TEA2128 COLOR TV SCANNING AND POWER SUPPLY PROCESSOR ADVANCE DATA . .. . .. . . .. . . . .. DEFLECTION AUTOMATIC VCR MODE RECOGNITION FOR TIME CONSTANT SWITCHING VIDEO IDENTIFICATION CIRCUIT DEFLECTION 500kHz RESONATOR OSCILLATOR NO LINE AND FRAME OSCILLATOR ADJUSTMENT DUAL PLL FOR LINE DEFLECTION SUPER SANDCASTLE OUTPUT INTERNAL SYNCHRO INHIBITION FOR OSD MODE AUTOMATIC 50Hz/60Hz STANDARD IDENTIFICATION EXCELLENT INTERLACING CONTROL FRAME SAFETY INPUT FRAME SAWTOOTH GENERATOR SHRINK24 (Plastic Package) S.M.P.S. CONTROL ERROR AMPLIFIER AND PHASE MODULATOR SYNCHRONIZATION WITH HORIZONTAL DEFLECTION START UP PROCESSOR MASTER/SLAVE CONCEPT FACILITIES ORDER CODE : TEA2128 DESCRIPTION The TEA2128 is a complete (horizontal and vertical) deflection processor with secondary to primary S.M.P.S. control for color TV sets. FRAME SAW-TOOTH 1 24 FRAME SAW-TOOTH OUTPUT VCO INPUT 2 23 φ2 FILTER 50% CAPACITOR 3 22 LINE FLYBACK INPUT VIDEO INPUT 4 21 SUPERSANDCASTLE OUTPUT NOISE MEASUREMENT OUTPUT 5 20 LINE OUTPUT VCC /2 REFERENCE 6 19 LINE MONOSTABLE CAPACITOR VCR DETECTOR OUTPUT 7 18 CURRENT REFERENCE φ1 FILTER 8 17 LINE SAW-TOOTH SOFT START CAPACITOR 9 16 IDENTIFICATION OUTPUT S.M.P.S. FEED-BACK 10 15 S.M.P.S. OUTPUT 11 14 FRAME SAFETY INPUT VIDEO INDENTIFICATION CAPACITOR & OSD CONTROL GROUND 12 13 2128-01.EPS PIN CONNECTIONS VCC December 1992 This is advance information on a new product now in development or undergoing evaluation. Details are subject to change without no tice. 1/8 2/8 2128-02.EPS VCC 2.7kΩ Video 100kΩ 470kΩ 220nF 3.9kΩ 33nF 2.2µF 4.7nF 10µF 4.7nF 220nF 9 8 7 2µ s NOISE MEASUREMENT inhibition 10 TEA2260/61 140V adjustment 140V S.M.P.S. STARTING SYSTEM V CC VIDEO IDENTIFICATION AUTO VCR RECOGNITION 6 VCC /2 5 4 3 2µs 330Ω PWM STAGE 1.3V mute φ1 LS inhibition 11 12 S.M.P.S OUTPUT φ1 VCC 13 14 LINE LOGIC OSD burst 500kHz VREF 2 VCO 500kHz CBS503B LINE SYNCHRO SEPARATOR 100nF 470Ω control 15 1nF 100kΩ FRAME SECURITY DETECTION OSD 1nF burst 1 V CC 16 10kΩ 2.2kΩ Frame out φ2 100pF 1.3V LINE SAW-TOOTH GENERATOR VOLTAGE REFERENCE standard 50/60Hz & mute output reset 1.3V LINE OUTPUT inhibition FRAME SAW-TOOTH GENERATOR 24 LINE MONOSTABLE 50/60Hz & MUTE OUTPUT frame yoke voltage 1nF SUPERSAND CAST LE GENERAT OR ident 60Hz mute PHASE CONTROL LINE OUTPUT 50/60Hz mute FRAME LOGIC OSD FRAME SEPARATOR 200V DC 4.7MΩ 2.2Ω 220nF 17 18 19 20 21 22 23 Line V CC flyback 10 VPP V CC 3.3nF 3.32kΩ (1%) 1.5nF towards line driver 1kΩ 47kΩ 22nF 470kΩ φ2 adjust TEA2128 BLOCK DIAGRAM TEA2128 TAMB Supply Voltage Output Current Input Current Input Current Parameter Value 13.5 80 40 ± 5 Operating Ambient Temperature 0 , 70 Unit V mA mA mA o C THERMAL DATA Symbol Parameter Rth(j-a) Junction-ambient Thermal Resistance Value 60 Unit C/W o 2128-02.TBL Symbol VCC I11 I20 I22 2128-01.TBL ABSOLUTE MAXIMUM RATINGS ELECTRICAL CHARACTERISTICS (TAMB = 25oC; VCC = 12V; Pulse duration 50% of the amplitude) Symbol Parameter Supply Voltage Supply Current Pins Test conditions 13 13 Without load in Pins 11, 16, 21, 24 Min. Typ. 12 30 Max. Unit V mA 0.2 1 - 30 5 3 VPP µA µA -900 µA µA VIDEO INPUT Video Signal Amplitude Push out Current Pull in Current 4 4 4 Z source < 200Ω During the synch. pulse During the line 3 3 During the synch. pulse During the line - 350 25 ± 1.5 ± 0.5 50% SYNCH. PULSE CLAMP Push out Current Pull in Current φ 1 AND φ 3 COMPARATOR Short Time Output Current 7-8 Identification high Long Time Output Current 7-8 Identification high Catching Range Transfer Characteristic Free Running Frequency 2 mA mA VCO Ceramic CSB 503B, RSERIAL = 470Ω ∆F Pin 20/∆V Pin 8 Without video signal 15 16.3 kHz kHz/V kHz 500 6.3 mV V V -185 95 1 µA µA V V 200 V Ω µA 2 15.6 VIDEO IDENTIFICATI ON AND STANDARD OUTPUT No video on Pin 4 60Hz video 50Hz video 16 16 16 I16 = 3mA I16 = 3mA I16 = 10µA 5.7 10.5 0 6 11 -135 65 2 -160 80 VIDEO IDENTIFICATI ON AND O.S.D. CONTROL Identification Time Output Current 14 2µs pulse within the synchro pulse ● 2µs pulse outside the synchro pulse ● Identification Threshold OSD Switching Threshold µs 4.6 lower than REFERENCE VOLTAGE Output voltage Output impedance Max output current 6 I6 = 0 ∆I6 = ± 50µA VCC/2 600 AUTO VCR SWITCH 7 ● ● With no noise on the video (V5 ≤ 6V) ± 0.28 ± 0.3 ± 0.32 With noise on video St* (6V < V5 < 7.3V) St* = 0.69 V5 - 3.85 V 2128-03.TBL Switching threshold /V6 V 3/8 TEA2128 ELECTRICAL CHARACTERISTICS (continued) (TAMB = 25oC; VCC = 12V; Pulse duration 50% of the amplitude) Symbol Parameter Pins Test conditions Min. Typ. Max. Unit NOISE GATE Measure sampling time 5 Max. push out current On the synch. pulse bottom VCR switch inhibition threshold Measure bandwidth (-3dB) Short time constant manual switching threshold Long time constant Manual switching threshold µs µA 2 Max. noise 350 7.3 Active under threshold 700 4.5 From lower to higher voltage From higher to lower voltage 6.9 6.8 5 2000 5.5 V kHz V 7.3 7.2 7.6 7.5 V V φ 2 COMPARATOR (Pin 14) µA FVCO = 500 kHz ± 600 2.8 Output current During line flyback 23 -4 Delay between φ 2 falling edge and the middle video sync. pulse µs LINE MONOSTABLE Charge current 19 Line output high - 67 µA Discharge current 19 Line output low 120 µA Flip-Flop threshold 19 Falling edge on the line output 1.3 V LINE OUTPUT Low level Pulse duration 20 I20= 20 mA φ 2 adjustment range 20 R 18 = 3.32kΩ , C19 = 1.5nF Controlled by V23 compared with video signal Charge Current 17 R 18 = 3.32 kΩ Discharge Current Discharge Duration 17 27.5 29 1 30.5 V µs 16 µs - 180 7 6.5 µA mA LINE SAW-TOOTH Controlled by logic VCO 500kHz µs LINE FLYBACK INPUT Blanking Line Threshold φ 2 Loop Threshold and Line Output Inhibition Input Current 22 20 0.38 2.85 - 0.4V < V22 < 0.4V 0.4V < V22 < 3V 3V < V22 0.4 3 0.42 3.15 V V -1 µA µA µA -10 -5 SUPER SANDCASTLE GENERATOR Line Blanking Frame Blanking Delay between the midde of the video sync. pulse and the rising edge of the burst (t1) 21 21 21 4 2 t1 4/8 9 R L = 2.2 kΩ to ground V 4.5 2.5 2.8 5 3 V V µs 2128-04.TBL 21 2128-03.EPS Burst Level TEA2128 ELECTRICAL CHARACTERISTICS (continued) (TAMB = 25oC; VCC = 12V; Pulse duration 50% of the amplitude) Symbol Parameter Pins Test conditions Min. Typ. Max. Unit SUPER SANDCASTLE GENERATOR (continued) Burst Pulse Duration 50Hz 60Hz 21 21 ● Line Blanking Duration 22 Frame Blanking Duration 21 Fixed by flyback Signal pin 22 Fixed by the logic ● 4.4 3.9 µs µs 21 Line FRAME SAW-TO OTH GENERATOR Low DC Voltage Discharge Current 60Hz Internal 24 1 1 1.3 15 60 8 V mA µA FRAME LOGIC SYNCH. Free Running Period Synchronization Windows 1-24 Without video signal Identification low Identification 50Hz high Identification 60Hz high VCR mode 315 247 309 247 247 361 315 277 361 Line Line Line Line Line FRAME SAFETY INPUT Switching Threshold 15 Actived without negative pulse during frame blanking time. Output current 1.3 40 50 V 67 µA 2 µA µs/µV µs µs S.M.P.S. Input Current 10 tON (max.) tON (min.) High Level Voltage VPin 10 = VREF ∆tPin 11 / ∆VPin 10 Transfer Characteristic 1.9 28 1 11 11 11 Rloa d / GND = 500Ω 13 VCC rising 13 VCC decreasing 6.5 V Before soft start period, VCC > 7V VPin 9 > Vmax. Pin 17 ● During soft start period, VCC > 7V VPin 9 < Vmax. Pin 17 60 µA 2.3 µA 9 V SOFT-START VCC Starting Voltage for Line and S.M.P.S. Switch-off Voltage For Line and S.M.P.S. Output Discharge Current 9 7 ● 7.4 V V18 Voltage 18 Temperature Shift 18 R18 = 3.32 kΩ (1%) ∆T = 80oC GENERAL DESCRIPTION Introduction This integrated circuit uses high density I2L bipolar technologyand combines analogsignal processing with digital processing. Timing signals are obtained from a voltage-controlled oscillator (VCO) operating at 500kHz by means of a cheap ceramic resonator. This avoid the frequency adjustment normally required with line and frame oscillators. 1.21 1.3 1.39 V ±1 % 2128-05.TBL CURRENT REFERENCE A chain of dividers and appropriate logic circuitry produces very accurate defined sampling pulses and the necessary timing signals. Internal Functions - Horizontal scanning processor - Frame scanning processor - B class frame output stage using an external power amplifier with flyback generator - Line and frame synchronization separation - Dual phase-locked loop horizontal scanning 5/8 TEA2128 - High performance frame and line synchronization with interlacing control. - Supersandcastlegenerator - Automatic 50Hz / 60Hz standard identification - Frame saw-tooth generator - Video identification circuit - Very steady free running mode of the line and frame oscillator in OSD mode. This allows on screen display without phase Jitter in research mode of the tuner - Automatic VCR mode recognition for time constant switching - Switching mode regulated supply comprising error amplifier and phase modulator. This allowed a secondary switch mode power regulation with a master slave concept and provides active standby facilities - Line and S.M.P.S. start-up processor - Frame safety input WORKING DESCRIPTION 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 signal 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-interlaced video. An automatic synchronization window width system provides: - Fast frame capture (7.3ms wide window) - Good noise immunity (0.4ms narrow window) The internal generator starts the discharge of the sawtooth generator capacitor, so that it is not disturbed by line flyback effects. Thanks to the logic control, the beginning of the charge phase does not depend on any disturbing effect of the line flyback. A 32µs 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. 6/8 Horizontal Scanning The horizontalscanning frequency is obtainedfrom the 500kHz VCO. The circuit uses two PLL: - The first one controls the frequency - The second one controls the relative phase of the synchronization and the line flyback signals. The output pulse has a constant duration of 29µs, independent of VCC and of any delay in switchingoff the scanning transistor. Supersandcastle Generator This output delivers a 3 level synchronization signal: - Burst level - Line blanking level - Frame blanking level In the event of vertical scanning failure, the frame blanking level goes high to protect the tube. Frame Scanning The current to charge the frame sawtooth generator is automatically switched to 60Hz operation to maintain constant amplitude. Automatic VCR Mode Recognition for Time Constant Switching - A third phase comparator is used to detect VCR signals and to switch the φ1 short time constant. - A noise level measurement is realized on the video synchronization pulse to inhibit the short time constant if the noise level is superior to an adjustable threshold. - VCR signals are detected if peak to peak signal on Pin 7 is superior to an internal threshold. This threshold is depending on the noise level. So with a no noisy video signal, the auto VCR switch sensitivity is maximum, and it decreases when the noise increases. - The sensitivity of the noise gate and the auto VCR switch is adjustable by external resistance. - Long and short time constants can be selected manually by Pin 5. Video Identification The horizontal synchronization signal is sampled by a 2µs pulse within the synchronization pulse. The signal is integrated by an external capacitor. Identification Output The identification function provides three different levels : - 0V : No video identification - 6V : 60Hz video identification - 12V : 50Hz video identification TEA2128 This information may be used for timing research in the case of frequency or voltage synthetizer type receivers and for audio muting. O.S.D. Mode The O.S.D. (On Screen Display) function is available when Pin 14 is switch to ground. This function fixes line and frame frequencies to standard deflection frequencies (fH = 15.6kHz, fV = 50Hz) and inhibits Φ1 PLL. This allows to have a stable text display when no signal is coming from antenna. Switch Mode Power Supply Secondary to Primary Regulation This power supply uses a differential error amplifier with an internal reference voltage of 1.3V and a phase modulator operating at the line frequency. The power transistor is turned-off during the line retrace by the falling edge of the horizontal sawtooth. The maximum conduction angle may be monitored by forcing a voltage at Pin 9. This pin can also be used for current limitation. The output pulse is sent to the primary IC (TEA2260/61 via a low cost synchro transformer). S.M.P.S. Start-up Processor The ”soft-start” device imposes a very small conduction angle on starting-up. This angle progressively increases to its nominal regulation value. On starting-up the horizontal scanning function comes into operation at VCC = 7V. The power supply then comes into operation progressively. Frame Blanking Safety Input (Pin 15) The frame blanking safety checks the normal frame scanning. In the event of vertical scanning failure, the frame blanking level goes high to protect the CRT. 7/8 TEA2128 I a1 PACKAGE MECHANICAL DATA 24 PINS - PLASTIC SHRINK DIP Stand-off L b1 b b2 e E Z e3 D Stand-off 13 b3 Dimensions A a1 b b1 b2 b3 D E e e3 e4 F i L 12 Min. Millimeters Typ. 3.3 0.51 0.35 0.2 0.75 0.75 Max. Min. 0.59 0.36 1.42 0.020 0.014 0.008 0.030 0.030 23.11 9.73 7.95 Inches Typ. 0.130 0.023 0.014 0.056 0.910 0.383 0.313 1.778 19.558 7.62 0.070 0.770 0.300 6.86 5.08 2.54 Max. 0270 0.200 0.100 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. 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. 8/8 SDIP24.TBL 1 PMSDIP24.EPS F 24