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  • LM3409HV-Q1 Input Offset on High Side Sense Comparator

    Other Parts Discussed in Thread: LM3409HV , TINA-TI Dear, Sir. I am still waiting for your advice. Below is my personal assumption after checking all datasheet contents. Can you accept that,? Otherwise, Please corrent if there were any miss-understandings…
    • Answered

  • LM3409HV: LM3409HV IC heated and LED flickering issue.

    Resolved
    Part Number: LM3409HV Other Parts Discussed in Thread: LM3409 Hello, Make LED lighting circuit as attached. Using 4pcs of LM3409HV to drive 4color(RGBW) LED (Osram LE RTDUW S2W) and 4 LEDs are connected in series. During ON test LM3409HV and FET(IRF5210…
    • Resolved
    • Answered

  • LM3409HV: 3kHz noise

    Resolved
    Part Number: LM3409HV Other Parts Discussed in Thread: LM3409 Hello Were using the LM3409HV with a shunt FET. Our circuit is very similar to the circuit in AN-1953 LM3409HV Evaluation Board (see below). Five of these drives a bank of LEDs. The problem…
    • Resolved

  • RE: LM3429-Q1 design for Buck application

    Brian - From your description you are correct, a buck solution is more suitable. I would suggest trying LM3409HV-Q1 instead as it is dedicated for the buck topology. John
    • Answered

  • LM3409HV / setting the operation point

    Resolved
    Other Parts Discussed in Thread: LM3409HV , LM3409 , TPS92661-Q1 Hello, Please let me know about LM3409HV and TPS92661. (1) Roff and Coff setting Could you please let me know the setting method of Coff, Roff for wide Vout range ? Should we calculate the Coff and…
    • Resolved

  • RE: LM3409HVEVAL: External Dimming with 2 Diodes

    Hi Clinton, Unfortunately, I am damaging another board on Friday. Those redline are the modification that I made. I remove the R1 so that I could use my own pwm driver. Also, I set the J1 into mode 1 which EN pins is shorted to Vin. Here is the specification…

  • RE: LM3409 start up malfunction

    Hello, Firstly thanks for answer. Ordering codes of all components was written as comments in .pdf file attached in mail. Here are ordering codes: -> LM3409HV -> C1 and C5: 1206 4u7 50V, Taiyo Yuden: UMK316AB7475KL-T -> Q1: Diodes: DMP6050SS…

  • RE: LM3409HV-Q1_Advice for Total System Delay Calculation

    Dear, David-san. Thank you for your valuable advice. The IC internal delay are defined by tDEL & tD-OFF. Regarding PMOS delay(turn-on & turn-off), no enough explanation how to calculate those precise as well(referring Qgs, Qgd, etc). Could you…
    • Answered

  • LM3409 - Coff range

    Resolved
    Hello, Could you please let me know the min/max range of Coff? In the datasheet P.33 , there is the discription that "Assume a Coff value (from 470pF to 1nF)" Can we use our of this 470pF to 1nF range ? (for example, 330pF or 1.5nF) Best Regards…
    • Resolved

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