I'm working with a buck/boost LED driver that uses a 0->10V dimmer input. I would like to use the output of an open-source LED module as a switch for the LED driver. The LED module outputs 0 V in the "off" condition and 6.5 V in the "on" condition. I want to use one of the channels to control a high-power Cree LED using the buck/boost driver. So I would like to boost the 6.5 V output of the LED module to the 10 V required by the LED driver for full brightness. Is an op-amp the best way to do this?
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: