TDA8145

TV EAST/WEST CORRECTION CIRCUIT

FOR SQUARE TUBES

October 1998

.

LOW DISSIPATION

.

SQUARE GENERATOR FOR PARABOLIC

CURRENT

SPECIALLY

DESIGNED

FOR

SQUARE C.R.T. CORRECTION

.

EXTERNAL KEYSTONE ADJUSTMENT

(symmetry of the parabola)

.

INPUT FOR DYNAMIC FIELD CORRECTION

(beam current change)

.

STATIC PICTURE WIDTH ADJUSTMENT

.

PULSE-WIDTH MODULATOR

.

FINAL STAGE D-CLASS WITH ENERGY

REDELIVERY

.

PARASITIC PARABOLA SUPPRESSION,

DURING FLYBACK TIME OF THE

VERTICAL SAWTOOTH

DESCRIPTION

The TDA8145 is a monolithic integrated circuit in a

8 pin minidip plastic package designed for use in

the square C.R.T. east-west pin-cushion correction

by driving a diode modulator in TV and monitor

applications.

1

2

3

4

8

7

6

5

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 (top view)

POWERDIP8 (Th = 0.4mm)

(Plastic Package)

ORDER CODE : TDA8145

1/5