Part Number: LM3509 hi,
I'm designing a board with LM3509 and would like to connect 2x2 led in main pin to drive with 40mA current output. Can you please let me know, whether this configuration is supported by the chip. Attached image for your refere…
Part Number: LM3509 Hi Team,
My customer now use LM3509 to drive three LED in their project. May I ask whether the SCH is ok?
LED IF= 30mA, in this application, they limit the current to 20mA by RESET.
Part Number: LM3509
Hello,
a few days ago I've received my new PCB with LM3509 on it which supposed to drive 6 white LEDs (3 x 2). After assembly and tests all component on the PCB work apart from the aforementioned LM3509. I've been trying to debug…
Part Number: LM3509 Other Parts Discussed in Thread: TPS61169 , TPS61165 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…
Part Number: LM3509 Hi, I am working on a design that uses the LM3509. An LCD that we are integrating has four anode connections and one cathode connection. In order to realize a higher current capability, can the MAIN and SUB/FB pins both be connected…
Part Number: LM3509 Hi,
Customer is requesting the θJC, ψJT and the power dissipation information for the LM3509. Please help.
Best regards,
Randy Chen
Part Number: LM3509 I'm looking for a way to control the brightness of LEDs of various colors. (PWM is not an option due to possible sensor sensitivity to strobing).
I'd like to use the LM3509 as a current source to the anodes of a number of different…
Part Number: LM3508 Other Parts Discussed in Thread: LM3509 Dear support member,
My customer used LM3508.
I have question about calculation formula.
LM3508 datasheet 14 page formula 9 include Inductor.
LM3508 same series LM3509 datasheet 22 page formula…
Other Parts Discussed in Thread: LM3509 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…
