:58 AM
    Intellectual980 points

    Hi Vladimir Podgoretskiy

    We did not solve the problem.Do you know how to solve it?thanks

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  • jack hu1
    Posted by jack hu1
    on Aug 29 2012 01:56 AM
    Prodigy50 points

    HI,I have met the similar problem as you ,have you solved  the problem yet? Could you give me a reply? Thanks

    UCD9244 output 0
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