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TDA4951
TELEFUNKEN Semiconductors
Rev. A1, 19-Jul-96
1 (5)
TV East/ West Correction Circuit for Square Tubes
Technology: Bipolar
Features
D Low dissipation
D Square generator for parabolic current specially
designed for square C.R.T. correction
D External keystone adjustment
(symmetry of the parabola)
D Input for dynamic field correction
(beam current change)
D Static picture width adjustment
D Pulse-width modulator
D Final stage D-class with energy redelivery
D Parasitic parabola suppression, during flyback time of
the vertical sawtooth
Figure 1. Block diagram
Absolute Maximum Ratings
Parameters
Symbol
Value
Unit
Supply voltage
Pin 6
V
S
35
V
Supply current
Pin 6
I
S
500
mA
Substrate current
Pin 5
I
5
400
mA
Power dissipation
T
case
= 50
C
P
tot
500
mW
Storage temperature range
T
stg
25 to +150
C
Junction temperature
T
j
25 to +150
C
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TDA4951
TELEFUNKEN Semiconductors
Rev. A1, 19-Jul-96
2 (5)
Electrical Characteristics
V
S
= 26 V, T
amb
= 25
C, test circuits 1 to 5
Parameters
Test Conditions / Pins
Symbol
Min.
Typ.
Max.
Unit
Supply voltage range
Pin 6
V
S
17
24
30
V
Supply current,
Test circuit 1
Pin 6
I
S
4.5
7
mA
Reference voltage
Test circuit 1
Pin 3
V
ref
7.6
8.0
8.8
V
Voltage at Pin 7
Test circuit figure 2, Pin 7
I
f
= 0
mA
V
7A
15 3
16 0
16 7
V
I
fr
= 0
mA
I
fr
= 20
mA
V
7A
V
7C
15.3
16.0
15.4
16.7
V
Parabola coefficient
K
1
+
V
7A
V
7B
V
7A
V
7C
K
1
26
%
K
2
+
V
7A
V
7C
V
7A
V
7D
K
2
34
%
Difference, figure 2
V
DE7
+ V
7E
V
7F
V
DE7
40
0
40
mV
Current source
Test circuit 3
Pin 8
I
8
100
mA
Saturation voltage
I
5
= 400 mA,
Test circuit 4
Pin 5
V
satL
1
2
V
Saturation voltage
I
5
= 100 mA,
Test circuit 5
Pin 5
V
satH
0.8
1.5
V
Forward voltage
I
5
= 400 mA,
Test circuit 5
Pin 5
V
F
1.2
1.7
V
Forward voltage
(substrate diode)
I
5
= 100 mA,
Test circuit 4
Pin 5
V
5
0.8
1.2
V
V
7
V
7B
V
7C
V
7D
V
7E
60
0
10
20
35
60
mA
V
7F
I
FR
V
7A
93 7666
Figure 2. Parabola coefficients
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TDA4951
TELEFUNKEN Semiconductors
Rev. A1, 19-Jul-96
5 (5)
Ozone Depleting Substances Policy Statement
It is the policy of TEMIC TELEFUNKEN microelectronic GmbH to
1. Meet all present and future national and international statutory requirements.
2. Regularly and continuously improve the performance of our products, processes, distribution and operating systems
with respect to their impact on the health and safety of our employees and the public, as well as their impact on
the environment.
It is particular concern to control or eliminate releases of those substances into the atmosphere which are known as
ozone depleting substances ( ODSs ).
The Montreal Protocol ( 1987 ) and its London Amendments ( 1990 ) intend to severely restrict the use of ODSs and
forbid their use within the next ten years. Various national and international initiatives are pressing for an earlier ban
on these substances.
TEMIC TELEFUNKEN microelectronic GmbH semiconductor division has been able to use its policy of
continuous improvements to eliminate the use of ODSs listed in the following documents.
1. Annex A, B and list of transitional substances of the Montreal Protocol and the London Amendments respectively
2 . Class I and II ozone depleting substances in the Clean Air Act Amendments of 1990 by the Environmental
Protection Agency ( EPA ) in the USA
3. Council Decision 88/540/EEC and 91/690/EEC Annex A, B and C ( transitional substances ) respectively.
TEMIC can certify that our semiconductors are not manufactured with ozone depleting substances and do not contain
such substances.
We reserve the right to make changes to improve technical design and may do so without further notice.
Parameters can vary in different applications. All operating parameters must be validated for each customer
application by the customer. Should the buyer use TEMIC products for any unintended or unauthorized
application, the buyer shall indemnify TEMIC against all claims, costs, damages, and expenses, arising out of,
directly or indirectly, any claim of personal damage, injury or death associated with such unintended or
unauthorized use.
TEMIC TELEFUNKEN microelectronic GmbH, P.O.B. 3535, D-74025 Heilbronn, Germany
Telephone: 49 ( 0 ) 7131 67 2831, Fax number: 49 ( 0 ) 7131 67 2423
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