Datasheet for the ROHM BD28620MUV-E integrated circuit, 1.65 MB PDF, filed with schematics. The E suffix is part of the ordering code, usually indicating packaging. A manufacturer datasheet gives the pinout, internal block diagram, absolute maximum ratings, electrical characteristics and a typical application circuit. Use it to identify each pin on the board, check supply and enable voltages around the chip, and confirm an exact replacement part number and package before ordering or soldering.
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 @datasheets1. 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.