Other Parts Discussed in Thread: LM3405, , TPS92515, TPS92518, LM3409
Hello,
we use in our application 2 LM3405 devices.
Each of the LM3405A drives a Group of 4 LED´s in series.
Both of the LM3405A get the same PWM-Signal at the EN Input.
When the On time of the PWM is very low you see big differences in the brightness
of the two LED Groups.
But we need the same Brightness of both Groups.
We use the application shown in figure 14 of the datasheet.
Can you explain why we have a different brightness of the LED´s
Best regards
Peter Reichart