TEA2031A STMICROELECTRONICS | Alldatasheet
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Technical content
COLOR TV EAST-WEST CORRECTION REV. 2 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
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. Figure 1. Package
Figure 2. Pin Connections Figure 3. Block Diagram and voltage references to the whole IC.
1 AND 2 CAN BE INVERTED
the required current via a series resistor to pin 1. series resistor from an external dc voltage source. produces a keystone effect correction. modulator of the main horizontal scanning circuit. can carry currents of up to 0.5A. Table 1. Absolute Maximum Ratings Table 2. Thermal Data Table 3. ELECTRICAL OPERATING CHARACTERISTICS
Table 4. SYMMETRICAL PARABOLA FOR NO KEYSTONE EFFECT
Table 5. MAXIMUM DISSYMMETRICAL PARABOLA FOR MAXIMUM KEYSTONE EFFECT Table 6. DIFFERENTIAL AMPLIFIER
Figure 6. TYPICAL APPLICATION
Table 7. Order Codes
Table 8. DIP8 - Mechanical Data Figure 7. DIP8 - Package Dimensions
REVISION HISTORY
Table 9. Revision History 20-Apr-2004 2 Stylesheet update. No content change.
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