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TDA8218
HORIZONTAL AND VERTICAL DEFLECTION CIRCUIT
. . . . . . . .
DIRECT FRAME-YOKE DRIVE ( 1A) COMPOSITE VIDEO SIGNAL INPUT CAPABILITY FRAME OUTPUT PROTECTION AGAINST SHORT CIRCUITS PLL SUPER SANDCASTLE OUTPUT VERY FEW EXTERNAL COMPONENTS VERY LOW COST POWER PACKAGE STABLE FRAME BLANKING PULSE, GENERATED BY EXTERNAL RC, FOR COMPATIBILITY WITH TEA 5640
POWERDIP 16 + 2 + 2 (Plastic Package) ORDER CODE : TDA8218
DESCRIPTION The TDA8218 is an horizontal and vertical deflection circuit with super sandcastle generator. Used with automatic PAL/SECAM decoder TEA5640, this IC permits a complete low-cost solution for PAL/SECAM applications. PIN CONNECTIONS
V CC1 FRAME OSCILLATOR V CC2 FRAME FLYBACK GENERATOR GROUND GROUND POWER AMPLIFIER INPUT FRAME BLANKING R.C. NETWORK FRAME POWER SUPPLY FRAME OUTPUT
1 2 3 4 5 6 7 8 9 10
20 19 18 17 16 15 14 13 12 11
VIDEO INPUT SUPER SANDCASTLE OUTPUT LINE FLYBACK LINE OUTPUT GROUND GROUND BURST KEY R.C. NETWORK LINE SAWTOOTH INPUT PHASE DETECTOR
8218-01.EPS
LINE OSCILLATOR
September 1993
1/9
TDA8218
BLOCK DIAGRAM
Vcc2
Vcc1
Vcc1
1
Frame
2
9
3
4
8
blanking generator
Frame oscillator
Power
s tag e +
Flyback generator
YOKE
10
F.B. RC
19
Line flyback detector Frame-Synchro g enerator
Output stage
7
Phase
detector
Video
17
Input
20
Input stage Burst gate pulse generator
18
Line Flyback
Line oscillator
14
13
12
11
Vcc1
8218-02.EPS
Vcc1
ABSOLUTE MAXIMUM RATINGS
Symbol VCC1 VCC2 V9 I10NR I10 V17 IP17 IC17 TSTG TJ TAMB Supply Voltage Flyback Generator Supply Voltage Frame Power Supply Voltage Frame Output Current (non repetitive) Frame Output Current (continuous) Line Output Voltage (external) Line Output Peak Current Line Output Continuous Current Storage Temperature Max Operating Junction Temperature Operating Ambient Temperature Parameter Value 30 35 60 1.5 1 60 0.8 0.4 -40 to + 150 + 150 0 to 70 Unit V V V A A V A A
o o o
C C
THERMAL DATA
Symbol R TH(j-c) RTH(j-a) TJ Parameter Max Junction-case Thermal Resistance Typical Junction-ambient Thermal Resistance
(Soldered on a 35m thick 45cm PC Board copper area)
2
Value 10 40 120
Unit
o o
C/W
8218-02.TBL
C/W
o
Max Recommended Junction Temperature
C
2/9
8218-01.TBL
C
TDA8218
ELECTRICAL CHARACTERISTICS VCC1 = 10 V, TAMB = 25 oC (unless otherwise specified )
Symbol SUPPLY (Pin 1) ICC1 VCC1 V20 MWF Supply Current Supply Voltage Reference Voltage (I20 = -1A) Minimum Width of Frame Pulse (when synchronized with TTL signal) Low Threshold Voltage High Threshold Voltage Bias Current Discharge Impedance Free Running Line Period (R = 34.9k Tied to VCC1, C = 2.2nF Tied to Ground) Oscillator Threshold for Line Output Pulse Triggering Horizontal Frequency Drift with Temperature (see application) 9 1.4 50 15 10 1.75 22 10.5 2 mA V V s Parameter Min. Typ. Max. Unit
VIDEO INPUT (Pin 20)
LINE OSCILLATOR (Pin 11) LT11 HT11 BI11 DR11 FLP1 OT11 F LV17 OPW V13 Z13 I12 RI12 LI12 CV12 2.8 5.4 1.0 62 3.2 6.6 100 1.4 64 4.6 2 3.6 7.8 1.8 66 V V nA k s V Hz/ C
o
LINE OUTPUT (Pin 17) Saturation Voltage (I17 = 200mA) Output Pulse width (line period = 64s) Bias Voltage Input Impedance Output Current During Synchro Pulse Current Ratio (positive/negative) Leakage Current Control RangeVoltage External R.C. Network (Typical values : R = 100k, C = 22nF) Blanking Time (PIn 19, Tfb = K8 .R.C.) Time Blanking Coefficient Output Current during the Frame Blanking : V8 = 2V Input Current after the Frame Blanking : V8 = 7V Low Threshold Voltage High Threshold Voltage LT2 - HT2 Bias Current Discharge Impedance Free Running Frame Period (R = 866k Tied to VCC1, C = 220nF Tied to Ground) Minimum Frame Period (I20 = -100A) with the Same RC Frame Period Ratio = FFP/MFP 26 1.8 4.5 250 0.95 -2 2.60 1.1 28 2.4 5.8 350 1 1.6 30 3.2 8 500 1.05 +2 7.10 V s V k A A V
LINE SAWTOOTH INPUT (Pin 13)
PHASE DETECTOR (Pin 12)
FRAME BLANKING GENERATOR (Pin 8) Tfb K8 IO8 II8 LT2 HT2 DIF2 BI2 DR2 FFP1 MFP FPR 1.35 0.613 - 0.2 450 2.0 3.1 1.0 30 470 23 12.8 1.8 ms 0.644 1 600 2.3 3.6 A A V V V nA ms ms 1.9
8218-03.TBL
0.588 300 1.6 2.6
FRAME OSCILLATOR (Pin 2)
300 20.5
700 25
1.7
3/9
TDA8218
ELECTRICAL CHARACTERISTICS VCC1 = 10 V, T AMB = 25 oC (unless otherwise specified )
Symbol FRAME OSCILLATOR (Pin 2) (continued) FG F V9 I9 VCC2 Frame Saw-tooth Gain Between Pin 1 and non Inverting Input of the Frame Amplifier Vertical Frequency Drift with Temperature (see application) -0.4 4.10
-3
Parameter
Min.
Typ.
Max.
Unit
Hz/ C
o
FRAME POWER SUPPLY (Pin 9) Operating Voltage (with flyback Generator) Supply Current (V9 = 30V) Operating Voltage Saturation Voltage to Ground (V9 = 30V) I10 = 0.1A I10 = 1A Saturation Voltage to V9 (V9 = 30V) I10 = -0.1A I10 = -1A Saturation Voltage to V9 in Flyback Mode (V10 > V9) I10 = 0.1A I10 = 1A Flyback Transistor on (output = high state), VCC2 = 30V, V4/3 with I4 3 = 0.1A I4 3 = 1A Flyback Transistor on (output = high state), VCC2 = 30V, V3/4 with I3 4 = 0.1A I3 4 = 1A Flyback Transistor off (output = V9 - 8V), V9 - VCC2 = 30V Leakage Current Pin 3 Output Voltages (R load = 2.2k) Frame blanking pulse level Line blanking pulse level Burst key pulse level Pulses width and timing Delay between middle of sync pulse and leading edge of burst key pulse Duration of burst key pulse Vertical blanking pulse width : Defined by external R.C. Pin 8 Switching level Maximum imput current at VPEAK = 800V Limiting voltage at maximum current RC network time constant (Note 1) for the burst key pulse 10 9 10 58 15 30 V mA V
FLYBACK GENERATOR SUPPLY (Pin 3) FRAME OUTPUT (Pin 10) LV10A LV10B HV10A HV10B FV10A FV10B 0.06 0.37 1.3 1.7 1.6 2.5 0.6 1 1.6 2.4 2.1 4.5 V V V V V V
FLYBACK GENERATOR (Pin 3 and Pin 4) F2DA F2DB FSVA FSVB FCI 1.5 3.0 0.8 2.2 2.1 4.5 1.1 4.5 170 V V V V A
SUPER SANDCASTLE OUTPUT (Pin 19) SANDT2 SANDL2 BG2 SC3 SC2 2 4 8 2.3 3.7 2.5 4.5 9 2.7 4 3 5 V V V s s
3.1 5
LINE FLYBACK INPUT (Pin 18) 2 8 4.3 6 V mA V S
Note :
1. An RC network is connected to this input. Typical value for the resistor is 27k and 220pF for the capacitor. A different time constant for RC changes the delay between the middle of the line synchro pulse and the leading edge of the burst key pulse but also the duration of the burst key pulse.
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8218-04.TBL
TDA8218
GENERAL DESCRIPTION The TDA8218 performs all the video and power functions required to provide signals for the line driver and frame yoke. It contains: * A synchronization separator * An integrated frame separator without external components Figure 1 : Synchronization Separator Circuit
* * * * *
A saw-tooth generator for the frame A power amplifier for direct drive of frame yoke (short circuit protected) An open collector output for the line driver A line phase detector and a voltage control oscillator A super sandcastle generator.
SL1 VR
SL2
20
Video R1
The slice level of sync-separation is fixed by value of the external resistors R1 and R2. VR is an internally fixed voltage. Figure 2 : Frame Separator
Vz
Q3 Q4
I Vz /2 SL1 3I
ST1
ST2
The sync-pulse allows the discharge of the capacitor by a 2 x I current. A line sync-pulse is not able to discharge the capacitor under VZ/2. A frame
sync-pulse permits the complete discharge of the capacitor, so during the frame sync-pulse Q3 and Q4 provide current for the other parts of the circuit.
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8218-04.EPS
8218-03.EPS
R2
TDA8218
Figure 3 : Line Oscillator
Vcc1
R5
11
Phase comparator output R4
The oscillator thresholds are internally fixed by resistors. The discharge of the capacitor depends on the internal resistor R4. The control voltage is applied on resistor R5. The sync-pulse drives the current in the comparator. The line flyback integrated by the external net work gives on pin 13 a saw tooth, the DC offset of this saw tooth is fixed by VC. The comparator Figure 4 : Phase Comparator
output provides a positive current for the part of the signal on pin 13 greater than to VC and a negative current for the other part. When the line flyback and the video signal are synchronized, the output of the comparator is an alternatively negativeand positive current. The frame sync-pulse inhibits the comparator to prevent frequency drift of the line oscillator on the frame beginning. Figure 5
Vcc1
Line Flyback Integrated Flyback Vc
SL2
12 13
Vc
Sync pulse
ST1
8218-06.EPS
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8218-07.EPS
Output Current
8218-05.EPS
TDA8218
Line output (Pin 17) It is an open-collector output. The output positive pulse time is 28s for a 64s period. The oscillator thresholds are internally fixed by resistors. The oscillator is synchronized during the last half free run period. The input current during the charge of the capacitor is less than 100nA. Frame output amplifier This amplifier is able to drive directly the frame yoke. Its output is short circuit and overload protected; it contains also a thermal protection. The line flyback detection is provided by a comparator which compares the input line flyback pulse to an internal reference. The burst gate pulse position is fixed by the external RC network (pin 14). It Figure 6 : Frame Oscillator
Vcc1
is referenced to the middle of the line flyback. The frame blanking generator is a monostable with external R.C. The start blanking pulse is triggered by the falling edge of the frame saw-tooth (Pin 2). The reset is provided by a comparator which compares the capacitor voltage during its charge to an internal threshold fixed by resistors. The frame blanking time is defined by : Tfb = 0.613 R.C. This pulse is available on Super Sand Castle output (Pin 19). Remark : For compatability with TEA5640, frame blanking time must be larger than 1.15ms with centered value @ 1.35ms (R = 100k 1%, C = 22nF 5%)
INPUT CURRENT COMPENSATION
2
Frame sync pulse
To frame amplifier
Figure 7 : Super sandcastle generator
Line Flyback Input Vcc1 Line Flyback Detection
18
Vcc1 R Vcc1 C BurstKey RC Network
RC
8
Frame Blanking Generator
Burst gate pulse generator
19
SSC Output
14
8218-09.EPS
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8218-08.EPS
TDA8218
TYPICAL APPLICATION
Vcc +24V Vcc1 100F 100nF 866k 27k 100k 1% 220nF 10% 2 Video Input 1.5k 120pF 220nF 560k 15k Line Flyback 68pF 22nF 13 22nF 7 18 12 100k 100k 2.2nF 12nF 22k 22k 100 Horizontal Frequency 2.2k Vcc1 SSC Vcc1
8218-10.EPS
4.7 100nF 470F
IN4002
220pF
47F 22nF 5% 1 8 3 9 4
IN4148
100nF 2.2
14 10 20
TDA 8218
220k 11 5 6 15 16 19 17 680pF
Frame Yoke 30 mH, 15 Ipp = 840mA 220k
270
220nF 22k 100 Vertical Amplitude
1000F
180pF 4.7k 1F
1
Note :
Pins 5 - 6 : Frame oscillator ground Pins 15 - 16 : Frame and line power ground
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TDA8218
PACKAGE MECHANICAL DATA 20 PINS - POWER DIP 16 + 2+ 2
a1
I
b Z e3
B
e Z
L
b1
E
D
20
11
F
1
10
Dimensions a1 B b b1 D E e e3 F i L Z
Min. 0.51 0.85 0.38
Millimeters Typ.
Max. 1.4
Min. 0.020 0.033 0.015
Inches Typ.
Max. 0.055
0.5 0.5 24.8 8.8 2.54 22.86 7.1 5.1 3.3 1.27
0.020 0.020 0.976 0.346 0.100 0.900
DIP20PW.TBL
0.280 0.201 0.130 0.050
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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PMDIP20W.EPS

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