The Irishman has joined the Clarets on-loan to the end of the season.
"I was away on international duty and got a call to say Burnley wanted to take me on loan so I was delighted to come," said Duffy.
"It's a big club and I'm delighted to be here.
"It's about trying to improve myself, get some experience and obviously try and help the team," he added.
"Looking at the league table and where the team is obviously they are going for promotion. Hopefully I can help and we can go on and get into the play-offs."