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  • UC1843-SP: Comparison Space grade PWM Controllers

    TI Thinks Resolved
    Part Number: UC1843-SP Other Parts Discussed in Thread: UC1845 , UC1843 , , UC1845-SP Hi Sir, I wanted to use space grade PWM controller for forward converter with current mode control. There are many space grade ICs available like: UC1843, UC1845 what are…

  • UC1843-HIREL: 5962-8680601EA & 5962-8773901XA Class type request.

    TI Thinks Resolved
    Part Number: UC1843-HIREL Good Afternoo, Please help us understand what the class type for both the 5962-8773901XA and 5962-8680601EA is? The DLA drawing allows for either device Class M or Q and without the third digit in the suffix present, I cannot…

  • UC1843-SP: the potential of Lid about UC1843-SP

    TI Thinks Resolved
    Part Number: UC1843-SP I would like you to reply about following question. Is the potential of Lid about UC1843-SP Open? or Grand ? Or else?

  • UC1843A-DIE: looking for answers on the die name

    TI Thinks Resolved
    Part Number: UC1843A-DIE The chip used for UC1843MKGD1 is named SMGN A C1843PS. The chip used for UC1843TD1/2 and UC1843-W is named SMGNC1843PS. What is the difference of the chips? are they tested and released as the same ?
    • Answered

  • UC1843: UVLO ambiguity in datasheet.

    Resolved
    Part Number: UC1843 Datasheet [SLUS223E –APRIL 1997–REVISED JANUARY 2017] quotes UVLO values listed against the various part numbers, but I cannot tell which row corresponds to the UC1843. The row titles are ; Row-1 = UCx842/4 UC184x and UC284x…
    • Resolved
    • Answered

  • UC1843: Output frequency at 625KHz

    Resolved
    Part Number: UC1843 Hello and thanks in advance, I paste an image of a simple version of my schematic (the whole circuit is too complicated to be posted here). Due to a mishandling the resistor Rx burned and increased its value to an almost open circuit…
    • Resolved

  • UC1843: High Voltage Non-Isolated DCM Flyback Design

    TI Thinks Resolved
    Part Number: UC1843 Other Parts Discussed in Thread: LM3481 , , , UCC28C43 I'm working on a high voltage DC-DC flyback converter in DCM (28 VDC in/2800 VDC out) and I'm interested in using the UC1843 controller. Are there any examples or application notes…
    • Answered

  • UC1843B-SP: External error amplifier to override internal error amplifier

    Resolved
    Part Number: UC1843B-SP Other Parts Discussed in Thread: UC1843-SP I am using the UC1843-SP in an application where the error amplifier reference needs to be variable, so I am wondering what is the best way to override the internal error amplifier but…
    • Resolved
    • Answered

  • UC1843: Soft start Calc.

    Resolved
    Part Number: UC1843 How do I calculate the soft start timing? I followed the soft-start circuitry on figure 22 and is seeing some delay but I want know how to correctly calculate it. www.ti.com/.../detailed-description
    • Resolved

  • UC1843: output does not switch

    Part Number: UC1843 Other Parts Discussed in Thread: UCC28C43 , , Hi everybody, I'd like to design a rad-hard non-isolated DC-DC boost converter using the TI UC1843 PWM controller to increase the voltage of a solar panel. I've performed some simulations…

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