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PDF TDA8218 Data sheet ( Hoja de datos )

Número de pieza TDA8218
Descripción HORIZONTAL AND VERTICAL DEFLECTION CIRCUIT
Fabricantes ST Microelectronics 
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TDA8218
HORIZONTAL AND VERTICAL DEFLECTION CIRCUIT
. DIRECT FRAME-YOKE DRIVE (± 1A)
. COMPOSITE VIDEO SIGNAL INPUT CAPA-
BILITY
. 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
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
POWERDIP 16 + 2 + 2
(Plastic Package)
ORDER CODE : TDA8218
VCC1
FRAME OSCILLATOR
VCC2
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 VIDEO INPUT
19 SUPER SANDCASTLE OUTPUT
18 LINE FLYBACK
17 LINE OUTPUT
16 GROUND
15 GROUND
14 BURST KEY R.C. NETWORK
13 LINE SAWTOOTH INPUT
12 PHASE DETECTOR
11 LINE OSCILLATOR
September 1993
1/9

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TDA8218 pdf
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 os-
cillator
A super sandcastle generator.
Video
VR
20
R1
R2
SL1 SL2
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
I
SL1
3I
Q3
ST1
Vz /2
Q4
ST2
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 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.
5/9

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