AC/DC and Isolated DC/DC Power

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AC/DC and Isolated DC/DC Power

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UCC25600
Related Posts

  • Forum Post: Power Saving Problem on UCC28061+UCC25600

    Brian Wang0928
    Hi, The customer is now surveying a 250W adapter power and it can meet Energy Start 2.0 Application: Adapter power for medical/industry I/P:90Vac~264Vac; O/P:12V SPEC: Follow Energy Start 2.0 (Especilly for that the input power has to be less than 0.5W when no output current at 110Vac/230Vac...
    on Jun 14, 2010

  • Forum Post: LLC Resonant Half-Bridge Converter - Power Seminar

    Darko Ostojic
    Hello, In "Designing an LLC Resonant Half-Bridge Power Converter" presented in power seminars by Hong Huang, there is a graph on peak gain vs. Q on p. 22 that does not correspond to previous graphs (gain vs. frequency, seem correct). Can somebody (possible the Author) explain where it comes...
    on Jun 21, 2010

  • Forum Post: Re: UCC25600 Based 3KW LLC DC-DC converter

    CWilson
    I've used the UCC25600 up to 550W (designed to 800W). The LLC is great below 1kW but has the disadvantages as described above IF you're regulating the output. I designed mine as a chopper at the resonance frequency (unregulated), which gave me around 97% efficiency at 520W (for LLC alone). ...
    on Feb 3, 2012

  • Forum Post: Re: 800W resonant converter using UCC25600

    CWilson
    I've designed a LLC with almost the same specs ;-) Power: 800W output Non-isolated: 85-264VAC (PFC UC28061) to 400VDC. Isolated: 400VDC to +/- 82VDC (165VDC from + to -) (LLC). Unregulated! fsw = 100kHz. I managed to get 510W out due to the lack of load resistors. I got around 97% efficiency for...
    on Feb 7, 2012

  • Forum Post: 500W 650VA LLC HALF BRIDGE STEP-UP DC-DC CONVERTER using UCC25600

    Huzaif Ali
    Pl, refer to my design and assist me further for prototyping hi-efficiency 500W 650VA LLC HALF BRIDGE STEP-UP DC-DC CONVERTER with fsw 60kHz. Design param Vin_min: 10,5V Vo_max: 375V Io-max: 1,35A Can I use MOSFET for primary side with zener anti-parallel diode (body diode...
    on Feb 6, 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: switching frequency for UCC25600 LLC controller

    sm3447
    Hi, I understand in the market, LLC design is getting popular and most IC vendors make the controller available for this topology. It seems the reference designs from them are all under about 140k Hz. What is the issue if it moves to above 200kHz or more? Of course, the higher switching frequency...
    on Feb 5, 2010

  • Forum Post: RE: SLUC146 and UCC25600

    Jack.Leung
    Hi, Hong, 1. I use ucc25600 with typical application. I found that when DC-DC converter is soft-starting , OCP trigger signal will acvtive in OC Pin of UCC25600. how to solve this problem? 2. if the converter run resonance frequency /switch frequency as 200KHz, the frequency range of LLC IC UCC25600...
    on Apr 7, 2013

  • Forum Post: UCC25600 Based 3KW LLC DC-DC converter

    Cristi Vasilache
    I have to design and build a AC-DC converter which will have to deliver 25V DC at 120A and the efficiency must be above 90% including the PFC stage, so the DC-DC converter itself must be at least 92.5 to 94% efficient. I was thinking to build the PFC using the UCC28070 and for the DC-DC converter i had...
    on Jun 30, 2010

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