The Part Number is LA78040.
The function of this semiconductor is TV and CRT Display Vertical Output IC.
The package is TO-220-7H Type
Preview images :
The LA78040 is a vertical deflection output IC for high image quality TV and CRT displays that supports the use of a bus control system signal-processing IC. The sawtooth waveform from the bus control system signal-processing IC can directly drive the deflection yoke (including the DC component). Color TV vertical deflection system adjustment functions can be controlled over a bus system by connecting the LA78040 to a Sanyo LA768X series or LA769XX series bus control system signal-processing IC. Since the LA78040 provides a maximum deflection current of 1.8Ap-p, it is optimal for small and medium size CRTs.
A Vertical Deflection Output IC, also known as a vertical output stage or vertical deflection amplifier, is an integrated circuit used in electronic devices such as televisions and monitors. It is responsible for driving the vertical deflection yoke, which controls the vertical movement of the electron beam in a cathode ray tube (CRT) or the liquid crystal display (LCD) panel in modern flat-screen displays.
The vertical deflection output IC receives the vertical synchronization signal from the video source and amplifies it to generate the necessary current and voltage levels to drive the vertical deflection yoke. The yoke generates a magnetic field that moves the electron beam in a controlled manner, allowing the display to refresh the image vertically.
• Built-in pump-up circuit for low power dissipation.
• Vertical output circuit.
• Thermal protection circuit.