Hello! I make the scheme, what use in DRL. I use two serial string of LED (12 LED in string, 150mA for one LED). Input voltage 12-14 V. I make the schematic, shown below. I get the big problem: if I try programming controller, and then start program (the program run control DIM and slowly increase lighting with PWM), sometimes LM3492 breaking. The IC don't work, use very big current. The resistece between VOUT and GND is 5 Ohm. Only sometimes It's happened. If I remove R19 and R20, I don't get this problem. Why, if programmer connect I get this problem. I lost near 5 IC for this problem.