SGS Thomson Microelectronics TDA1675A Datasheet
.
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 DEFLECTION CURRENT
TDA1675A
VERTICAL DEFLECTION CIRC UIT
MULTIWATT 15
(Plastic Package)
DESCRIPTION
The TDA1675A is a monolithic integrated circ uit i n
15-lead Multiwatt
and very efficient vertical def lection circuit intended
for direct drive of the yoke of 1 10
tubes. It offers a wide range of applications also in
portable CTVs, B&W TVs, monitors and displays.
PIN CONNECTIONS (top view)
®
package. It is a full performance
o
colour TV picture
15
14
13
12
11
10
ORDER CODE : TDA1675A
FLYBACK
SUPPLY
BLANKING OUTPUT
AMPLIFIER INPUT (-)
AMPLIFIER INPUT (+)
RAMP OUTPUT
9
8
7
6
5
4
3
2
1
RAMP GENERATOR
GROUND
HEIGHT ADJUSTMENT
OSCILLATOR
SYNC. INPUT
OSCILLATOR
OSCILLATOR
AMPLIFIER SUPPLY
AMPLIFIER OUTPUT
September 1993
Tab connected to Pin 8
1675A-01.EPS
1/11
TDA1675A
BLOCK DIAGRAM
BLANKING
OUT
6
R
o
4
C
o
3
7
SYNC.
+
13 2
BLANK
GENERATOR
AND CRT
PROTECTION
OSCILLATOR
SYNC.
14
VOLTAGE
REGULATOR
RAMP
GENERATOR
BUFFER
STAGE
R3
CLOCK
PULSE
R1 R2
FLYBACK
GENERATOR
+
POWER
AMP.
-
THERMAL
PROTECTION
+V
S
+
C
f
15
11
Ly
Ry
Iy
e
YOKE
12
1
R
R
a
+
R
f
HEIGHT
R
7
9
R
d
10
C
a
LIN
C
b
8
R
b
c
+
C
c
ABSOL UTE MAX IM UM RAT INGS
Symbol Parameter Value Unit
V
S
, V
V
1
V
5
, V
V
11
V
13
I
O
I
O
I
O
I
15
I
15
P
tot
, T
T
stg
Supply Voltage at Pin 14 35 V
Flyback Peak Voltage 65 V
2
Sync. Input Voltage 20 V
Power Amplifier Input Voltage VS - 10 V
12
Voltage at Pin 13 V
S
Output Current (non repetitive) at t = 2ms 3 A
Output Peak Current at f = 50Hz t > 10µs2A
Output Peak Current at f = 50Hz t ≤ 10 µs 3.5 A
Pin 15 Peak-to-peak Flyback Current at f = 50Hz, tfly ≤ 1.5ms 3 A
Pin 15 D.C. Current at V1 < V
Maximum Power Dissipation at T
Storage and Junction Temperature - 40, + 150
j
14
≤ 60oC30W
case
100 mA
1675A-02.EPS
o
C
1675A-01.TBL
THERMAL DATA
Symbol Parameter Value Unit
2/11
R
R
TH(j-c)
TH(j-a)
Thermal Resistance Junction-case
Thermal Resistance Junction-ambient
Max. 3
Max. 40
o
C/W
o
C/W
1675A-02.TBL
TDA1675A
DC ELECTRICAL CHARACTE RIS T ICS (VS = 35V, T
= 25oC, unless otherwise specified)
amb
Symbol Parameter Test conditions Min. Typ. Max. Unit Fig.
I
Pin 2 quiescent current I1 = 0 16 36 mA 1b
2
- I
- I
∆I
I
V
V
V
V
V
∆V
∆V
V
V
V
Ramp generator bias current V9 = 0 0.02 1 µA1b
9
Ramp generator current V9 = 0 ; - I7 = 20µA 18.5 20 21.5 µA1b
9
9
Ramp generator non linearity ∆V9 = 0 to 15V, - I7 = 20µA 0.2 1 % 1b
I
9
Pin 14 quiescent current 25 45 mA 1b
14
Quiescent output voltage VS = 35V, Ra = 2.2kΩ, Rb = 1kΩ
1
Output saturation voltage to ground I1 = 1.2A, 1 1.4 V 1c
1L
Output saturation voltage to supply - I1 = 1.2A 1.6 2.2 V 1d
1H
Oscillator virtual ground 0.45 V 1b
4
Regulated voltage at pin 7 - I7 = 20µA 6.3 6.6 7 V 1b
7
7
Regulated voltage drift with supply
voltage
S
Amplifier input (+) reference voltage 4.1 4.4 4.7 V 1b
11
Blanking output saturation voltage I13 = 10 mA 0.35 0.5 V 1a
13
Pin 15 saturation voltage to ground I15 = 20 mA 1 1.5 V 1a
15
VS = 15V, Ra = 390Ω, Rb = 1kΩ
∆VS = 15 to 35V 1 2
16.4
6.9
17.8
7.5
19.5
8.1VV
mV
V
Figure 1 : DC Test Circuit.
Figure 1a
V
V
13
8V
1V
I
15
S
I
13
13
7
4
59 11 8 10
-I
9
0.1µF
2
14 15
V
15
1
R
a
V
12
R
1
b
Figure 1b
1675A-03.EPS
1V
V
S
V
11
A
B
V
4
75kΩ
I2+ I
1
11
4
4
3
5
V
7
2
97 810
-I
7
I
14
14
I
1
12
-I
9
V
9
1a
1b
1675A-03.TBL
1
22kΩ
47kΩ
1675A-04.EPS
Figure 1c
1V
V
4
12 5
8V
S
14
2
11 8
10
0.1µF
Figure 1d
V
S
14
2
+I
1
1
V
1L
1V
1675A-05.EPS
4
12 5
8V
11 8
10
0.1µF
V
1H
1
-I
1
1675A-06.EPS
3/11
TDA1675A
AC ELECTRICAL CHARACTE RIS TICS
(Refer to A.C. test circuit of fig. 2, T
Symbol Parameter Test conditions Min. Typ. Max. Unit
Supply Current IY = 2A
S
Sync Input Current Required to Sync 100 µA
I
5
Flyback Voltage Iy = 2App 50 V
1
Peak-to-peak Oscillator Sawtooth
3
Voltage
Start Scan Level of the Input Ramp 1.85 V
Flyback Time Iy = 2App 0.6 ms
Blanking Pulse Duration fo = 50Hz, Tj = 75oC
Free Running Frequency Ro = 7.5kΩ, Co = 330nF, Tj = 75oC
f
o
V
10TH(L)
t
t
BLANK
I
V
V
FLY
∆f Synchronization Range I
T
V
Junction Temperature for Thermal
j
Shut-down
Peak-to-peak Output Noise 35 mV
ON
Figure 2 : A C Test Circuit
+V
S
t
4.7k
(FREQ.)
t
blank
Ω
Ω
4.7k
1/fo
100µA
t
sync.
blank
SYNC. IN
Ω
7.5k
A
B
C
V
SERVICE
SWITCH
o
3
BLANKING
OUT
S1 (R )
o
0.33µF
15kΩ
S2
2.4kΩ
13
5
6
4
3
220kΩ
HEIGHT
= 25oC, VS = 24V, f = 50Hz, unless otherwise specified)
amb
PP
I5 = 0
= 100µA
I
5
1.33 1.4
fo = 60Hz, Tj = 75oC
42 43.5
Ro = 6.2kΩ, Co = 330nF, Tj = 75oC
= 100µA, Tj = 75oC1416Hz
5
1N4001 220µF
tfI
y
0.1µF
1000µF
1/fo
GND
1/fo
1
2.2Ω
0.22µF
Ω
V
V
2.4k
120Ω
47µF
10
10thL
12
1kΩ
14 15
2
TDA 1675A
7 8
Ω
180k
9
0.1µF
560kΩ
0.1µF
LINEARITY
1011
0.1µF
100kΩ56kΩ
GND
295 mA
3.6
3.4
1.47 ms
1.17
46 Hz
52.5
145
V
1
I
Y
270Ω
2200µF
Ω
0.82
1/fo
R
f
YOKE
10mH
5.9Ω
V
V
ms
Hz
o
C
PP
1675A-04.TBL
R
I
f
y
1675A-07.EPS
4/11
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