TDA8218.PDF

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HORIZONTAL AND VERTICAL DEFLECTION CIRCUIT
TDA8218
HORIZONTAL AND VERTICAL DEFLECTION CIRCUIT
. FRAME OUTPUT PROTECTION AGAINST
SHORT CIRCUITS
. PLL
. SUPER SANDCASTLE OUTPUT
. VERY FEW EXTERNAL COMPONENTS
. VERY LOW COST POWER PACKAGE
. STABLE FRAME BLANKING PULSE, GEN-
ERATED BY EXTERNAL RC, FOR COMPATI-
BILITY WITH TEA 5640
POWERDIP 16 + 2 + 2
(Plastic Package)
ORDER CODE : TDA8218
DESCRIPTION
The TDA8218 is an horizontal and vertical deflec-
tion 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
1
20
VIDEO INPUT
FRAME OSCILLATOR
2
19
SUPER SANDCASTLE OUTPUT
V CC2
3
18
LINE FLYBACK
FRAME FLYBACK GENERATOR
4
17
LINE OUTPUT
GROUND
5
16
GROUND
GROUND
6
15
GROUND
POWER AMPLIFIER INPUT
7
14
BURST KEY R.C. NETWORK
FRAME BLANKING R.C. NETWORK
8
13
LINE SAWTOOTH INPUT
FRAME POWER SUPPLY
9
12
PHASE DETECTOR
FRAME OUTPUT
10
11
LINE OSCILLATOR
September 1993
1/9
. DIRECT FRAME-YOKE DRIVE ( ± 1A)
. COMPOSITE VIDEO SIGNAL INPUT CAPA-
BILITY
11039365.002.png
TDA8218
BLOCK DIAGRAM
Vcc2
Vcc1
Vcc1
1
2
9
3
4
Frame
blanking
generator
Frame
oscillator
Power
stage
Flyback
8
generator
YOKE
+
-
F.B. RC
10
19
S
7
Frame-Synchro
g enerator
Line flyback
Output
stage
17
Video
Input
detector
Phase
detector
20
18
Input
stage
Burst gate pulse
generator
Line
oscillator
14
13
12
11
Line
Flyback
Vcc1
Vcc1
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Value
Unit
V CC 1
Supply Voltage
30
V
V CC 2
Flyback Generator Supply Voltage
35
V
V9
Frame Power Supply Voltage
60
V
I10 NR
Frame Output Current (non repetitive)
±
1.5
A
I10
Frame Output Current (continuous)
±
1
A
V17
Line Output Voltage (external)
60
V
I P 17
Line Output Peak Current
0.8
A
I C 17
Line Output Continuous Current
0.4
A
T STG
Storage Temperature
-40 to + 150
o
C
T J
Max Operating Junction Temperature
+ 150
o C
T AMB
Operating Ambient Temperature
0 to 70
o
C
THERMAL DATA
Symbol
Parameter
Value
Unit
R TH(j-c)
Max Junction-case Thermal Resistance
10
o C/W
R TH(j-a)
Typical Junction-ambient Thermal Resistance
(Solderedon a 35
m thick45cm 2 PCBoard copperarea)
40
o C/W
m
T J
Max Recommended Junction Temperature
120
o C
2/9
11039365.003.png
TDA8218
ELECTRICAL CHARACTERISTICS
V CC1 =10V,T AMB =25 o C (unless otherwise specified )
Symbol
Parameter
Min. Typ. Max. Unit
SUPPLY (Pin 1)
I CC1
Supply Current
15
22
mA
V CC1
Supply Voltage
9
10
10.5
V
VIDEO INPUT (Pin 20)
V20
Reference Voltage (I20 = -1
m
A)
1.4
1.75
2
V
MWF
Minimum Width of Frame Pulse
(when synchronized with TTL signal)
50
m
s
LINE OSCILLATOR (Pin 11)
LT11
Low Threshold Voltage
2.8
3.2
3.6
V
HT11
High Threshold Voltage
5.4
6.6
7.8
V
BI11
Bias Current
100
nA
DR11
Discharge Impedance
1.0
1.4
1.8
k
W
FLP1
Free Running Line Period
(R = 34.9k
62
64
66
m
s
W
Tied to V CC1 , C = 2.2nF Tied to Ground)
OT11
Oscillator Threshold for Line Output
Pulse Triggering
4.6
V
F
Dq
Horizontal Frequency Drift with Temperature (see application)
2
Hz/ o C
LINE OUTPUT (Pin 17)
LV17
Saturation Voltage (I 17 = 200mA)
1.1
1.6
V
OPW
Output Pulse width (line period = 64
m
s)
26
28
30
m
s
LINE SAWTOOTH INPUT (Pin 13)
V13
Bias Voltage
1.8
2.4
3.2
V
Z13
Input Impedance
4.5
5.8
8
k
W
PHASE DETECTOR (Pin 12)
I12
Output Current During Synchro Pulse
250
350
500
m
A
RI12
Current Ratio (positive/negative)
0.95
1
1.05
LI12
Leakage Current
-2
+2
m
A
CV12
Control RangeVoltage
2.60
7.10
V
FRAME BLANKING GENERATOR (Pin 8)
External R.C. Network (Typical values : R = 100k
W
, C = 22nF)
T fb
Blanking Time (PIn 19, T fb = K8 .R.C.)
1.35
ms
K8
Time Blanking Coefficient
0.588 0.613 0.644
I O8
Output Current during the Frame Blanking : V 8 = 2V
- 0.2
1
m
A
I I8
Input Current after the Frame Blanking : V 8 = 7V
300
450
600
m
A
FRAME OSCILLATOR (Pin 2)
LT2
Low Threshold Voltage
1.6
2.0
2.3
V
HT2
High Threshold Voltage
2.6
3.1
3.6
V
DIF2
LT2 - HT2
1.0
V
BI2
Bias Current
30
nA
DR2
Discharge Impedance
300
470
700
W
FFP1
Free Running Frame Period
(R = 866k
20.5
23
25
ms
W
Tied to V CC 1, C = 220nF Tied to Ground)
MFP
Minimum Frame Period (I20 = -100
m
A) with the Same RC
12.8
ms
FPR
Frame Period Ratio = FFP/MFP
1.7
1.8
1.9
3/9
D
11039365.004.png
TDA8218
ELECTRICAL CHARACTERISTICS
V CC1 =10 V,T AMB =25 o C (unless otherwise specified )
Symbol
Parameter
Min.
Typ. Max. Unit
FRAME OSCILLATOR (Pin 2) (continued)
FG
Frame Saw-tooth Gain Between Pin 1 and non Inverting Input of the
Frame Amplifier
-0.4
F
Dq
Vertical Frequency Drift with Temperature (see application)
4.10 -3
Hz/ o C
FRAME POWER SUPPLY (Pin 9)
V9
Operating Voltage (with flyback Generator)
10
58
V
I9
Supply Current (V9 = 30V)
9
15
mA
FLYBACK GENERATOR SUPPLY (Pin 3)
V CC 2
Operating Voltage
10
30
V
FRAME OUTPUT (Pin 10)
Saturation Voltage to Ground (V9 = 30V)
LV10A
I10 = 0.1A
0.06
0.6
V
LV10B
I10 = 1A
0.37
1
V
Saturation Voltage to V9 (V9 = 30V)
HV10A I10 = -0.1A
1.3
1.6
V
HV10B I10 = -1A
1.7
2.4
V
Saturation Voltage to V9 in Flyback Mode (V10 > V9)
FV10A I10 = 0.1A
1.6
2.1
V
FV10B I10 = 1A
2.5
4.5
V
FLYBACK GENERATOR (Pin 3 and Pin 4)
Flyback Transistor on (output = high state), V CC2 = 30V, V4/3 with
F2DA
F2DB
I 4 "
3 = 0.1A
1.5
3.0
2.1
4.5
V
V
Flyback Transistor on (output = high state), V CC2 = 30V, V3/4 with
FSVA
FSVB
I 3 " 4 = 0.1A
I 3 " 4 =1A
0.8
2.2
1.1
4.5
V
V
Flyback Transistor off (output = V9 - 8V), V9 - V CC2 = 30V
FCI
Leakage Current Pin 3
170
m
A
SUPER SANDCASTLE OUTPUT (Pin 19)
Output Voltages (R load = 2.2k
W
)
SANDT2 Frame blanking pulse level
2
2.5
3
V
SANDL2 Line blanking pulse level
4
4.5
5
V
BG2
Burst key pulse level
8
9
V
Pulses width and timing
SC3
Delay between middle of sync pulse and leading edge of burst key pulse
2.3
2.7
3.1
m
s
SC2
Duration of burst key pulse
Vertical blanking pulse width : Defined by external R.C. Pin 8
3.7
4
5
m
s
LINE FLYBACK INPUT (Pin 18)
Switching level
2
V
Maximum imput current at V PEAK = 800V
8
mA
Limiting voltage at maximum current
4.3
V
t
RC network time constant (Note 1) for the burst key pulse
6
m
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.
W
4/9
D
I 4 "
3 =1A
11039365.005.png
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 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 synchronization separator
•
A line phase detector and a voltage control os-
cillator
An integrated frame separator without external
components
•
A super sandcastle generator.
•
Figure 1 : Synchronization Separator Circuit
SL1
SL2
VR
20
Video
R1
R2
The slice level of sync-separation is fixed by value of the external resistors R1 and R2. V R is an internally
fixed voltage.
Figure 2 : Frame Separator
Vz
Q3
Q4
I
ST1
ST2
Vz /2
SL1
3I
The sync-pulse allows the discharge of the capaci-
tor by a 2 x I current. A line sync-pulse is not able
to discharge the capacitor under V Z /2. A frame
sync-pulse permits the complete discharge of the
capacitor, so during the frame sync-pulse Q 3 and
Q 4 provide current for the other parts of the circuit.
5/9
11039365.001.png

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