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  • Forum Post: PTD08A006W Faults on shut-down

    EDGAR BROWN
    We have a design with an UCD9240 and three single-phase power rails using the PTD08A006W. We are having some trouble debugging start-up problems as the system seems to log faults on all the rails during shut-down (it could be start-up, but this seems less likely). After what seems like a normal shut...
    on Dec 20, 2010

  • Forum Post: Re: UCD9240 temperature issues on start-up

    EDGAR BROWN
    After more testing and some board modifications we realized that the problem was not the UCD9240 but the PTD08A006W modules, the faults seemed to be _somewhat_ legitimate. Under hot conditions the module voltage might be transiently dipping below the minimum of 4.75V causing an apparent drive transistor...
    on Jan 6, 2011

  • Forum Post: PTD08A006W 5V operation

    EDGAR BROWN
    We have several similar designs using a UCD9240 in a system driving either three or four PTD08A006W to provide multiple (single phase) rails. These rails are relatively low-current (considerably below rating), and we only use the PTDs for design expediency. After some issues (many of which can be found...
    on Jun 2, 2011

  • Forum Post: Re: 5V operation of PTD08A006W

    EDGAR BROWN
    Mark, We finally figured the problem out. It was not Noise after all (at least not in a simple way), but it was not inrush current either (again not in a simple way). After much probing we realized that several of the systems had a ~60kHz ~20mV to ~40mV oscillation on the 3.3V power (small enough...
    on Jun 16, 2011

  • Forum Post: Fault signal during start-up

    Andy4678
    Hello, I am using the UCD9240 and a PTD08A010W to provide the power for a 3.3V rail. There are a couple of devices on this rail and when I power it up with an external lab supply I get around 1.1A which is about what I expect when I add up the individual supply currents for all devices on this rail...
    on May 24, 2012

  • Forum Post: RE: UCD3138LLCEVM-028 registration

    peter lo
    I had same isseue. Asner electronic(Ted Hung) is a Taiwan company & just placed order to by UCD3138_PFC_026 & LLC_028 EVM_Kits. I am a chief firmware& app engineer , knew details about LLC&PMBUS C++ applications. How could get both frimware code? Regards, Peter Lo
    on Jan 10, 2013

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