TDA4950

TV EAST/WEST CORRECTION CIRCUIT

October 1998

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KEYSTONE CORRECTION INPUT

FRAME SAWTOOTH CURRENT INPUT

CURRENT REFERENCE

GND

NON-INVERTING INPUT 100

µA CURRENT SINK

PARABOLA OUTPUT INVERTING INPUT

OUTPUT

+V

S

PIN CONNECTIONS

POWERDIP8 (Th = 0.4mm)

(Plastic Package)

ORDER CODE : TDA4950

.

LOW DISSIPATION

.

SQUARE GENERATOR FOR PARABOLIC

CURRENT

.

EXTERNAL KEYSTONE ADJUSTMENT (sym-

metry of the parabola)

.

INPUT FOR DYNAMIC FIELD CORRECTION

(beam current change)

.

STATIC PICTURE WIDTH ADJUSTMENT

.

PULSE-WIDTH MODULATOR

.

FINAL STAGE D-CLASS WITH ENERGY RE-

DELIVERY

.

PARASITIC

PARABOLA

SUPPRESSION,

DURING FLYBACK TIME OF THE VERTICAL

SAWTOOTH

DESCRIPTION

The TDA4950 is a monolithic integrated circuit in a

8 pin minidip plastic package designed for use in

the east-west pin-cushion correction by driving a

diode modulator in TV and monitor applications.

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