|
|
PDF TDA8145 Data sheet ( Hoja de datos )
| Número de pieza | TDA8145 | |
| Descripción | TV EAST/WEST CORRECTION CIRCUIT FOR SQUARE TUBES | |
| Fabricantes | ST Microelectronics | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de TDA8145 (archivo pdf) en la parte inferior de esta página. Total 9 Páginas | ||
|
No Preview Available !
TDA8145
TV EAST/WEST CORRECTION CIRCUIT
FOR SQUARE TUBES
FEATURES SUMMARY
■ LOW DISSIPATION
■ SQUARE GENERATOR FOR PARABOLIC
CURRENT SPECIALLY DESIGNED FOR
SQUARE C.R.T. CORRECTION
Figure 1. Package
■ EXTERNAL KEYSTONE ADJUSTMENT
(symmetry of the parabola)
■ INPUT FOR DYNAMIC FIELD CORRECTION
)(beam current change)
t(s■ STATIC PICTURE WIDTH ADJUSTMENT
c■ PULSE-WIDTH MODULATOR
u■ FINAL STAGE D-CLASS WITH ENERGY
rodREDELIVERY
P■ PARASITIC PARABOLA SUPPRESSION,
DURING FLYBACK TIME OF THE VERTICAL
teSAWTOOTH
bsoleDESCRIPTION
OThe TDA8145 is a monolithic integrated circuit in a
-8 pin minidip plastic package designed for use in
)the square C.R.T. east-west pin-cushion correc-
t(stion by driving a diode modulator in TV and moni-
ctor applications.
duFigure 2. Pin Connections (top view)
POWERDIP8
(Plastic Package)
solete ProKEYSTONE CORRECTION INPUT
ObFRAME SAWTOOTH CURRENT INPUT
1
2
8 NON-INVERTING INPUT 100µA CURRENT SINK
7 PARABOLA OUTPUT INVERTING INPUT
CURRENT REFERENCE
3
6 +VS
GND
4
5 OUTPUT
May 2004
REV. 2
1/9
1 page  
Figure 6. Application Circuit with Keystone Correction
Line Transformer
(L.T.)
TDA8145
LM
L1
10mH
Pin-cushion
adjustment
R3 RT2
uct(s)Pin 1
t(s) - Obsolete ProdVoltage
R1 = VFRAME
66µAPP
4.7kΩ
5
47kΩ
7
R4
18kΩ
C1
47nF
VFRAME
2
TDA8145
6
VS
1
C2
100nF
3 48
RT1
Keystone 100kΩ
Adj.
R2
12kΩ
C3
4.7nF
D1
1N4148
Hfly
from L.T. R5
1kΩ
RT3
H. Width
roducCIRCUIT OPERATION
P(see the shematic diagram)
teA differential amplifier OP1 is driven by a vertical
lefrequency sawtooth current of ± 33µA which is
oproduced via an external resistor fromthe saw-
stooth voltage. The non–inverting input of this am-
bplifier is connected with a reference voltage
Ocorresponding to the DC level of the sawtooth volt-
If the input is overmodulated (> 40µA) the internal
current is limited to 40µA. This limitation can be
used for suppressing the parasitic parabolic cur-
rent generated during the flyback time of the frame
sawtooth.
A comparator OP2 is driven by the parabolic cur-
rent. The second input of the comparator is con-
age. This DC voltage should be adjustable for the nected with a horizontal frequency sawtooth
keystone correction. The rectified output current of voltage the DC level of which can be changed by
this amplifier drives the parabola networkwhich the external circuitry for the adjustment of the pic-
provides a parabolic output current.
ture width.
This output current produces the corresponding
voltage due to the voltage drop across the external
resistor at pin 7.
The horizontal frequency pulse–width modulated
output signal drives the final stage. It consists of a
class D push–pull output amplifier that drives, via
an external inductor, the diode modulator.
5/9
5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet TDA8145.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| TDA8140 | HORIZONTAL DEFLECTION POWER DRIVER | ST Microelectronics |
| TDA8143 | HORIZONTAL DEFLECTION POWER DRIVER | ST Microelectronics |
| TDA8145 | TV EAST/WEST CORRECTION CIRCUIT FOR SQUARE TUBES | ST Microelectronics |
| TDA8146 | EAST/WEST CORRECTION FOR RECTANGULAR TV-TUBES | ST Microelectronics |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |