Other Parts Discussed in Thread: LM3463 I am looking to drive 4 strings of LED at 100ma, ~21V. I need to be able to provide 50% dimming when a room is sensed to be occupied via say an PIR. Assume the input the circuit is a simple logic single and I want…
Hi David,
Yes that is true, we use individual PWM currently. It basically goes from 0% to 100% and then we perform also some tests at 50% and 80%.
When it blinks all the channels blink simultaneously. I also noticed (placing an oscilloscope probe) that…
Part Number: LM3643 Other Parts Discussed in Thread: LM3463 , , TPS92641 Hi Team,
The customer is going to connect the output LED1 and LED2 together, but the surge current of the LED is up to 3A (tp=<800us).
Can LM3463 support 3A surge current? Thank…
Hi Sean,
no is unfortunately not possible. I only found IC LM3463 on your website. If your don't have any futhermore IC Application than i can controll the constant current with discret parts (OPs, Mosfet, ....). Or maybe the Powerful device team can…
Hello Ulrich,
many thanks for your detailed answer and explanation! You made things clear, I did not think about the secondary turns on the transformer.
I still have a second choice which would be maintaining the 50V output but using 1.4A (maximum output…
Part Number: LM3463EVM Other Parts Discussed in Thread: LM3463 Hi everyone,
I was having a look at the documentation related to the evaluation board for the LM3463 (snva642a) when I came accross the formulas and data regarding the LED turn on voltage…
Hi Jose, The main regulated voltage on Vout had set to 50V was base on the test report I got. It voltage setting is from the divide resistors R44, R46, U2A(OPA TL103WAID With internal reference voltage 2.5V), R37 Bias Resistor and U4(Photo-couple). These…
Other Parts Discussed in Thread: UCC29950 , LM3463 Hello team,
I am looking for a solution recommendation for the following specs:
Input Voltage : 85 - 305 VAC Output Voltage : 56 VDC / 120W Careabouts : low cost, space (size similar to or smaller than PMP4334…
Hello,
You could look at using the UCC28810/11 as a buck or a buck/boost to create 40 volts. Then TPS92515 or TPS92518 for buck converters, there are other buck converter parts available as well. There's also the LM3463 that would be a linear solution…
Other Parts Discussed in Thread: LM3463 Hi everyone :)
First post in this forum and its a bit of a long shot...
Main goal is to use a pair LM3463 to drive a larger fixture ( 48" x 10" ) to simulate the daylight by mixing the LED string colors ( Yellow…