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  • RE: LED driver to drive 8.5V 100mA UVC LED

    Hi Sir, LM3509 would be the best choice for you. BR Sean

  • LM3509: SCH review

    • Resolved
    Part Number: LM3509 Hi Team, My customer now use LM3509 to drive three LED in their project. May I

  • RE: LM3509: no output on the OVP and SW pins

    Hi Den, There should be a pull up resistor between "Vin" and "SDA", you need to add this resistor and check again. BR Sean

  • LM3509: Maximum LED current

    TI Thinks Resolved
    Part Number: LM3509 Hi, I have planned to use LM3509 LED driver. I would like to connect 4 LEDs in series and get 40mA constant output current. Can you confirm if this is possible and what is the maximum LED current Thanks, Menaka

  • LM3509: Thermal and power dissipation information

    TI Thinks Resolved
    Part Number: LM3509 Hi, Customer is requesting the θJC, ψJT and the power dissipation information for the LM3509. Please help. Best regards, Randy Chen

  • LM3509: LM3509 Parallel Connection of Current Sinks MAIN and SUB/FB

    • Resolved
    Part Number: LM3509 Hi, I am working on a design that uses the LM3509 . An LCD that we

  • RE: lm3509: Proper use for LM 3509?

    I'm not sure I understand the question correctly, but maybe this will help. The LM3509 is designed to have the boost output connect to a common (Anode) for the LED string(s). The cathodes connect to the current sink inputs. The boost regulates the...

  • RE: LM3509.exe, Support for Eval Board?

    Wow, thanks for the quick reply and delivering.

  • LM3509 Excessive Heating

    We have an LM3509 driving two sets of two white LEDs. With L = 4.7 uH and C = 2.2 uF, we had the output voltage at 21.3 V and the LM3509 got hot (over 50 C) Switching to L = 4.7 uH and C = 22 uF, the output voltage went to 7 V so we should be dissipating...

  • LM3509 light load Question

    Hello. There is a Light mode and a frequency changes to LM3509. How many is the current value with which a frequency changes? Is there an arithmetic expression which takes a frequency out of the load electric current? the　load electric current　vs　Sw...

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