Qdeathstar:
i am driving 15 leds in parallel, and i want to drive them at between 10 and 15ma each which would mean about 100-150ma. The table doesn’t go that high. The chip is capable of up to 300ma
I could be wrong, but it seems like you're courting disaster with so many LEDs in parallel. Is their brightness even, or do some appear brighter than others? I would suggest a serial resistor on each LED, like around 75Ω.
Also, I played around with that formula, trying to get the same values as in the table, and I can't get any corroboration!
For instance, if we take the 56µH case, it says the input voltage [I'm assuming that what they mean] is 1.3V:
P[sub]LED[/sub] = I[sub]LED[/sub] * E[sub]LED[/sub] = 2V[sub]IN[/sub]/L [where 'L' is inductance in µH]
So:
PLED = 2 * 1.3 / 56 = 46.4mW
If: PLED = ILED * ELED Then: ILED = PLED / ELED
and assuming an LED voltage of 2V:
ILED = 46.4mW / 2V = 23.2 mA
The table says 50 mA!!
46.4mW / 50mA = 0.93V
So, are they assuming an IR LED?!?
I would just extrapolate from what you know. Run the thing with one LED, and a 220µH inductor and measure the current. Then go from there.