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  • UCC28180: UCC28180D AC Under voltage protection(AC Brown out)

    TI Thinks Resolved
    Part Number: UCC28180 Other Parts Discussed in Thread: LM8364 , UCC28019A Hello Dear. I'm using UCC28180D IC for PFC controller. I would like to add the function of AC under voltage protection(Brown out). I found the control IC LM8364 but the operating…
    • Answered

  • RE: UCC28180: About restart time

    Resolved
    Hi Tomoshiro-san, Thank you for the query on UCC28180. During instantaneous stop, the UCC28180 does not have brown in/out functionality implemented with this is and it has to implemented externally. EPGI Discrete brownout function of UCC28180 (1…
    • Answered

  • RE: UCC28600-Q1: Efficient way to design an AC/DC converter with inputs ranging from 100 to 240AC in 50/60Hz, and an output of 48VDC (Isolated)

    Resolved
    Hi Robert, Thank you for the quick reply. For the brown in/out implementation, I would recommend the following circuit using LM8364 from one of the CCM PFC circuits. brownout (1).pdf https://www.ti.com/cn/lit/df/tidrqy2/tidrqy2.pdf?ts=1663301200007…
    • Answered

  • RE: LM5030: How to implement Sequencing ON/OFF control and soft-start function at the same time with SS pin

    Resolved
    Hi Deepak, Thanks for your interest in LM5030. I would take a look at using a undervoltage sensing circuit like LM8364 to drive the SS pin. At the input, you can place a pulldown resistor which would trigger the undervoltage and the LM8364 will pull…
    • Answered

  • UCC28911: The precision of Low voltage, current-limiting protection.

    Resolved
    Part Number: UCC28911 Other Parts Discussed in Thread: LM8364 Dears: Customer will evaluate UCC28911 and have some issue as below: A. The precision of low voltage protection. b. The precision of current-limiting protection. c. The precision…
    • Resolved

  • RE: UC3842: Input undervoltage and overvoltage protection

    Hi Peter, Tks for your suggestion. Now I'm using LM2903 on under-voltage/over-voltage protection circuit, but as the chip's current requirement, the current limiting resistor value is small and more consumption on it. So I would like to try low…

  • Micropower undervoltage sensing

    Answer Suggested
    Other Parts Discussed in Thread: LM8364 , TPS3847 Hi, I'm trying to find a micropower under voltage sensing IC similar to LM8364 but with a wider input voltage. My target is to monitor the voltage of a 2-cell Li-Ion battery, so the Input voltage has…
    • Answered

  • LM8365 N/C Pin

    Resolved
    Other Parts Discussed in Thread: LM8364 , LM8365 Hello, I need to add a delay to a LM8364 circuit, but I can't spin the PCB. I've found the LM8365 and need to know if the N/C pin (Pin #4) is internally connected. My plan is to modify existing boards…
    • Resolved

  • RE: UCC28C44: UCC28C44

    Hi Rajesh, Thanks for your interest in UCC28C44. This device will not turn off until VDD hits its UVLO threshold which is 9V typical. What you can do is use an external circuit connected to the COMP pin to pull COMP low when Vin is less than 62V to…

  • RE: UCC28180: UCC28180 Brown out issue

    Hi John, Sorry, customer hope we don't post sehematic on web and create new post. Currently we test by open loop monitor gate PWM and if became -0.7V is there cause power limit? This external circuit should have some hysteresis added around the LM8364…

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