NXP user manual UM10391, filed among power supply schematics, likely an NXP reference adapter design or evaluation board document. The file name does not say which controller or wattage is covered, so open the PDF to check the actual subject. NXP manuals of this type usually include the full circuit, bill of materials, transformer data and measured performance. That makes them useful for understanding chips found in commercial laptop chargers and for picking correct replacement values. Compare against the real board, since commercial products can deviate.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @schematicslaptop. Enginerys does not host this file.
How to open a .pdf file
The standard format for schematics, block diagrams, power-sequence charts and service manuals.