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3kw PFC
Related Posts

  • Forum Post: PMP 4259 Schematic- wrong link on webpage

    Kevin Berg
    Hi, I was trying to find the schematic for the 3KW PFC referenced under PMP 4259. On the page dedicated to the PMP 4259 design, all of the links are correct for the BOM, control board schematic,control board BOM, power BOM except for the power board schematic. When you click on it it brings...
    on Feb 1, 2012

  • Forum Post: duty-cycle of pwm comparator of uc1525

    Yingyu Sun
    hi, the datasheet of uc1525 states that the maximum duty-cycle of pwm comparator is 50%, i have the some confuse that the maximum duty-cycle should be 100% according the block diagram in the datasheet. would please tell me wy the maximum duty-cycle of pwm comparator is 50%?
    on Jun 2, 2012

  • Forum Post: 3,500W pfc with 240VAC +/- 10% input, 390VDC output

    adam cohen1
    we are selecting a pfc front end circuit to our volt-hertz 3 phase 3,500W ac drive. the input is NOT universal but 240VAC +/- 10% single phase, and we would like an output of around 385VDC. Could someone recommend the best topology for this, single, interleaved or bridgeless. If interleaved is the way...
    on Nov 14, 2012

  • Forum Post: RE: 3,500W pfc with 240VAC +/- 10% input, 390VDC output

    adam cohen1
    Hi John, thanks for your suggestion, however, the input is a single phase 240VAC, 3,500W capacity. TI offers over 70 pfc chips with different topologies. There is probably a preferred TI chip and topology for this requirement, as well as a sample design that is close. That's pretty much what I am...
    on Nov 20, 2012

  • Forum Post: RE: UCC28070 Hi-line light load current fidelity

    Donovan Davidson
    Ian, I have found this to be a problem in universal range PFCs at high line even at full load and found the soultion was to increase the value of the PFC inductors as much as I could. The issue is that when DCM mode is reached the MOSFET switching voltage rings and this is particularily severe with superjuction...
    on Nov 30, 2012

  • Forum Post: UCC28070 - Duty Cyle

    Ercan Aktas
    Hello, We using the UCC28070 for a 3.3kW charger. In case of high duty (>85%) and low duty (<15%) the pulse width of phases A and B are not symmetrical. Dont worry about the current signals. We use a coupled choke. If the pulse width is asymmetrical the coupled choke can saturate. We...
    on Jan 16, 2013

  • Forum Post: RE: PFC-UCC3817 or UCC3818

    Nilson Lucca
    Dear friends, Could somebody explain the main difference between the UCC 3818A and UC 3854 A/B PFC ICs?
    on Feb 12, 2013

  • Forum Post: RE: PMP 4259 Schematic- wrong link on webpage

    alain jeanneaux1
    Hello are the PCB's available or Gerber files? The Power PCB as no ref for components Alain
    on Mar 11, 2013

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