Good Evening,
I am designing a new high/low beam motorcycle head lamp using LM3409. The driver board will need to light up 2 pcs of 3 Amp Leds for low beam and the same drive circuit has to light up 2pcs of 1.5 Amp LEDS for high beam independently.. From your experience which is the best solution to make this work? The sense resistor will be 0.08Ohm and when the high beam is on I want to apply at the Iadj pin a voltage of around 0.6V to modify the threshold. Is this a good idea? Do you have an adj ref voltage regulator for this low voltage? Also regarding the input EMI filter. Do you have any application note on designing Input Filters for automotive buck led driver circuits?
Thank you