Specifies the core integrated circuit, a high voltage, high speed power MOSFET and IGBT driver with independent high and low side referenced output channels. The 'S' indicates a SOIC (Small Outline Integrated Circuit) package. 'TR' denotes Tape & Reel packaging. 'PBF' signifies that the part is Lead-Free and RoHS Compliant. Identifies the manufacturer, International Rectifier (now Infineon Technologies).