Vin min = 12v; Vin max = 28v; Vfd of LED is 3.4V max; Iled = 1A
Can the LM3404 be configured to drive 24 LEDs in a single string or would it be better to parallel two strings of 12 LEDs and make Iled = 2A?
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Jim:
LM3404 is a buck regulator. It can only drive LED strings with voltage lower than the input. To drive 24 LEDs, you need to use a boost converter. My suggestion is TPS92690.
David Zhang