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  • UCC256304: PMP21251 UCC25630X

    TI Thinks Resolved
    Part Number: UCC256304 Other Parts Discussed in Thread: PMP21251 Hi TI guys: could you help to provide the PMP21251 transformer design drawings, thx

  • RE: UCC256404: PFC OFF standby mode

    Hi Marco, The PFC ON/OFF feature is not present in the UCC25640x series. I will get this table updated as that row is incorrect. If you use our UCC28056 along with the UCC25640x you can achieve ultra-low standby power as shown in PMP21251 . This feature…
    • Answered

  • RE: UCC256403: How the latch of TIDA-010081 reference design work ?

    Resolved
    Hi Jimmy, You are correct. This circuit is going to make the controller to restart rather than latch. Please refer the following references for implementing Latch up circuit: PMP21251 Schematic Power Tip 38: Simple latch circuit protects power supplies…
    • Answered

  • [FAQ] PMP21251: How do UCC28056 and UCC256304 help maintain high efficiency across all load operations in low cost, high efficiency, offline AC/DC converters?

    Resolved
    Part Number: PMP21251 Other Parts Discussed in Thread: UCC28056 , UCC256304 How do UCC28056 and UCC256304 help maintain high efficiency across all load operations in low cost, high efficiency, offline AC/DC converters?
    • Resolved
    • Answered

  • UCC256304: New design datasheet/calculator confusion

    Resolved
    Part Number: UCC256304 Other Parts Discussed in Thread: PMP21251 , , UCC28056 , UCC256404 Hi there, I'm working on a new design with the UCC256304 following up the UCC28056 (very similar to the PMP21251 reference design, but with increase power load). I…
    • Resolved

  • RE: TL494: SG3525 , TL494 "Short circuit and Overload protection"

    Hi Henk, You could use a current sense resistor + CS amplifier. PMP21251 is one example of this: http://www.ti.com/lit/df/tidrvj7/tidrvj7.pdf This circuit was used to do latched overcurrent protection in PMP21251. Best Regards, Ben Lough
    • Answered

  • RE: UCC24624: Switching Frequency above 625kHz - what's going to happen?

    Resolved
    Hi Andre, You could place a PNP transistor in between the VDD pin of UCC24624 and its voltage bias. You could then use a circuit such as what is shown in PMP21251 but instead of doing OCP, use it to turn on or off the transistor to enable/disable UCC24624…
    • Answered

  • UCC256304: Inquire UCC28056 + UCC256301/UCC256304 design question

    Resolved
    Part Number: UCC256304 Other Parts Discussed in Thread: UCC28056 , UCC256301 , PMP21251 , UCC256302 Hi Sir, May I have your help for below quesitons? 1. Focus on UCC28056 + UCC256301/UCC256304 2. Could TI solution pass CoC Tier 2 and no load under 100mW…
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    • Answered

  • UCC28056: to use with UCC256304, Inrush current prevent

    Resolved
    Part Number: UCC28056 Other Parts Discussed in Thread: PMP21251 , , Hi all, For PMP21251 , Inrush current prevent circuit is absolutely necessary? UCC28056 is very small ,but no merit because required a lot of space of Q100,Q102,Q103,D108,C113,C116,C117…
    • Resolved

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