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  • UCC28711: Current drain from AUX winding

    TI Thinks Resolved
    Part Number: UCC28711 Other Parts Discussed in Thread: TIDA-00173 Hello, In our application, we also need to draw current from the auxiliary winding (approx. 50mA / 15V). But if we load the AUX output, the voltage drops to 10V (with 50mA) immediately…

  • UCC28711: MEASURING SMALL SIGNAL LOOP RESPONSE

    Part Number: UCC28711 Hello: If I added a small 10 Ohm resistor in series with the upper resistor of the divider for the VS pin, will it offer the possibility to measure a small signal loop response by injecting a small signal sweep in a manner similar…

  • UCC28712: UCC28712 replacing UCC28711

    TI Thinks Resolved
    Part Number: UCC28712 Other Parts Discussed in Thread: UCC28710 , , UCC28711 , UCC28780 Hello We have a module use generally use UCC28710 dbr and it works fine. Due to shortage , we bought some UCC28712 thinking it should make no difference because we do…

  • UCC28711: EMI Filter

    TI Thinks Resolved
    Part Number: UCC28711 Other Parts Discussed in Thread: LM5023 , PMP11135 Hi, Good Day. I have a customer who is working with UCC27811. Please see below his query for your reference. Thank you very much. I have designed an SMPS using UCC28711 with WEBENCH…
    • Answered

  • UCC28711: VS pin peak current with wide 70-540 vdc bulk.

    Resolved
    Part Number: UCC28711 I have a 3 phase diode rectifier with 47uf capacitor feeding the UCC28711. The DC bulk voltage nominal range is 70vdc - 540vdc. I have a 950V 9A SJ MOSFET. The output is 24vdc at 1A and the bias is 12v. My transformer turns count…
    • Resolved

  • RE: UCC28711: Flyback converter specification

    Hi Sakthivishnu, Our standard lead time for this device is 35 weeks. That being said our recent capacity improvements have been reducing these significantly and we will continue to see improvements through next year. I hope this answers your question…

  • UCC28711: Challenges in wide input (200Vdc to 800Vdc) flyback transformer using UCC28711.

    TI Thinks Resolved
    Part Number: UCC28711 I am starting wide input (200Vdc to 800Vdc) flyback transformer design using UCC28711. Also like to know the varies challenges like transformer and mosfet losses, care to be taken in cascode structure, and more on the primary side…
    • Answered

  • UCC28711: UCC28711

    Resolved
    Part Number: UCC28711 Other Parts Discussed in Thread: UCC28700 , UCC28730 Hello We have a fast design need using UCC28711 low power, input comes from an Inverter with pur sinewave. Due to low power, half wave rectification is considered suitable. We got…
    • Resolved

  • RE: UCC28711: Low output frequency

    Oleg Kochurov1 said: The question is what exactly prevents UCC28711 from increasing the frequency? The answer is too simple. Datasheet says: " D MAGCC is defined as the secondary diode conduction duty cycle during constant-current, CC, operation. It…

  • UCC28711: UCC28711 in TIDA-00173 Question

    TI Thinks Resolved
    Part Number: UCC28711 Other Parts Discussed in Thread: TIDA-00173 Hi TIer, I have a question about TIDA-00173. Due to 690VAC*1.414=975V 》950V and looks the Q1/Q2 is 950V on BOM, May I know the Voltage stress on Q1 and Q2 is enough for this application?…

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