Hi support :
LM3553 driving Vf 3.3V Red LED is ok.
But I change Vf 3.3V Red LED to a new OSRAM GR PSLR31.13 LED.
The Vf of GR PSLR31.13 is about 6.6V.
When turn on the LED.
There is a high frequency noise.
Maybe the noise come from inductor.
And the light of LED seems to change a lot from the sensor reading.
The schematic is the same as the page 1 of the datasheet.
The only difference is the inductor is 3.3uH.
But the schematic is ok in Vf 3.3V LED.
If I change to Vf 6.6V LED.
Is there anything I need to change in schematic?
best regards
Only
