TEA2031A 查看數據表（PDF） - STMicroelectronics

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TEA2031A

COLOR TV EAST-WEST CORRECTION

STMicroelectronics 

TEA2031A

COLOR TV EAST-WEST CORRECTION

FEATURES SUMMARY

■ BUILD IN FRAME PARABOLA FROM

EXTERNAL SAW-TOOTH

■ PARABOLA CORRECTION ADJUSTMENT

■ KEYSTONE CORRECTION ADJUSTMENT

■ LINE SIZE ADJUSTMENT

■ LINE DYNAMIC CORRECTION POSSIBILITY

(beam current)

■ D CLASS OUTPUT MODULATOR WITH

BUILD IN RECOVERY DIODE

■ 50 OR 60Hz OPERATION

■ LOW DISSIPATION

■ FEW EXTERNAL COMPONENTS

Figure 1. Package

8

1

DIP8

(Plastic Package)

DESCRIPTION

The TEA2031A is intended to ensure frame rate

modulated parabolic and keystone corrections to

the horizontal deflection circuitry of 110° color TV

sets.

The linear frame saw-tooth is applied to appropri-

ate circuitry from which a corresponding parabolic

waveforms is obtained. This waveform is then fed

to a comparator together with the linear line saw-

tooth for comparison. Comparator’s output drives

the output power stage which is capable of sinking

the external coil currents of up to 0.5A.

An internal recovery diode feeds back to the power

supply the coil fly-back current pulses of as high as

0.5A.

April 2004

REV. 2

1/11

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