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input capacitor
Related Posts

  • Forum Post: Re: Burning TPS54331

    JohnTucker
    In most applications these regulators are used as point of load regulators to convert an existing bus voltage to a lower voltage. Th input voltage turn on is well controlled and the additional input capcitor is not required. There is an optional input capacitor in switcherpro (C1) that you can use if...
    on Jun 10, 2010

  • Forum Post: Re: Design with TPS40054

    Peter Miller13277
    I have found the following equation for calculate the input capacitor: C= (I * Vo) / (deltaV * Vin * fs), Where I= max. output current, Vo= output voltage, deltaV= ripple voltage, Vin= min. in put voltage and fs= switching frequency. ( http://focus.ti.com/lit/ug/sluu190/sluu190.pdf...
    on Jul 21, 2010

  • Forum Post: Re: +/- Output Power supply design help

    David Poston
    Hey Kyle! I'm a little new to power supply design myself! I've been doing it the "old school" way...I have some old paperback books about power supply design copyrighted in the 1960's. They show several high voltage supplies for running vacuum tubes and they even have some with...
    on Aug 10, 2010

  • Forum Post: Re: tps54325

    JohnTucker
    The al electro;ytic cap on teh input is in addition to the standard ceramic bypass capacitors. I have never tested with only aluminum electrolytic. I would not be surprised if there were a problem. Most dc/dc converters are very sensitive to the input cpacitor. They require a high quality ceramic very...
    on Oct 5, 2010

  • Forum Post: Re: TPS54231 startup issue

    JohnTucker
    It is entirely possiblre that is your problem. The TPS54231 requires a X5R or X7R dielectric ceramic input capacitor. An additional eletrolytic such as tantalum can be used as an addition to the ceramic cap, but you must have the ceramic and it should be located as close as possible to the VIN input...
    on Oct 15, 2010

  • Forum Post: Re: TPS5420 input capacitor sizeing - with Graetz bridge rectifier

    JohnTucker
    The TPS5420 data sheet provdides some information on input capacitor selection. I can give you some gneral guidelines as well. The 10 uF minimum of input bypass capacitance assumes a point of load application where the input voltage source is located close by the converter. In that case, the input voltage...
    on Nov 8, 2010

  • Forum Post: TPS5420 input capacitor sizeing - with Graetz bridge rectifier

    Miklos Lammel50528
    Hi! I planning to use the TPS5420 and I have a question regarding this IC. Facts: As voltage input I have a 230V/22V toroid transformer, and a Graetz-bridge rectifier. It means that my input voltage is 22V*sqrt(2)=31,1V peak. Usually for the linear voltage regulators the circuit needs...
    on Nov 8, 2010

  • Forum Post: Re: Low-ESR capacitor for TPS54310

    JohnTucker
    That looks to be a non-polarized ceramic capacitor. Even though the ESR is not specified it is probably low. However I do not recommend using Y5V dielectric in this application. You should use X5R or X7R.
    on Apr 22, 2011

  • Forum Post: External Current-Boost for MC33063 buck converter

    Renjith Narayanan
    Hi For my project i want to use a dc-dc converter input 24V Output 5V,1.5A I am using MC33063 with external current boost transistor (npn), is anybody worked in this circuit Also please share the critical points to be taken care Any answer in this will be appreciated With Best...
    on Apr 28, 2011

  • Forum Post: supporting circuit for UCC39413

    Mark Arnold78985
    Dear all, I would like to characterise the working behavior of the UCC39413 voltage boost converter. I use a 0 to 5 V power supply and a triangular voltage profile to characterise the startup and shut-down behavior. But even though I variated the values of supporting capacitors and inductors, the...
    on Jul 12, 2011

  • Forum Post: Input cap placement

    Titusc
    Hi there, When placing an input capacitor to a switcher, should I place it as close to the switcher or as close to the power input connector? Do I want to get rid of the noise as soon as possible? or try to minimize the input current loop? Any help is appreciated! Thanks, TC http:/...
    on Apr 11, 2012

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