This one says up to 200w  [URL]  
I am looking for a Dell DC/DC Auto-Air Adapter that is compatible with my Inspiron 15 Gaming 5577 .  I do not see my model listed under the 'Compatibility' tab of these products: [URL] Is it possible that my model is similar to a model that is listed?  
Dell DC/DC Auto-Air Adapter for Inspiron 15 Gaming 5577