How set screen to turn off but not to lock phone?

[skuba]

Hi, I have searched and found many threads just about how to not lock the phone, or how to turn off the light. But what I can't find out is if it's possible to set the screen to turn off, let's say, after 2 minutes, but have the phone only lock after, let's say, 10 minutes.
Is that possible natively? with an App?

Thanks so much