Overview

The LA7852 is a sync-deflection circuit IC dedicated to CRT display use. It can be connected to the LA7832/7833, 7837/7838 (for vertical output use) to form a sync-deflection circuit that meets every requirement for CRT display use.

特性 Features

? The vertical pull-in range is approximately 10 Hz at fv = 60 Hz.

? The horizontal oscillation frequency can be adjusted stably from 15 kHz to 100 kHz.

? The horizontal display can be shifted right/left.

? The horizontal/vertical sync input can be used intact regardless of the difference in pulse polarity and pulse width.

? The AFC feedback sawtooth wave can be obtained by simply applying a flyback pulse to the IC as a trigger pulse.

? Any duty of the horizontal pulse can be set.

? Good vertical linearity because DC bias at vertical output stage is subjected to sampling control within retrace time.

? Excellent interlace and vertical jitter characteristics on the high-definition display because of independent GND pins for the horizontal block and vertical block.

Built-in Functions

[Horizontal Block]

? AFC

? Horizontal OSC

? X-ray protector

? Horizontal phase shift

? AFC sawtooth wave generator

? Horizontal pulse duty setting

[Vertical Block]

? Vertical OSC

? Vertical sawtooth wave generator

? Sampling type DC voltage control