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  • LM3406HV: Making LM3406 Adjustable

    TI Thinks Resolved
    Part Number: LM3406HV Other Parts Discussed in Thread: TPS92515 Due thte unavailabily of the TPS92151 we are trying to cope this situation installing a 5 turn trimmer in parallel to the sensing resistor in order to pick up a portion of voltage and send…

  • LM3406: Can I drive an LED string with a 25V drop from a 28V input with this driver, or do I need a large input voltage?

    Part Number: LM3406 Other Parts Discussed in Thread: LM3409 , , TPS92515 , LM3402 I'm trying to develop an LED application that takes an input of 28V and outputs 25V/360mA. From my initial calculations in the datasheet, I've determined that a switching frequency…
    • Answered

  • LM3406: Duty cycle

    Resolved
    Part Number: LM3406 Other Parts Discussed in Thread: TPS92641 , Hi, Why do the calculations in the LM3406 for buck duty cycle not include the efficiency estimate as they do with the TPS92641? They look like similar switching topologies, so I could use to…
    • Resolved

  • LM3406: Is there a better option to drive a simple 3x3 white LED array?

    Part Number: LM3406 Other Parts Discussed in Thread: TPS92515 , LM3405 , LM3409 Hello, I have a customer looking for a recommendation to drive a simple 3x3 white LED array. I did not find a lot of information on ti.com regarding how to drive basic white…

  • LM3406: Unstable light level

    Part Number: LM3406 Hello team, Could you please help me to address the unstable light level issue with LM3406? Please find the internal link here for the waveforrm. (Please connect to VPN for download) The output current waveform varies into two different…
    • Answered

  • LM3406: Upgraded device

    Resolved
    Part Number: LM3406 Other Parts Discussed in Thread: TPS92512 , LM3409 Hello team, Could you please suggest me upgraded alternative for LM3406MHX/NOPB? Input voltage: >=32V Output current: >=2A PWM dimming is needed and PW signal level is 3.3V. I…
    • Resolved
    • Answered

  • LM3406: Difference in LED current waveform at PWM rise

    Resolved
    Part Number: LM3406 Hi, I would like to ask you a question about the LM3406. When checking the LED waveform while changing the VIN voltage, two types of LED waveforms are generated as shown in the figure below. This is the PWM Dimming waveform. Multiple…
    • Resolved
    • Answered

  • LM3406: Minimum PWM on period

    Resolved
    Part Number: LM3406 Hi, I am creating a circuit using the LM3406 device. I input an external PWM signal and adjust the brightness of the LED, but I would like to ask you about that PWM. I will attach the waveform. Yellow is the waveform of LED current. Green…
    • Resolved
    • Answered

  • LM3406: LM3406HV

    Resolved
    Part Number: LM3406 Dear expert, My customer is using LM3406HV in lighting. Now they found two problems as below, and made some tests. Could you help to check will their solution have other problems? Device parameters: Inductance: 47uH * 2 (series…
    • Resolved
    • Answered

  • LM3406: Shut Off time after VINS low & Length of first on time pulse

    Resolved
    Part Number: LM3406 Other Parts Discussed in Thread: LM3409 , TPS92515 Dear Team, I am using the LM3406 as a LED current source from a 24V PWM voltage. I am using a diode in series with VIN and a connection from the anode to VINS as in the application…
    • Resolved

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