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TEA2031A

ST Microelectronics
Part Number TEA2031A
Manufacturer ST Microelectronics
Description COLOR TV EAST-WEST CORRECTION
Published Apr 16, 2005
Detailed Description TEA2031A COLOR TV EAST-WEST CORRECTION FEATURES SUMMARY ■ BUILD IN FRAME PARABOLA FROM EXTERNAL SAW-TOOTH Figure 1. P...
Datasheet PDF File TEA2031A PDF File

TEA2031A
TEA2031A

Overview
TEA2031A COLOR TV EAST-WEST CORRECTION FEATURES SUMMARY ■ BUILD IN FRAME PARABOLA FROM EXTERNAL SAW-TOOTH Figure 1.
Package ■ PARABOLA CORRECTION ADJUSTMENT ■ KEYSTONE CORRECTION ADJUSTMENT ■ LINE SIZE ADJUSTMENT ■ LINE DYNAMIC CORRECTION POSSIBILITY (beam current) )■ D CLASS OUTPUT MODULATOR WITH t(sBUILD IN RECOVERY DIODE c■ 50 OR 60Hz OPERATION du■ LOW DISSIPATION ro■ FEW EXTERNAL COMPONENTS lete PDESCRIPTION oThe TEA2031A is intended to ensure frame rate smodulated parabolic and keystone corrections to bthe horizontal deflection circuitry of 110° color TV Osets.
-The linear frame saw-tooth is applied to appropri)ate circuitry from which a corresponding parabolic t(swaveforms is obtained.
This waveform is then fed cto a comparator together with the linear line sawutooth for comparison.
Comparator’s output drives dthe output power stage which is capable of sinking rothe external coil currents of up to 0.
5A.
PAn internal recovery diode feeds back to the power supply the coil fly-back current pulses of as high as Obsolete0.
5A.
8 1 DIP8 (Plastic Package) April 2004 REV.
2 1/11 TEA2031A Figure 2.
Pin Connections MULTIPLIER INPUT 1 1 AND 2 CAN BE INVERTED MULTIPLIER INPUT 2 CURRENT REFERENCE GROUND 1 2 3 4 8 COMPARATOR INPUT 2 7 MULTIPLIER OUTPUT AND COMPARATOR INPUT 1 6 VCC POWER SUPPLY 5 OUTPUT Figure 3.
Block Diagram Line SAW-TOOTH t(s)VCC +24V uc8 7 6 d100Ω lete Pro50µA VCC Comparator 120µA bsoK .
(I1 - I2) 2 6.
8mH 5 To DIODE MODULATOR ) - OMultiplier duct(si1 ro 1 VREF i2 2 6.
3V 3 4 TEA2031A 39KΩ 39KΩ 22KΩ olete PFrame Obs SAW-TOOTH DC GENERAL DESCRIPTION The TEA2031A is intended to provide to 110° color TV sets a parabolic and keystone frame rate modulated correction in addition to the main horizontal scanning.
A stable 6.
3V internal reference provides current and voltage references to the whole IC.
Pins 1 and 2 are two symmetrical inputs of an onchip multiplier circuit and are internally held at 6.
3V reference potential le...


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