Thanks for posting the reply. So by “full featured” I think he means having an easy way to set and read the max current. Unfortunately they are from Russia and Germany and will take a bit to ship to the US. It would be nice to also find a switching regulator.
Yes TTL just means the logic level. A PWM signal generically is a digital signal that must have a logic level specified and is used to control a driver transistor. Again as I mentioned above, the X-Drive application info is using that TTL input to turn on and off the laser driver at a 5KHz rate with a particular on ratio. This will vary the average output power and give us gray scale burning. The slew-rate capacitor will need to be removed for this to work.