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.

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