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  • UCC28704: Power supply or IC to design power supply having 2 outputs (reference design IC UCC28704)

    Part Number: UCC28704 Tool/software: Hi Sir, We looking for a power supply or any IC which we can use to design power supply with following specifications : 1. Input Voltage range: 90 - 528VAC OR 100 - 745VDC 2. Output: O/P1: 5V/1Amp O/P2: 5V/0.2Amp 3.…

  • RE: UCC28704: Flyback Converter Troubleshooting - No Output Voltage with UCC28704 and Custom Transformer

    Hi Craig, Good to know that CS pin capacitor was of some help. The spike is ok as long as it is within the blanking interval. If outside this, it might trip OCP condition. The 220pf with the 5k resistor is too huge delay and that is why it is causing…

  • UCC28704: 400Vin buck controller that is FUSA rated/UL documentation.

    Part Number: UCC28704 Tool/software: Hi Team, Do we have a 400Vin buck controller that is FUSA rated and or has UL documentation? Thank you. Kind regards, Wouter Kragt

  • UCC28704: Schematic review for startup fail issue.

    Part Number: UCC28704 Tool/software: Hi, Could you review the schematic for startup fail issue? 2821.Schematic.pdf In the customer's board, tried to turn on and there is startup fail after 50~60ms as below. Thanks.

  • UCC28704: Importing UCC28704 spice model into TINA-TI

    Part Number: UCC28704 Other Parts Discussed in Thread: TINA-TI Hello, I have been trying to import the UCC28704 spice model as a spice macro in TINA-TI. I have been getting the following error while importing. Please provide suggestions. Thanks Rit…

  • UCC28704: Design Review of UCC28704DBVR-1

    Part Number: UCC28704 Tool/software: Hello, Is it possible to get a design for the attached schematic. We will work with GCI regarding the transformer. Thank you, Jon TI Design Review.pdf

  • RE: UCC28704: PSpice Shut down

    Hi Jeremy, Unfortunately, I will not be able to debug on this simulation model now as I mentioned earlier. I think you will need to optimize on the solution settings for optimization. Thank you Regards, Harish

  • UCC28704: Snubber for secondary diodes

    Part Number: UCC28704 Hi, I am using the output of a flyback for gate circuits and a fan. With a very low frequency (600 Hz), the flyback enters CCM. I have Schottky diodes for the secondary diode. Do I need to add snubbers to the Schottky diode?
    • Answered

  • UCC28704: UCC28704

    Resolved
    Part Number: UCC28704 Hello, I have designed this UCC28704 AC/DC flyback converter circuit. I am wondering if the return path of the bridge rectifier is correct?. Also, can you help me find a compliant PN for a transformer to be used with the Converter…
    • Resolved

  • UCC28704: UCC28704 Output Issue

    TI Thinks Resolved
    Part Number: UCC28704 Dears, Customer feedback that when they use UCC28704 flyback power supply,Output Volatge is 15V/1.2A,when the load is light,the output is normal and when the load is heavy,the output is unstable. Pls kindly help to check the schematic…

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