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  • LM3409HV-Q1: Ripple Voltage and conductive EMI

    Resolved
    Part Number: LM3409HV-Q1 Other Parts Discussed in Thread: LM3409 , PMP15004 , TPS92515 Hello Group, I have been struggling with this for a bit and wanted to get this question out here. I see a lot of information in these forums, so I am eager to see what…
    • Resolved
    • Answered

  • LM3409HV-Q1: The LM3409 Chip generate frequency multiplication audible ringing of PWM input

    Resolved
    Part Number: LM3409HV-Q1 Other Parts Discussed in Thread: LM3409HV , LM3409 Dear Sir: I make my own board of led driver wtih LM3409HV, is very similar to the circuit in AN-1953 LM3409HV Evaluation Board, but different layout. When set PWM duty cycle lower…
    • Resolved
    • Answered

  • LM3409HV-Q1: LED Driver Minimum EN Switching Frequency

    Resolved
    Part Number: LM3409HV-Q1 Other Parts Discussed in Thread: LM3409HV , LM3409 We have an LED Light Bar design using the LM3409HV driver powered by +48Vdc to run a string of 12 Cree XPL LEDs. The PWM switching frequency of the driver is set at 400KHz (Roff…
    • Resolved
    • Answered

  • LM3409HV-Q1: current varies with load

    Resolved
    Part Number: LM3409HV-Q1 Other Parts Discussed in Thread: LM3409 Hi: The product I designed USES the LM3409 chip as the constant current drive source of the relay, which needs to provide about 3.5a constant current of 100mS after power on, and then provide…
    • Resolved

  • LM3409HV-Q1: PWM question in different LED

    TI Thinks Resolved
    Part Number: LM3409HV-Q1 Other Parts Discussed in Thread: LM3409 Hi Sir, We used LM3429HV and found if different number of LED series, the current is different in same dimming ratio as attached file,would you please help to check whether the schematic…

  • TPS92518HV-Q1: Can TPS92518-Q1 use for headlight of DLP scheme

    TI Thinks Resolved
    Part Number: TPS92518HV-Q1 Other Parts Discussed in Thread: TPS92518-Q1 , LM3409-Q1 , LM3409 , TPS92518 Hi Expert My customer want to use TPS92518-Q1 for headlight DLP scheme. but in our reference design that used LM3409-Q1. DLP have the TR2 request as below…

  • LM3409HV-Q1 Battery Voltage Drop(Cranking) Capability

    Other Parts Discussed in Thread: LM3409HV-Q1 , LM3409 , TINA-TI Dear, Sir. My customer is evaluating LM3409HV-Q1 for LED lighting source on HUD application. As you know, Short time battery voltage drop at engine restart after idling-stop(Cranking)must be…
    • Answered

  • LM3409HV: Output current/voltage not matching expected values.

    Resolved
    Part Number: LM3409HV Other Parts Discussed in Thread: LM3409 , Hi all, For some reason, I am getting a different output current and voltage for my LED than I expect based on my calculations. Here are my LM3409 values and component choices: VIN: 24V VO: 1…
    • Resolved

  • LM3409HV-Q1 tDEL & tD-OFF Specification

    Dear, Sir. Sorry again and again. My customer is asking about tDEL and tD-OFF. 1. Could you please clarify min & max (@25deg. C) of both. tDEL min =?, tDEL max =? ｔＤ-OFF min =?, tD-OFF max =? 2. Could you please clarify those values under low temp…

  • LM3409HV-Q1 Parasitic Capcitance on UVLO pin

    Other Parts Discussed in Thread: LM3409 , TINA-TI Dear, Sir. A customer is consodering to put a capacitor onto LVLO pin with resistor network to avoid EMS(Immunity) malfunction. Hence, They would like to know the parasitic capacitance value on UVLO pin…

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