So my company is working on a product requiring high power LEDs and selected the LM3492 as the best option. Our application is for two strands of two 6V LEDs and 100mA through each strand. After following the guide to part selection, a board was made and ordered, and did not work. On first power up, lights remained off and the IC quickly began heating up. Second attempt (with same board) gave a brief flash to one strand before shutting down. As no one here has experience with this chip, we ordered the evaluation board to observe how a working circuit behaves. From the data sheet, it appears that the eval circuit should work with our LED strands so we used them instead of 10 LED strands as described in the sheet. During the setup procedure for the eval board (Step 4, connecting DIM1 + DIM2 to >2V) suddenly only strand 2 powered up drawing over 500mA even though the circuit has a 150mA limit. What makes it weirder is that grounding the enable pin gives the same result; no shutdown. I am at a loss as to what is going on here, anyone have suggestions on what to try to get this thing operational?
Thanks,
