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TEA2029C
COLOR TV SCANNING AND POWER SUPPLY PROCESSOR
SMPS CONTROL ERROR AMPLIFIER AND PHASE MODULATOR SYNCHRONIZATION WITH HORIZONTAL DEFLECTION SECURITY CIRCUIT AND START UP PROCESSOR OUTPUT PULSES ARE SENT TO THE PRIMARY SMPS IC (TEA2261) THROUGH A LOW COST TRANSFORMER PIN CONNECTIONS
+ INPUT FRAME AMPLIFIER - INPUT FRAME AMPLIFIER FRAME SAW-TOOTH OUTPUT FRAME OUTPUT FRAME RAMP GENERATOR GROUND POWER SWITCH MODE POWER SUPPLY OUTPUT V CC S.M.P.S. INPUT REGULATION HORIZONTAL OUTPUT SUPER SANDCASTLE OUTPUT HORIZONTAL FLY-BACK INPUT HORIZONTAL SAW-TOOTH CURRENT REFERENCE 1 2 3 4 5 6 7 8 9 10 11 12 13 14 28 27 26 25 24 23 22 21 20 19 18 17 16 15
. . . . . . . . . . . . . . .
DEFLECTION CERAMIC 500kHz RESONATOR FREQUENCY REFERENCE NO LINE AND FRAME OSCILLATOR ADJUSTMENT DUAL PLL FOR LINE DEFLECTION HIGH PERFORMANCE SYNCHRONIZATION SUPER SANDCASTLE OUTPUT VIDEO IDENTIFICATION CIRCUIT AUTOMATIC 50/60Hz STANDARD IDENTIFICATION EXCELLENT INTERLACING CONTROL SPECIAL PATENTED FRAME SYNCHRO DEVICE FOR VCR OPERATION FRAME SAW-TOOTH GENERATOR FRAME PHASE MODULATOR FOR THYRISTOR
DESCRIPTION The TEA2029C is a complete (horizontal and vertical) deflection processor with secondary to primary SMPS control for color TV sets.
DIP28 (Plastic Package) ORDER CODE : TEA2029C
SAFETY INPUT VIDEO INPUT HORIZONTAL SYNCHRO CAPACITOR (tip level) VIDEO IDENTIFICATION CAPACITOR MUTING +50/60Hz IDENTIFICATION OUTPUT V.C.R. INPUT PHASE COMPARATOR 1 CAPACITOR GROUND SUBSTRAT A.G.C. KEY PULSE OUTPUT V.C.O. INTPUT V.C.O. OUTPUT
2029C-01.EPS
V.C.O. 90 REFERENCE PHASE COMPARATOR 2 CAPACITOR STARTING AND SAFETY CAPACITOR
August 1993
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2/9
50/60Hz MUTING OUTPUT 503kHz SUBSTRAT GROUND 25 21 20 24 23 19 18 22 VCR SWITCHING INPUT AGC OUTPUT
TEA2029C
BLOCK DIAGRAM
TEA2029C
SUBST
VCR INPUT
1 DET
H. SYNC
26
AGC KEY PULSE
27
VIDEO IDENTIFICATION
HORIZONTAL SYNCHRO AND FRAME SYNCHRO
VCO 500kHZ
17
VIDEO INPUT 2s
HORIZONTAL LOGIC TIMING CONSTANT PULSE WIDTH 26s
1 INHIBITION TIME CONSTANT SWITCHING
2
SAFETY INPUT
16
28 50/60Hz FRAME TIMING IDENTIFICATION LOGIC
V R 1.26V
15
VCC
3.3k
REFERENCE CURRENT VOLTAGE
VR 1.26V
SWITCH ON/OFF SAFETY CIRCUIT SAFETY LOGIC
14
1
2
FRAME ERROR AMPLIFIER 50/60 Hz INHIB. FRAME OUTPUT
FRAME PHASE MODULAT. SOFT STARTING CIRCUIT
H. SAWTOOTH GENERATOR
13
FRAME SAWTOOTH OUTPUT
3
H. INHIBIT S.M.P.S. OUTPUT
S.M.P.S. MODULAT.
H. OUTPUT
SUPER SANDCASTLE
12 VR 1.26V HORIZONTAL FLYBACK INPUT
FRAME SAWTOOTH OUTPUT
4 5 6 7
8 VCC
9
10
11 S SC OUTPUT
POWER GROUND FRAME SAWTOOTH
HORIZONTAL OUTPUT
2029C-02.EPS
TEA2029C
GENERAL DESCRIPTION This integrated circuit uses I L bipolar technology and combines analog signal processing with digital processing. Timing signals are obtained from a voltage-controlled oscillator (VCO) operatingat 500KHz by means of a cheap ceramic resonator. This avoids the frequency adjustment normally required with line and frame oscillators. A chain of dividers and appropriate logic circuitry produce very accurately defined sampling pulses and the necessary timing signals. The principal functions implemented are : - Horizontal scanning processor. - Frame scanning processor. Two applications are possible : - D Class : Power stage using an external thyristor. - B Class : Power stage using an external power amplifier with fly-back generator such as the TDA8170. - Secondary switch mode power regulation. The SMPS output synchronize a primary I.C. (TEA2260/61) at the mains part. This concept allows ACTIVE STANDBY facilities. - Dual phase-locked loop horizontal scanning. - High performance frame and line synchronization with interlacing control. - Video identification circuit. - Super sandcastle. - AGC key pulse output. - Automatic 50-60Hz standard identification. - VCR input for PLL time constant and frame synchro switching. - Frame saw-tooth generator and phase modulator. - Switching mode regulated power supply comprising error amplifier and phase modulator. - Security circuit and start-up processor. - 500kHz VCO The circuit is supplied in a 28 pin DIP case. VCC = 12V. Synchronization Separator Line synchronization separator is clamped to black level of input video signal with synchronization pulse bottom level measurement. The synchronization pulses are divided centrally between the black level and the synchronization pulse bottom level, to improve performance on video signals in noise conditions. Frame Synchronization Frame synchronization is fully integrated (no external capacitor required). The frame timing identification logic permits automatic adaptation to 50 - 60Hz standards or non-in2
terlaced video. An automatic synchronization window width system provides : - fast frame capture (6.7ms wide window), - good noise immunity (0.4ms narrow window). The internal generator starts the discharge of the saw-tooth generator capacitor so that it is not disturbed by line fly back effects. Thanks to the logic control, the beginning of the charge phase does not depend on any disturbing effect of the line fly-back. A 32s timing is automatically applied on standardized transmissions, for perfect interlacing. In VCR mode, the discharge time is controlled by an internal monostable independent of the line frequency and gives a direct frame synchronization. Horizontal Scanning The horizontalscanning frequency is obtainedfrom the 500kHz VCO. The circuit uses two phase-locked loops (PLL) : the first one controls the frequency, the second one controls the relative phase of the synchronization and line fly-back signals. The frequency PLL has two switched time constants to provide : - capture with a short time constant, - good noise immunity after capture with a long time constant. The output pulse has a constant duration of 26s, independent of VCC and any delay in switching off the scanning transistor. Video Identification The horizontal synchronization signal is sampled by a 2s pulse within the synchronization pulse. The signal is integrated by an external capacitor. The identification function provides three different levels : - 0V : no video identification - 6V : 60Hz video identification - 12V : 50Hz video identification This information may be used for timing research in the case of frequency or voltage synthetizer type receivers, and for audio muting. Super Sandcastle with 3 levels : burst, line flyback, frame blanking In the event of vertical scanning failure, the frame blanking level goes high to protect the tube. Frame blanking time (start with reset of Frame divider) is 24 lines. VCR Input This provides for continuous use of the short time constant of the first phase-locked loop (frequency). In VCR mode, the frame synchronization window
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TEA2029C
widens out to a search window and there is no delay of frame fly-back (direct synchronization). Frame Scanning FRAME SAW-TOOTH GENERATOR. The current to charge the capacitor is automatically switched to 60Hz operation to maintain constant amplitude. FRAME PHASE MODULATOR (WITH TWO DIFFERENTIAL INPUTS). The output signal is a pulse at the line frequency, pulse width modulated by the voltage at the differential pre-amplifier input. This signal is used to control a thyristor which provides the scanning current to the yoke. The saw-tooth output is a low impedance, however, and can therefore be used in class B operation with a power amplifier circuit. Switch Mode Power Supply (SMPS) Secondary to Primary Regulation This power supply uses a differential error amplifier with an internal reference voltage of 1.26V and a phase modulator operating at the line frequency. The power transistor is turned off bythe falling edge of the horizontal saw-tooth. The "soft start" device imposes a very small conduction angle on starting up, this angle progressively increases to its nominal regulation value. The maximum conductionangle may be monitored by forcing a voltage on pin 15. This pin may also be used for current limitation. The outputpulse is sent to the primary S.M.P.S. I.C. (TEA2261) via a low cost synchro transformer. Security Circuit and Start Up Processor When the security input (pin 28) is at a voltage exceeding 1.26V the three outputs are simultaneously cut off until this voltage drops below the 1.26V threshold again. In this case the switch mode power supply is restarted by the "soft start" system. If this cycle is repeated three times, the three outputs are cut off definitively. To reset the safety logic circuits, VCC must be zero volt. This circuit eliminates the risk to switch off the TV receiver in the event of a flash affecting the tube. On starting up, the horizontal and vertical scanning functions come into operation at VCC = 6V. The power supply then comes into operation progressively. On shutting down, the three functions are interrupted simultaneously after the first line fly-back.
ABSOLUTE MAXIMUM RATINGS (limiting values) Tamb = 25 C (unless otherwise noted)
Symbol VCC I20 I24 V12 I12 I10 I3 I4 I7 I28 V28 V1/V2 Parameter Supply Voltage (pin 8) Operating Supply Voltage (pin 8) AGC Current (pin 20) Video Identification Current (pin 24) Negative Line Retrace Voltage (pin 12) Line Retrace Current (pin 12) Line Output Current (pin 10) Frame Saw-tooth Generator (pin 3) Frame Output Current (pin 4) SMPS Output Current (pin 7) Safety Input Current (pin 28) Safety Input Voltage (pin 28) Common Mode Range (pins 1-2) Min. Starting threshold Max. 14 13.2 5 10 + 10 40 20 100 40 5 VCC 10 Unit V V mA mA V mA mA mA mA mA mA V
- 20 - 10
- 40
Symbol Rth (j-a)
Parameter Junction-ambient Thermal Resistance
Value 55
Unit C/W
ELECTRICAL OPERATING CHARACTERISTICS Tamb = 25C VCC = 12V (unless otherwise noted) Pulse duration at 50% of the ampl.
Symbol Parameter ICC Supply Current (pin 8, frame, line and SMPS output without load) SYNCH SEPARATOR (Pins 26-27) - I 27 I27 4/9
2029C-03.TBL
Min.
Typ. 50 1.8 - 40 6
Max. Unit 80 mA 3 - 55 9 Vpp A A
Positive Video Input AC Coupled (output impedance of signal source < 200) 0.2 Negative Clamping Current (during synch, pulse) - 25 Clamping Current - Pin for slicing level 0.2V < V27pp < 2V (50% of sync amplitude) 3
2029C-02.TBL
THERMAL DATA
2029C-01.TBL
TEA2029C
ELECTRICAL OPERATING CHARACTERISTICS (continued)
Symbol - I26 I26 I20 V20 tk Positive Current Negative Current Output Current Output Saturation Voltage (I20 = 5 mA) Pulse width (synchro pulse is always inside the key pulse) Frequency control range after line divider (ceramic resonator : 503 kHz) PHASE COMPARATOR 1 (Pin 22) Output Current Low Loop Gain Output Current High Loop Gain Window Pulse Width VCR SWITCHING (Pin 23) I23 V24 Threshold Voltage VCR Operating Input Current (V23 = 0 VCC = 12V) Output Saturation Voltage (without video signal, I24 = 3 mA) Output Voltage (with 60 Hz video signal, I24 = 2.5 mA) Output Voltage (with 50 Hz video signal, I24 = 10 A) Output Current (charging the capacitor) Identification Time (charging the capacitor) Threshold (voltage changing from lower to higher value) Hysteresis Charge Current Base Voltage of Saw-tooth Discharge Current Burst Key Pulse Level Output Voltage (I11 = - 5mA) Line Blanking Pulse Level Output Voltage (I11 = - 5mA) Frame Blanking Pulse Level Output Voltage (and frame out of function) (I11 = - 5mA) Delay between Middle of Synch Pulse (pin 27) and Leading Edge of Burst Key Pulse Duration of Burst Key Pulse Delay between SSC Cutting at Pin 12 and Line Blanking Pulse Threshold for SMPS Safety Threshold for Blanking Threshold for PLL2 Input Current 11V < V12 Input Current 1.3V < V12 < 11V Input Current 0V < V12< 1.3V Input Current - 1V < V12 < 0V Line Blanking Trigger 1.7 - 0.030 2.2 - 0.25 0.2 6.5 11.5 0.75 1.7 4.5 240 200 7 2.7 -1 0.6 0.6 7.5 1 2.2 5 400 215 0.5 V mA V V V mA s V mV A V mA V V V s s s V V V A A A mA A 5/9 0.35 1 7 0.50 1.5 10 0.65 2 13 mA mA s Parameter Min. 0 17 Typ. - 0.75 25 Max. -1 36 5 0.4 8.5 Unit nA A mA V s kHz SYNCH SEPARATOR (Pins 26-27) (continued)
PULSE FOR KEYED AGC (Pin 20) - Positive (function : without video signal : low level, with video signal : key pulses) 0.25 8
6.5 15.30 to 16.10
VCO (Pins 17-18 and 19)
VIDEO IDENTIFICATION (Pin 24) 5 11 0.5 1.3 4 150 185 3.5 9 4 2 2.3 3.7 4
VIDEO IDENTIFICATION (Pin 25) I25 t25 V25 LHYS Ich13 VI13 Idis13 VB11 VL11 VBT11 TB11
H-RAMP GENERATOR (Pin 13)
SUPER SANDCASTLE (Pin 11) 4.5 2.5 5 3 3 5 0.35
TO11
NEGATIVE LINE FLY-BACK INPUT (Pin 12) Vbl12 V12 I12 I12 I12 I12 1.1 11 -1 -3 0 0 11.5 12 - 200 3 - 80 -2 80
-1
2029C-04.TBL
TEA2029C
ELECTRICAL OPERATING CHARACTERISTICS (continued)
Symbol PHASE COMPARATOR 2 (Pin 16) I16 Charging Current Delay between the Edges of 1 and 2 (fVCO = 500kHz) Output Voltage (I10max = 20mA) Output Pulse Duration (when fly-back pulse is with in time T10) (fVCO = 500kHz) 2 Phase Range Free Running Period (with mute signal) Search Window 50Hz Window 60Hz Window VCR Mode Window FRAME SAW-TOOTH GENERATOR (Pins 3-5) I5(60) VS Saw-tooth Amplitude SInternal Current Generator (60Hz on) Discharging Time (with C = 0.47F, V < 4V) Starting Level (0mA < IS < 0mA) Saw-tooth Amplitude (IS = 10mA) Positive and Negative Input Current (V1 - V2) > 25mA for frame blanking safety Output Voltage (0mA < |I4| < 80mA) TON max (fVCO = 500kHz) Output Phase Range SMPS CONTROL INPUT (Pin 9) I9 V7 T7 Input Current (V9 = Vref 14) Output Voltage (0 < I7 < 20mA) tON max (fVCO = 500kHz) Nominal Time (V9 = Vref 14 ) Output Phase Range Threshold Voltage (V28 = Vref 14) Input Current (if V28 > Vref 14 then SMPS, line and frame are switched off during the next line retrace) Charging Current (tC = 4s, T = 64s) Ratio Charging/discharging 10 30 26 0 1.15 2 A V s s s V A SMPS OUTPUT (Pin 7) - No Relation between End of SMPS Pulse (pin 7) and Leading Edge of Line Flyback (pin 12) 32 34 31 tON max 1.26 1.37 3 10 36 0 2 12 50 1 2 3 14 1.26 3 4 16 70 1.4 4 10 VPP A s V VPP A 0.4 1.5 0.6 2 1 26 16 315 247 309 247 247 361 315 276 361 0.8 2.8 1.5 30 19 mA s V s s Line Line Line Line Line Parameter Min. Typ. Max. Unit
LINE OUTPUT (OPEN COLLECTOR) (Pin 10) T10 t 24 15
FRAME LOGIC
FRAME FEEDBACK INPUTS (Pins 1-2) I1,2
FRAME OUPUT (Pin 4) 40 41 tON max V s
SAFETY INPUT (Pin 28) V28
SWITCH-ON, SWITCH-OFF PROCESSING (Pin 15) Ich 15 Ich 15 70 0.8 1 130 1.2 A A
Idis 15
VCC VCC VCC Vref 14 6/9
STARTING SUPPLY VOLTAGE (Pin 8) SMPS*, Frame and Line Starting (pins 7, 10 and 4) SMPS Stopping during Line Retrace Frame and Line Stopping Voltage Reference 5.25 5.25 5.25 1.2 1.26 6.5 6.5 6.5 1.35 V V V V
CURRENT REFERENCE (PIn 14)
2029C-05.TBL
EHT
+140V
500kHz VCR S.S.C 18 V+ +12V VCC 8
VCO
VIDEO IDENTIFICATION OUTPUT
19
23
11
24
HORIZONTAL
10
220V MAINS
TEA2261 I 2L
IN
OUT
27
SYNC. SEPARAT.
DIVIDER + LOGIC
VIDEO
9
SWITCHING REGUL. POWER SUPPLY
V CC2 FRAME MODULAT. 5 3 4 BIAS
TEA2029C
7 28
VERTICAL TDA8172 AMPLIFIER
SAFETY INPUT
FRAME YOKE
APPLICATION WITH TDA8172 FOR B CLASS FRAME POWER AND TEA2261 FOR SECONDARY SMPS REGULATION
VCC2
TEA2029C
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2029C-03.EPS
27
150k
1000F
10k
680 12V
Line Yoke 100nF 220F
1k
VCR SWITCH 1.5k
390
STANDBY MODE SWITCH
1k
22nF
3.3nF
3.32k - 1%
470
10F
10k
15 27
100nF 100nF 4.7nF 47k 220nF
26
25
12 28
11
2.7M
470nF
V CC VIDEO INPUT LINE FLYBACK
8.2k
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EHT TRANSFORMER SMPS OUTPUT VOLTAGE ADJUST
+24V +200V
TEA2029C
SMPS POWER TRANSFORMER
BY218
1000F 2N1711 VCC 1k
22k
BY218 3.3k
BC307
LINE FLYBACK
V CC
470k 1nF 14 Pin 14 (TEA2029) 8 21 +24V 9 22k 16 23 13 22nF
1k
47nF
V CC
Horizontal Phase Adjust
150pF
17 10
220 18 VCC 6
1.8k
1N4001 100F 33k 7 22 2 6 3 13k 1nF 1 3.3k 3 200V 24 5 FRAME SAWTOOTH 150k 680k 470k 1000 F 2.2k 100nF VERTICAL PHASE SHIFT 15k 100 SUPER SANDCASTLE OUTPUT VERTICAL AMPLITUDE ADJUST 1 15nF 10k
COMPLETE APPLICATION WITH B CLASS FRAME POWER
503kHz 19 4 NC
220
3.9k
1.5nF
TEA2029C
1 NC 2
TDA8172
4
5 2.2 220
4.7 F 7
15nF
TO SMPS CONTROL 20
330
100nF
Frame Yoke 32mH, 15 , 0.7App
5.6k
5.6k
15k 1N4148
AGC PULSE
MUTE OUT & 50/60Hz IDENTIFICATION
2029C-04.EPS
TEA2029C
PACKAGE MECHANICAL DATA 28 PINS - PLASTIC DIP
a1
L
I
b1 b b2 e3 e E
D
28
15
F
1
14
Dimensions a1 b b1 b2 D E e e3 F i L
Min.
Millimeters Typ. 0.63 0.45 1.27
Max.
Min.
Inches Typ. 0.025 0.018 0.050
Max.
0.23
0.31 37.4 16.68 2.54 33.02 14.1 4.445 3.3
0.009
0.012 1.470 0.657 0.100 1.300 0.555 0.175 0.130
DIP28.TBL
15.2
0.598
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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PM-DIP28.EPS

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