AC/DC and Isolated DC/DC Power

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AC/DC and Isolated DC/DC Power

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  • Forum Post: 3.6kw PFC

    Izchak Zobel
    Dear All, I would like to ask for your suggestions. I have to build a 3.6KW Power Factor Correction Power Supply. Input voltage: 185-265VAC 50Hz. Output voltage 800VDC, output current 4.5A. I have seek for the optimized configuration. Thank you for your help. Best regards, Izchak...
    on Oct 2, 2011

  • Forum Post: SELV input power supply

    John Samperi
    1st post here. I have been trying to get this kind of power supply running for a while but I could not get enough stable specifications until recently. I have tried to get help from a couple of power supply chip manufacturers but did not get anywhere as everyone seem to cater for off main supply...
    on Oct 29, 2011

  • Forum Post: UCC28070 and line frequency

    CWilson
    Hi everybody! I'm soon going to design a 1800W SMPS with the following specs: - Input: Universal mains (85-264VAC) - Output: 400VDC. The converter should have a PF>0.99 at full load but preferably from 50% or even lower. My client is concerned about the input line frequency. Can the UCC28070...
    on Jan 12, 2012

  • Forum Post: Re: AC-DC power supply

    Ankur Tech
    Yes the voltage can vary from 18-24V , so automatically the current vary. Such that if the provided schematic having particular resistor & by changing it i can adjust my desired voltage. Regards, Ankur
    on Mar 9, 2012

  • Forum Post: Is UCC28610 the correct device for the condittion?

    Go
    Hi,everyone, Can somebody give me advices that UCC28610 is suitable for the condition as follows, Isolated, max power 30W(5V/6A), flyback, input AC 18V - 30V(24VAC typ), easy to design reference designs if available. Actually I'm not sure if it is suitable or not. Thanks,
    on May 17, 2012

  • Forum Post: power factor correction,ucc2817

    yamuna R
    \ pls mail me the simulation model in pspice orcad for ic ucc2817, application for power factor correction, it is very urgent. for my m.tech project
    on Jun 7, 2012

  • Forum Post: RE: ucc28070

    Wu Wei Yi
    Hi,all. We are in process of designing PFC with UCC28070 integrated circuit.Power is 300W, 110V input voltage, 60HZ line frequency,180V Output, 100kHZ switch frequen. I used the application note and excel design tool, The result of input voltage(Vin) , input current(Iin) & load voltage waveforms...
    on Jun 26, 2012

  • Forum Post: RE: ucc28070

    Wu Wei Yi
    HI, the waveforms of Vds(switch voltage) , Ids(switch current) , Id( output of the diode bridge current) and Vgs(gate signal) looks for errors. I hope you may from the waveform to give me some circuit recommendations. Thank you for your help. Regards, Yi
    on Jun 26, 2012

  • Forum Post: RE: AC-DC Power Design Services Firm

    William Friesen
    Jaden I might be able to find you what you are looking for but I have some questions first; Do you have a target BOM cost? Number of units per year? Do you have a foot print of which you need to fit inside? What are the options for heat management? Will this need to be enclosed? Are fans and...
    on Jun 26, 2012

  • Forum Post: RE: ucc28070

    Wu Wei Yi
    Hi, If it happening. How should I check this circuit? Thank you. Yi
    on Jun 27, 2012

  • Forum Post: AC-DC Power Design Services Firm

    Jaden Ghylin102047
    Who does TI recommend for design services on high power AC-DC power supply designs? Requirements are 85-264VAC, 400-800W out at 24VDC with 85%+ efficiency. Are there a few firms that have experience with TI/Unitrode parts: UCC28070PW, UCC28950PW, etc.? -Jaden
    on Jun 21, 2012

  • Forum Post: UCC25600 variable dead-time

    Laszlo Lorantfy
    Dear fellow engineers, I have come up with an idea about UCC25600. The dead-time should be calculated for maximum input voltage and no load (minimum primary current). When the load increases, input votlage dicreases the switching frequency will decrease so there will be more pimray current, whats charges...
    on Oct 31, 2012

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

    Ian Overholt
    Hello, I am developing an audio power amplifier with a PFC pre-regulator using the UCC28070 with interleaved power sections. Maximum output power of the PFC supply is about 6000W and it delivers that power between 100 and 240VAC. The PFC supply is followed by a resonant DC-DC converter to provide isolation...
    on Nov 29, 2012

  • Forum Post: UCC35702 - maximum duty cycle

    Wm Blum
    Working on an implementation of UCC35702D as a off-line buck convertor. Having issues with achieving 99% duty cycle. 1. Output level is controlled by introducing voltage to the VSclamp pin. I can control VSclamp from 0 to 3V. 2. FB pin is connected to Vref via a 1K resistor. FB sits at 4.90V. 3...
    on Feb 13, 2013

  • Forum Post: UCC2806 Soft Start functionnality

    Jean-Jacques Avenel
    Hi, on UCC2806 there's no specific soft start pin, is it possible to realize this function with external components please ? UC2846 seems very similar to UCC2806 and we can see page 10 of UC2846 DS an example of soft start function with a simple capacitor in // with resistor divider connected on...
    on Oct 19, 2012

  • Forum Post: SMPS 28VDC@4 amps - UCC3813 and PMP3029

    sanjeev kumar87916
    Hi all, I am looking for a reference design(schematic+BOM) for switch mode power supply(SMPS) with the following specifications and having LOW BOM cost. Input voltage: 230V AC, 50Hz Output voltage: 28V DC @ 4 amps. If anybody can send me the reference schematic and BOM, that will be a great...
    on Mar 26, 2013

  • Forum Post: Superimpose DC output with Sine wave

    Fred Kleytman
    I have AC - DC linear PS that is controlled by uA723 For my product test purposes I would like to be able to modulate output voltage with sine wave using sweep generator. AC - DC linear PS Vout max = 16V; Modulation Vp-p=4V; Modulated Vout max = 16V Vout min = 12V Frequency range 50HZ - 20kHz ...
    on Apr 26, 2013

  • Forum Post: RE: UCC28070 OVP problem at load step?

    Ralph Saunders
    C Wilson: I use 1>3 28070's in a 2-4-6 phase regulator and have minimal overshoot problems. My load is a bit different in that I have a large pulse discharge and then the boost function refills the cap bank. Ensure you don't have too much filter cap on both the vinac and the vsense inputs...
    on May 9, 2013

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