This part is a kind of semiconductor called STV9378.
Function of this product has VERTICAL DEFLECTION BOOSTER.
Manufacturers : STMicroelectronics
Image and pinout :
Some of the text within the PDF file :
STV9378 VERTICAL DEFLECTION BOOSTER . . . . . . ADVANCE DATA POWER AMPLIFIER FLYBACK GENERATOR THERMAL PROTECTION OUTPUT CURRENT UP TO 2.0APP FLYBACK VOLTAGE UP TO 90V (on Pin 5) INTERNAL REFERENCE VOLTAGE HEPTAWATT (Plastic Package) DESCRIPTION Designed for monitors and high performance TVs, the STV9378 vertical deflection booster delivers flyback voltages up to 90V. The STV9378 operateswith supplies up to 42V and provides up to 2App output current to drive the yoke. The STV9378 is offered in HEPTAWATT package. PIN CONNECTIONS ORDER CODE : STV9378 7 6 5 4 3 2 1 Non-inverting Input and Reference Voltage Output Stage Supply Output GND Flyback Generator Supply Voltage Inverting Input Tab connected to pin 4 9378-01.EPS July 1994 This is advance information on a new product now in de [ ... ]