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Showing 31 results View by: Thread Post Sort by
    Answered

  • UC1845A: Selection of gate driving resistence to be connected at the output of UC1845A.

    Resolved
    Part Number: UC1845A Tool/software: I am using UCI1845A as the flyback controller and the output of the IC is connected to the gate of Flyback main MOSFET through 2.5ohm. The Vcc pin is connected to 13v source hense the peak output current will be 13…
    • Resolved
    • Answered

  • UC1845A-SP: Error Amplifier

    Resolved
    Part Number: UC1845A-SP Other Parts Discussed in Thread: UC1845A Tool/software: Hi Folks Is the Error Amplifier biased to 5V like shown in Figure 17 or is it 2.5V shown in the functional block diagram? Best Regards Rolf
    • Resolved
    • Answered

  • UC1845A-SP: Sink/Source Current OUT pin

    Resolved
    Part Number: UC1845A-SP Other Parts Discussed in Thread: TIDA-070002 Tool/software: Dear Support What is the maximal peak current at the OUT pin? Specified is 200[mA] RMS but Figure 1. goes up to 500 [mA]. I saw several designs (e.g. TIDA-070002) where…
    • Resolved
    • Answered

  • UC1845A-EP: Requesting Thermal Resistance, Junction to Board and/or Junction to Case (bottom)

    Resolved
    Part Number: UC1845A-EP Tool/software: Hi, The datasheet for UC1845A-EP ( UC1845AMDREP) 8 pin-SOIC only lists thermal resistance, junction to ambient. Are there values for thermal resistance, Junction to Board and/or Junction to Case (bottom)?
    • Resolved

  • UC1845A-SP: Design Guide / Simulation

    Part Number: UC1845A-SP Tool/software: Dear Support Do you provide a spreadsheed calculator for the UC1845A-SP? Or is it possible to simulate with WEBECH? Best regards Rolf
    • Answered

  • UC1845A-EP: Junction to Case Thermal Resistance

    Resolved
    Part Number: UC1845A-EP Hi Experts, Our customer would like to request information on the junction-to-case thermal resistance of UC1845AMDREP. Please provide if available. Thank you and best regards, Gerald
    • Resolved
    • Answered

  • UC1845A-SP: LCCC (FK) 20 Package Drawings Missing!

    Resolved
    Part Number: UC1845A-SP Hi, Please provide detailed package drawing for the LCCC-20 quickly, and as a .pdf (not autocad). Part # 5962-8670408VXA (uc1845alqmlv), LDC 1915A. The datasheet for the UC1845A-SP does NOT have the LCCC-20 (FK) package drawing…
    • Resolved

  • UC1845A-SP: Need for additional data not provided in datasheet: oscillator, COMP, Err Amp Input voltage

    Part Number: UC1845A-SP I have several questions below relating to setting tspec limits for the free-run oscillator frequency, the COMP offset diodes, and the Err Amp Input Voltage. 1) The oscillator: I have some DVT data from qty 3 UC1845A-SP that shows…
    • Answered

  • UC1845A-SP: Bipolar technology or, on the contrary, BiCMOS

    Resolved
    Part Number: UC1845A-SP Hi Experts, Our customer would like to know if component 5962P8670411VYC uses a purely bipolar technology or, on the contrary, BiCMOS In the second case, customer would like to know if we have any SEE reports that could share on…
    • Resolved
    • Answered

  • UC1845A-SP: Setting switching frequency in order not to degrade minimum duty cycle

    Resolved
    Part Number: UC1845A-SP Hi, I'm trying to set switching frequency of my flyback converter using UC1845A-SP. I need to allo %48 duty cycle and I need fsw=300kHz. I know that Ct capacitance value effects minimum duty cycle and Rt resistance should be…
    • Resolved
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