Get PPD file for HP printers

Hi All

I am trying to find .ppd file of a specific printer. Example: I have an HP Photosmart printer. I need to install the printer using terminal. I found that Ipadmin command is used to install printers but .ppd file location is needed. For a new printer (HP Photosmart) .ppd file does not exist in Libary (or in my mac). So is there any way to get that .ppd file?