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PDF TEA2037A Data sheet ( Hoja de datos )
| Número de pieza | TEA2037A | |
| Descripción | HORIZONTAL AND VERTICAL DEFLECTION MONITOR | |
| Fabricantes | ST Microelectronics | |
| Logotipo |  |
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TEA2037A
HORIZONTAL AND VERTICAL DEFLECTION MONITOR
. DIRECT LINE DARLINGTON DRIVE
. DIRECT FRAME-YOKE DRIVE (± 1A)
. COMPOSITE VIDEO SIGNAL INPUT CAPA-
BILITY
. FRAME OUTPUT PROTECTION AGAINST
SHORT CIRCUITS
. PLL
. HORIZONTAL OSCILLATOR FREQUENCY
RANGE FROM 15kHz TO 100kHz
. VERTICAL OSCILLATOR FREQUENCY
RANGE FROM 30Hz TO 120Hz
. VERY FEW EXTERNAL COMPONENT
. VERY LOW COST POWER PACKAGE
POWERDIP (8+8)
(Plastic Package)
ORDER CODE : TEA2037A
DESCRIPTION
The TEA2037Ais an horizontal and vertical deflec-
tion circuit. It uses the same concept as TEA2117
but optimised for small screens, for a very low cost
solution.
PIN CONNECTIONS
FRAME OSCILLATOR
FLYBACK GENERATOR SUPPLY
FRAME FLYBACK
GROUND
GROUND
INVERTING INPUT
FRAME POWER SUPPLY
FRAME OUTPUT
1
2
3
4
5
6
7
8
16 VCC1
15 VIDEO INPUT
14 LINE OUTPUT
13 GROUND
12 GROUND
11 LINE FLYBACK
10 PHASE DETECTOR
9 LINE OSCILLATOR
September 1996
1/9
1 page  
Figure 3 : Line Oscillator
Phase
Comparator
Output
R5
9
R4
TEA2037A
VCC1
Figure 4 : Phase Comparator
Line
Flyback
Integrated
Flyback
current for the other part. When the line flyback and
the video signal are synchronized, the output of the
comparatoris an alternativelynegative and positive
current. The frame sync-pulse inhibits the compa-
rator to prevent frequency drift of the line oscillator
on the frame beginning.
Figure 5
VCC1
VC
Sync Pulse
11
10
Output
Current
ST2
The sync-pulse drives the current in the compara-
tor. The line flyback integrated by the external
network gives on pin 11 a saw tooth, the DC offset
of this saw tooth is fixed by VC. The comparator
output provides a positive current for the part of the
signal on pin 11 greater than to VC and a negative
ST1
VC
5/9
5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet TEA2037A.PDF ] | |
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