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TEA2031A
COLOR TV EAST-WEST CORRECTION
. . . . . . . . .
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 110o color TV sets. The linear frame saw-tooth is applied to appropriate circuitry from which a corresponding parabolic waveforms is obtained. This waveform is then fed to a comparator together with the linear line sawtooth 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. PIN CONNECTIONS
DIP8 (Plastic Package) ORDER CODE : TEA2031A
MULTIPLIER INPUT 1 1 AND 2 CAN BE INVERTED MULTIPLIER INPUT 2 CURRENT REFERENCE GROUND
1 2 3 4
8 7 6 5
COMPARATOR INPUT 2 MULTIPLIER OUTPUT AND COMPARATOR INPUT 1 V CC POWER SUPPLY OUTPUT
May 1993
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2031A-01.EPS
TEA2031A
BLOCK DIAGRAM
Line SAW-TOOTH
V CC +24V
6.8mH To DIODE MODULATOR
8 100k
7
6
5
50A 120A
V CC
Comparator
K . (I 1 - I 2)
2
Multiplier
V REF i1
1
39k 39k
i2
2
6.3V 3
22k
4
TEA2031A
DC Frame SAW-TOOTH
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 on-chip multiplier circuit and are internally held at 6.3V reference potential level. Current inputs to these pins are drawn from external sources via appropriate resistors. The frame saw-tooth waveform which has a peak-to-peak value of around 3 volts and a mean value of about 2.5 volts, supplies the required current via a series resistor to pin 1. Likewise, the current to pin 2 is drawn through a series resistor from an external dc voltage source. These series resistors can have values of around 40k resulting in input currents of approximately 0.1mA modulation current. Pin 7 should be loaded to ground through a 100k resistor which as a result will produce a parabola
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o
of 5 volts peak-to-peak at pin 7. This parabola is symmetrical if the DC current flowing into pin 2 is equal to the mean input current of pin 1. Otherwise, the parabola becomes dissymmetrical and produces a keystone effect correction. The line saw-tooth at pin 8 is obtained by feeding the line fly-back voltage through an integrator network formed by a diode and a grounded capacitor (see typical application diagram). The DC component of the line saw-tooth is compensated by an internal current sinking source ; so that the mean DC values of line saw-tooth and frame parabola voltages are equal. Line saw-tooth and frame parabola signals are applied to a comparator whose output is in the form of width modulated pulses. During every pulse duration, the output (pin 5) can sink external coil currents of up to 0.5A associated with diode modulator of the main horizontal scanning circuit. An internal recovery diode feeds back the fly-back energy of the coil to the power supply. This diode can carry currents of up to 0.5A.
2031A-02.EPS
TEA2031A
ABSOLUTE MAXIMUM RATINGS
Symbol V6-4 I5-4 I5-6 I1 and I2 Ptot Tstg I5-4 I5-6 Supply Voltage Output Sink Current Diode Output Current Input Current Power Dissipation Storage Temperature Range Non Repetitive Peak Current on Output Transistor Non Repetitive Peak Current on Output Diode Parameter Value 35 0.5 0.5 - 0.5 0.8 - 20 to 150 1.5 1.5 Unit V A A mA W A A
2031A-01.TBL
C
Symbol RTH (j-a)
Parameter Junction-ambient Thermal Resistance
Value 80
Unit C/W
ELECTRICAL OPERATING CHARACTERISTICS
Symbol V6-4 I6 V3-4 I1 mean I1pp I2 I2 V7H V7H Parameter Supply Voltage Supply Current (R(3-4) = 22k ; IOUT = 0) No Load Consumption (R(3-4) = 22k ; IOUT = 0 ; V(6-4) = 24V) Voltage Reference (R(3-4) = 22k) Frame Saw-tooth Input DC Mean Current R1 = 39k at 2.5V Mean - saw-tooth Voltage Frame Saw-tooth Input Peak-to-peak Current R1 = 39k at 2.5V Mean - saw-tooth Voltage Keystone Correction Input DC Current If I1 Mean = I2 : No Keystone Effect. R2 = 39k at 2.5V DC ref. Keystone Correction Input DC Current for Maximum Keystone Effect Top Parabola Voltage (2V < V1 = V2 < 3V) Top parabola temperature drift Min. 16 Typ. 24 4 100 6.3 0.1 70 0.1 12.5 10 15 0.5 5.2 6 1 1.2 Max. 35 6 150 6.7 Unit V mA mW V mA A mA A V mV/C V mV/C
5.9
SYMMETRICAL PARABOLA FOR NO KEYSTONE EFFECT (see Figure 2) Parabola Amplitude (V2 = 2.5V ; V1 mean = 2.5V, V1pp = 3V) V7H - V7L (V7H - V7L) Parabola amplitude drift versus temperature V7H - V7L1 Symmetry V7H - V7L2 V7H - V7B V7H - V7B V7H - V7A Parabola Amplitude (V2 = 2V or V2 = 3V ; V1 mean = 2.5V ; V1pp = 3V) Parabola Amplitude Ratio 3.5
0.8
1
MAXIMUM DISSYMMETRICAL PARABOLA FOR MAXIMUM KEYSTONE EFFECT (see Figure 3) 5.3 2.6 8.5 9.2 4.1 V
DIFFERENTIAL AMPLIFIER I8 = F() Input 8 Sink Current Source Input 8 Current Drift Versus Temperature Transfer Characteristics (pins 7-8) (F = 1MHz) Input Noise (pins 7-8) Rise and Fall Time (louput = 250mA) Output Saturation Voltage to Ground (I5 = 0.5 A) Output Saturation Voltage to VCC (I5 = 0.1A) Output Diode Direct Voltage (I5 = + 0.5A) 0.04 5 1 1.2 2 1.2 0.06 0.1 500 50 mA %/C mA/mV V A/s V V V 3/6
2031A-03.TBL
V5-4 V6-5 V5-6
2031A-02.TBL
THERMAL DATA (Tamb = + 50C)
TEA2031A
PARABOLA OUTPUT
FIGURE 1 4V 3V 2.5V 2V 1V t 0 FIGURE 2 V7H V2 = V1 MEAN = 2.5V V7L V7L1 V7L2 t 0 FIGURE 3 V7H V7A V2 = 3V V2 V7B 10ms V2 = 2V t V1 MEAN
2031A-03.EPS 2031A-04.EPS
V1
10ms V7
20ms
10ms V7
PARABOLA TEST DIAGRAM
V CC 24V 100k V7 8 7 6 5
TEA2031A
1
2
3
4
39k
39k
22k
V1
V2
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TEA2031A
TYPICAL APPLICATION
LINE FLY-BACK 200V
22nF E-W CORRECTION EFFICIENCY (FEED-BACK) 6.3mH VCC 1.8nF 8 7 6 24V 5 To DIODE MODULATOR
22k
100k
33k
1M
1N4148 LINE SIZE ADJUSTMENT 4.7k
TEA2031A
1
2
3
4
+3.8V +2.5V +1.2V 0V TYPICAL FRAME SAW-TOOTH
39k
39k
22k I 3 REFERENCE
2V
3V
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2031A-05.EPS
KEYSTONE ADJUSTMENT
TEA2031A
PACKAGE MECHANICAL DATA 8 PINS - PLASTIC DIP
e4
A a1
I
b1
b Z
B B1 e e3 D Z
L
E
8
5
F
1
4
Dimensions A a1 B b b1 D E e e3 e4 F i L Z
Min. 0.51 1.15 0.356 0.204 7.95
Millimeters Typ. 3.32
Max.
Min. 0.020 0.045 0.014 0.008 0.313
Inches Typ. 0.131
Max.
1.65 0.55 0.304 10.92 9.75 2.54 7.62 7.62 6.6 5.08 3.81 1.52
0.065 0.022 0.012 0.430 0.384 0.100 0.300 0.300 0260 0.200 0.150 0.060
3.18
0.125
Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No licence is granted by implication or otherwise under any patent or patent rights of SGS-THOMSON Microelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. SGS-THOMSON Microelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of SGS-THOMSON Microelectronics. (c) 1994 SGS-THOMSON Microelectronics - All Rights Reserved Purchase of I2C Components of SGS-THOMSON Microelectronics, conveys a license under the Philips I2C Patent. Rights to use these components in a I2C system, is granted provided that the system conforms to the I2C Standard Specifications as defined by Philips. SGS-THOMSON Microelectronics GROUP OF COMPANIES Australia - Brazil - China - France - Germany - Hong Kong - Italy - Japan - Korea - Malaysia - Malta - Morocco The Netherlands - Singapore - Spain - Sweden - Switzerland - Taiwan - Thailand - United Kingdom - U.S.A.
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DIP8.TBL
PM-DIP8.EPS

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