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  • UCC28701: Abnormal behaviour on NTC pin in UCC28701

    Part Number: UCC28701 Hi, we're haveing some troubles related to pin NTC of the device (pin n°1). Connected to this pin there are a 4K7 fixed resistor in series with a 100K NTC (pn: ERT-J1VV104H) down to GND. When the ambient temperature detected…
    • Answered

  • UCC28701: UCC28701 LTspice Simulation Error "Too few nodes"

    Resolved
    Part Number: UCC28701 Hello, I am designing a flyback using the UCC28701 and want to do a simulation in LTspice. I downloaded the PSpice model fro TI website and imported it into the LTspice XVII. (opened the .lib file in the LTspice and create…
    • Resolved
    • Answered

  • UCC28701: What determines the UCC28701 Operating Frequency?

    Resolved
    Part Number: UCC28701 Other Parts Discussed in Thread: TINA-TI Hello, I am using UCC28701 to design a flyback converter. And I am a little confused by the system operating frequency. I see the following figure from the datasheet. Is VCL the same as…
    • Resolved

  • UCC28701: two switch flyback in DCM topology calculations.

    Part Number: UCC28701 Hello Harish: Happy New Year! Would you help me find out which spreadsheet based document you would use to get calculations for two switch DCM flyback? I will post it in the Forum as well. See below what I had used…

  • UCC28701: APPLICATION FOR 600V TO 1000V BIAS

    Part Number: UCC28701 Other Parts Discussed in Thread: UCC28730 , UCC28700 Hello: We need to get an isolated converter for typ 15W output typ 22V dc , Input maybe 600v to 1000 v, typ 800v We can use 1200V devices . What controller can we use with…

  • UCC28701: WEBENCH POWER DESIGNER Result does not match with TINA-TI simulation.

    TI Thinks Resolved
    Part Number: UCC28701 Other Parts Discussed in Thread: TINA-TI Hello, I am using UCC28701 to design a 20V/2A output flyback with a switch frequency around 100kHz. I downloaded its TINA-TI model from website and used the WEBENCH Designer shown below…
    • Answered

  • UCC28701: Transformer specification

    Resolved
    Part Number: UCC28701 Hi Team, The Webench design of UCC28701DBVR provides the details of the transformer winding. Under the auxiliary winding, it states the strands 2.0. Our customer would like to know what does strands 2.0 mean. Are they two 28 AWG…
    • Resolved

  • RE: UCC28701: UCC28701

    Hello, The PSPICE model will not run in Tina TI. There are two other models that were developed for Tina TI that you can use. The following links will bring you to these models. As far as spice models go. I am not sure which one I would recommend…

  • UCC28701: output over-voltage function

    TI Thinks Resolved
    Part Number: UCC28701 Please let us know about over-voltage function. What is the time from overvoltage detection to device stops switching? Regards, Kura

  • RE: UCC28701: UCC28701

    Eric Relief! Thnx for confirming that 5v3 amp can be controlled by UCC28701 Your detailed review is highly appreciated. One thing I noticed- maybe wrong- the max peak current in the output diode is 14 amps. This I thought would cause problems in…

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