SGS Thomson Microelectronics TDA8145 Datasheet
TV EAST/WEST CORRECTION CIRCUIT
.
LOW DISSIPATION
.
SQUARE GENERATOR FOR PARABOLIC
CURRENT SPECIALLY DESIGNED FOR
SQUARE C.R.T. CORRECTION
.
EXTERNAL KEYSTONE ADJUSTMENT
(symmetry of the parabola)
.
INPUT FOR DYNAMIC FI ELD CORRECTION
(beam current change)
.
STATIC PICTURE WIDTH ADJUSTMENT
.
PULSE-WIDTH MODULATOR
.
FINAL STAGE D-CLASS WITH ENERGY
REDELIVERY
.
P ARASITIC PARABOLA SUPPRESSION,
DURING FLYBACK TIME OF THE
VERTICAL SAWTOOTH
TDA8145
FOR SQUARE TUBES
POWERDIP8
(Plastic Package)
(Th = 0.4mm)
DESCRIPTION
The 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 correction
by driving a diode modulator in TV and monitor
applications.
PIN CONNECTIONS (top view)
KEYSTONE CORRECTION INPUT
FRAME SAWTOOTH CURRENT INPUT
CURRENT REFERENCE
GND
1
2
3
4
ORDER CODE :
8
NON-INVERTING INPUT 100
7
PARABOLA OUTPUT INVERTING INPUT
+V
6
5
S
OUTPUT
TDA8145
A CURRENT SINK
µ
October 1998
8145-01.EPS
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TDA8145
SCHEMATIC DIAGRAM
TDA8145
1
2
I
IN
VS - 3 V
Q7
CURRENT LIMITER
BE
OP1
VS - 6 V
BE
Q1
Q2
R5
Q5
Q6
Q8 Q9
Q4Q13
Q10
7
R9
8
COMPARATOR AND OUTPUT STAGE
V
OP2
Q11
R10 R11 R12 R13
+V
6
S
Q14
Q13
REF
R5
R6
Q12
R7
R2
Q21
D2
D3
Z1
Q15
Q16
Q20
Q22
D1
OUTPUT
5
I
REF
4
GND
Q18Q17
R3
R4
Q19
R8
OP3
FULL-WAVE RECTIFIER
PARABOLA NETWORK
CURRENT REFERENCE
3
ABSOL UT E MAXIMU M RATINGS
Symbol Parameter Value Unit
V
s
I
s
P
tot
, TjStorage and Junction Temperature – 25 to 150
T
stg
Supply Voltage 35 V
Supply Current 500 mA
Power Dissipation at T
= 50 °C 500 mW
amb
THERMAL DATA
Symbol Parameter Value Unit
R
th (j–c)
R
th (j–a)
ELECTRICAL CHARACTERISTICS (T
Thermal Resistance Junction-ambient Max. 100
Thermal Resistance Junction-pin 4 Max. 70
= 25oC, VS = 26V, Vfr = 0, S1 and S2 in "a" position, refer
amb
°
°
to the test circuit unless otherwise specified)
Symbol Parameter Test Conditions Min. Typ. Max. Unit
V
V
– I
V
7(A)
V
7(B)
Supply Voltage 17 24 30 V
S
I
Supply Current 4.5 7 mA
S
Internal Reference Voltage 7.6 8.0 8.8 V
ref
Internal Reference Current V
ref
(*)
Pin 7 Output Voltage Ifr = 0 µA 15.3 16.0 16.7 V
(*)
Pin 7 Output Voltage Ifr = 30 µA15V
/R3 0.73 mA
ref
C
°
C/W
C/W
8145-02.EPS
8145-01.TBL
8145-02.TBL
8145-03.TBL
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