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  • UCC28221 / with current sens resister.

    Other Parts Discussed in Thread: UCC28221 Hi all, Please let us know about UCC28221. We know, this device is current-mode controller. Can we use the resister instead of current-trans? Regards, Nagai
    • Answered

  • UCC28221 / How much the threshold voltage for OCP?

    Resolved
    Hi all, Please let us know about UCC28221 . We know, this device is current-mode controller. Our customer is trying the resistor instead of current-trans with this device. How much the threshold voltage of the CSx-port for OCP? Regards, Nagai
    • Resolved

  • LM5032: Suggest similar Controller with maxium duty cycle greater than 87%

    TI Thinks Resolved
    Part Number: LM5032 Other Parts Discussed in Thread: UCC28220 , UCC28221 Hi, Please suggest an interleaved PWM controller similar to LM5032 with an duty cycle greater than 87% or higher. Regards, Sankar S
    • Answered

  • Re: UCC28220 / UCC28221 Low End Switching Frequency Range

    Resolved
    I have not heard of anyone using these devices for IGBTs. However, that does not meen they are not. However, as you pointed out the switching frequency has been characterized from 45 kHz to roughly 1 MHz. Since the IC designer did not characterize the…
    • Answered

  • Maximun duty of UCC28221.

    Resolved
    Other Parts Discussed in Thread: UCC28221 Hi All, we plan to use UCC28221 but see that "Programmable Maximum Duty Cycle Clamp 60% to 90% Per Channel". for interleave forward, we prefer to use Duty 50%(MAX), Does UCC28221 can operate at 50…
    • Resolved
    • Answered

  • UCC28220: Operating Junction vs Temp Range

    Resolved
    Part Number: UCC28220 Other Parts Discussed in Thread: UCC28221 Hey folks, I have a question regarding the UCC28220 and the UCC28221. The datasheet lists the operating junction temp range from -55C - 150C. However, al the high level summaries indicate…
    • Resolved

  • UCC28220: Soft Start

    Part Number: UCC28220 Other Parts Discussed in Thread: UCC28221 Hi, Our customer is using UCC28220. He finds that there is no Soft-Start function. He applies the power on VDD first and then increasing VIN voltage to 240V. Could you please tell us how…
    • Answered

  • RE: UCC28220: Can UCC28220 be used for non-isolated boost?

    Resolved
    Hi PYTsai, There isn't an excel tool available for UCC28220 but a MathCAD calculator available: www.ti.com/.../ucc28221-calc. Best Regards, Ben Lough

  • RE: I am looking for a multiphase current mode PWM controller. 3-phase is desired:

    You could also consider the UCC28221 dual interleaved PWM controller. It has a 110V internal startup JFET. Regards, John
    • Answered

  • RE: UC2856-Q1 / forward converter

    Resolved
    Hello Yaita-san, We don't have any data on startup current since it's not a specified item in the datasheet. We only have supply current. I couldn't find any reference design with UC2856, however if you let me know what unused pins you are…

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