VERTICAL DEFLECTION CIRCUIT
September 1993
.
SYNCHRONISATION CIRCUIT
.
ESD PROTECTED
.
PRECISION OSCILLATOR AND RAMP
GENERATOR
.
POWER OUTPUT AMPLIFIER WITH HIGH
CURRENT CAPABILITY
.
FLYBACK GENERATOR
.
VOLTAGE REGULATOR
.
PRECISION BLANKING PULSE GENERATOR
.
THERMAL SHUT DOWN PROTECTION
.
CRT SCREEN PROTECTION CIRCUIT
WHICH BLANKS THE BEAM CURRENT IN
THE EVENT OF LOSS OF VERTICAL DE-
FLECTION CURRENT
TDA1675A
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
Tab connected to Pin 8
FLYBACK
SUPPLY
BLANKING OUTPUT
AMPLIFIER INPUT (-)
AMPLIFIER INPUT (+)
RAMP OUTPUT
RAMP GENERATOR
GROUND
HEIGHT ADJUSTMENT
OSCILLATOR
SYNC. INPUT
OSCILLATOR
OSCILLATOR
AMPLIFIER SUPPLY
AMPLIFIER OUTPUT
16
75
A
-
0
1.
E
P
S
PIN CONNECTIONS (top view)
MULTIWATT 15
(Plastic Package)
ORDER CODE : TDA1675A
DESCRIPTION
The TDA1675A is a monolithic integrated circuit in
15-lead Multiwatt
package. It is a full performance
and very efficient vertical deflection circuit intended
for direct drive of the yoke of 110
o
colour TV picture
tubes. It offers a wide range of applications also in
portable CTVs, B&W TVs, monitors and displays.
1/11
14
+
SYNC.
FLYBACK
GENERATOR
R3
POWER
AMP.
+
-
CLOCK
PULSE
R1
R2
13
2
+
1
11
15
C
f
+V
S
12
R
e
R
a
YO
K
E
R
c
C
c
+
+
R
f
8
9
10
C
a
C
b
R
d
7
HEIGHT
C o
7
3
4
6
BLANKING
OUT
R o
SYNC.
LIN
R
b
Ly
Ry
Iy
OSCILLATOR
VOLTAGE
REGULATOR
BLANK
GENERATOR
AND CRT
PROTECTION
RAMP
GENERATOR
BUFFER
STAGE
THERMAL
PROTECTION
16
75
A
-
0
2
.
E
P
S
BLOCK DIAGRAM
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Value
Unit
V
S
Supply Voltage at Pin 14
35
V
V
1
, V
2
Flyback Peak Voltage
65
V
V
5
Sync. Input Voltage
20
V
V
11
, V
12
Power Amplifier Input Voltage
V
S
- 10
V
V
13
Voltage at Pin 13
V
S
I
O
Output Current (non repetitive) at t = 2ms
3
A
I
O
Output Peak Current at f = 50Hz t > 10
s
2
A
I
O
Output Peak Current at f = 50Hz t
10
s
3.5
A
I
15
Pin 15 Peak-to-peak Flyback Current at f = 50Hz, tfly
1.5ms
3
A
I
15
Pin 15 D.C. Current at V1 < V
14
100
mA
P
tot
Maximum Power Dissipation at T
case
60
o
C
30
W
T
stg
, T
j
Storage and Junction Temperature
- 40, + 150
o
C
16
75
A
-
0
1
.
T
B
L
THERMAL DATA
Symbol
Parameter
Value
Unit
R
TH(j-c)
Thermal Resistance Junction-case
Max.
3
o
C/W
R
TH(j-a)
Thermal Resistance Junction-ambient
Max.
40
o
C/W
16
75
A
-
0
2.
T
B
L
TDA1675A
2/11
DC ELECTRICAL CHARACTERISTICS (V
S
= 35V, T
amb
= 25
o
C, unless otherwise specified)
Symbol
Parameter
Test conditions
Min.
Typ.
Max.
Unit
Fig.
I
2
Pin 2 quiescent current
I
1
= 0
16
36
mA
1b
- I
9
Ramp generator bias current
V
9
= 0
0.02
1
A
1b
- I
9
Ramp generator current
V
9
= 0 ; - I
7
= 20
A
18.5
20
21.5
A
1b
I
9
I
9
Ramp generator non linearity
V
9
= 0 to 15V, - I
7
= 20
A
0.2
1
%
1b
I
14
Pin 14 quiescent current
25
45
mA
1b
V
1
Quiescent output voltage
V
S
= 35V, R
a
= 2.2k
, R
b
= 1k
V
S
= 15V, R
a
= 390
, R
b
= 1k
16.4
6.9
17.8
7.5
19.5
8.1
V
V
1a
V
1L
Output saturation voltage to ground
I
1
= 1.2A,
1
1.4
V
1c
V
1H
Output saturation voltage to supply
- I
1
= 1.2A
1.6
2.2
V
1d
V
4
Oscillator virtual ground
0.45
V
1b
V
7
Regulated voltage at pin 7
- I
7
= 20
A
6.3
6.6
7
V
1b
V
7
V
S
Regulated voltage drift with supply
voltage
V
S
= 15 to 35V
1
2
mV
V
1b
V
11
Amplifier input (+) reference voltage
4.1
4.4
4.7
V
1b
V
13
Blanking output saturation voltage
I
13
= 10 mA
0.35
0.5
V
1a
V
15
Pin 15 saturation voltage to ground
I
15
= 20 mA
1
1.5
V
1a
16
75
A
-
0
3
.
T
B
L
Figure 1 : DC Test Circuit.
22k
12
1
2
9
7
8
10
V
S
I
14
V
11
47k
-I
7
V
-I
9
5
3
75k
I
1
11
I
2
+ I
1
9
4
B
1V
V
4
A
4
V
7
14
1
6
7
5
A-0
4
.
EPS
Figure 1b
1
2
11
8
4
1V
12
5
8V
0.1F
10
V
S
V
1L
+I
1
14
1
6
7
5
A-0
5
.
EPS
Figure 1c
1
2
11
8
4
1V
14
12
5
8V
0.1F
10
V
S
V
1H
-I
1
16
75
A
-
0
6.
E
P
S
Figure 1d
R
a
7
12
13
14
15
1
2
4
5
9
11
8
10
0.1F
I
13
V
S
I
15
V
15
V
13
V
1
R
b
-I
9
1V
8V
16
75
A
-
0
3.
E
P
S
Figure 1a
TDA1675A
3/11
AC ELECTRICAL CHARACTERISTICS
(Refer to A.C. test circuit of fig. 2, T
amb
= 25
o
C, V
S
= 24V, f = 50Hz, unless otherwise specified)
Symbol
Parameter
Test conditions
Min.
Typ.
Max.
Unit
I
S
Supply Current
I
Y
= 2A
PP
295
mA
I
5
Sync Input Current Required to Sync
100
A
V
1
Flyback Voltage
I
y
= 2App
50
V
V
3
Peak-to-peak Oscillator Sawtooth
Voltage
I
5
= 0
I
5
= 100
A
3.6
3.4
V
V
V
10TH(L)
Start Scan Level of the Input Ramp
1.85
V
t
FLY
Flyback Time
Iy = 2App
0.6
ms
t
BLANK
Blanking Pulse Duration
f
o
= 50Hz, T
j
= 75
o
C
f
o
= 60Hz, T
j
= 75
o
C
1.33
1.4
1.17
1.47
ms
ms
f
o
Free Running Frequency
R
o
= 7.5k
, C
o
= 330nF, T
j
= 75
o
C
R
o
= 6.2k
, C
o
= 330nF, T
j
= 75
o
C
42
43.5
52.5
46
Hz
Hz
f
Synchronization Range
I
5
= 100
A, T
j
= 75
o
C
14
16
Hz
T
j
Junction Temperature for Thermal
Shut-down
145
o
C
V
ON
Peak-to-peak Output Noise
35
mV
PP
1
675
A
-
0
4.
T
B
L
2.
2
0.22F
27
0
YOKE
10mH
120
47F
2200F
R
f
1
2
13
14
15
12
7
8
9
10
11
100k
56k
56
0k
180k
220k
HEIGHT
4
6
3
S2
SERVICE
SWITCH
15k
5
BLANKING
OUT
SYNC. IN
1000
F
0.
1
F
+V S
2.4k
1N4001
220F
TDA 1675A
2.4k
1k
LINEARITY
0.1F
C
o
7.
5
k
0.
33F
0.1F
0.1F
IY
5.
9
A
4.
7k
B
4.7k
(FREQ.)
t
blank
100A
t
sync.
V10
V10thL
1/fo
GND
R f
1/fo
Iy
V
3
1/fo
t
blank
S1 (R )
o
0.
82
V1
1/fo
GND
t f Iy
16
75
A
-
0
7.
E
P
S
Figure 2 : AC Test Circuit
TDA1675A
4/11
TYPICAL PERFORMANCE
Symbol
Parameter
Value
Unit
V
S
Minimum supply voltage
25
V
I
S
Supply current
140
mA
t
FLY
Flyback time
0.7
ms
t
BLKG
Banking time
1.4
ms
f
O
Free running frequency
43.5
Hz
* P
TOT
Power dissipation
2.4
W
* R
TH(heatsink)
Thermal resistance of the heatsink
for T
amb
= 60
o
C and T
j max
= 110
o
C
for T
amb
= 60
o
C and T
j max
= 120
o
C
13
16
o
C/W
o
C/W
* Worst case condition.
16
75
A
-
0
5
.
T
B
L
R9
2.2
C7
0.22F
R11
330
YOKE
R8
120
C8
47F
10V
C9
1000F
25V
R10
2%
R12
2.2
5%
*
R1
4.7k
1
2
13
14
15
12
7
8
9
10
11
100k
56k
R6
R5
390k
*
*
*
R4
150k
RT1
HEIGHT
100k
4
6
3
S1
SERVICE
SWITCH
R2
15k
5
0.1F
C1
BLANKING
OUT
SYNC.
PULSE
IN
C2
35V
470F
C3
0.1F
R3
10k
1N4001
D1
220F - 35V
C4
TDA 1675A
2.4k
R7
910
2%
LINEARITY
RT2
C5 0.1F
C
o
7.5k
1%
R o
330nF
5%
C6
0.1F
0.1F
+V
S
16
75
A
-
0
8
.
E
P
S
* The value depends on the characteristics of the CRT. The value shown is indicative only.
Figure 3 : Application Circuit for Small Scree 90
o
CTV Set (R
y
= 15
; L
y
= 30 mH ; I
y
= 0.82 A
PP
)
TDA1675A
5/11
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