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Sean Zhou
27 days ago
Power management
Power management forum
RE: LED driver to drive 8.5V 100mA UVC LED
Hi Sir,
LM3509
would be the best choice for you. BR Sean
Amelie Zheng
6 months ago
Power management
Power management forum
LM3509: SCH review
Resolved
Part Number:
LM3509
Hi Team, My customer now use
LM3509
to drive three LED in their project. May I
Sean Zhou
8 months ago
Power management
Power management forum
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
Menaka Srinivasan
over 1 year ago
Power management
Power management forum
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
Randy Chen
over 2 years ago
Power management
Power management forum
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
Jeremy Ziegler
over 2 years ago
Power management
Power management forum
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
Travis Eichhorn
over 2 years ago
Power management
Power management forum
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...
Christian McMechan
over 3 years ago
Power management
Power management forum
RE: LM3509.exe, Support for Eval Board?
Wow, thanks for the quick reply and delivering.
myo_motor
over 4 years ago
Power management
Power management forum
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...
Masazumi Ishii
over 4 years ago
Power management
Power management forum
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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