Hi Team,
Nice to talk with you. We meets a problem on LM3409.
The LM3409 is used in a 12V power supply, and it is found that the consistency is not good when it is turned on, the lights are on at different times. and the voltage waveform across the LED is as below:
The quicker one's start time is about 3.94s, and the slower one's start time is about 7.44s.
We exchange the LM3409 IC in two boards, as a result, the one that starts fast slows down, and the one that starts slow gets faster. It means this is an IC problem, right?
So could you help us review on this and give some comments here?
Best regards,
Sherman