How can I step up 6.5V to 10V?
In comments you said,

I do not need an analog transition. The input will really only be 0 or 6.5V

In that case, the easiest solution is probably a comparator with an open-drain output. Based on the datasheet of your LED driver, no pull-up is required because the the input circuit on the driver sources a small current.
In this schematic, U1 is any comparator with open-drain output that can handle the input and output voltage ranges you need:



simulate this circuit &ndash; Schematic created using CircuitLab