TDA2270
TV VERTICAL DEFLECTION OUTPUT CIRCUIT
September 1992
.
DRIVES VERTICAL DEFLECTION WIND-
INGS DIRECTLY
.
HIGH EFFICIENCY
.
INTERNAL FLYBACK GENERATOR
.
THERMAL PROTECTION
.
ON-CHIP VOLTAGE REFERENCE
.
HIGH OUTPUT CURRENT (2.2 A peak)
.
16-LEAD POWERDIP PLASTIC PACKAGE
DIP16
(Plastic package)
ORDER CODE : TDA2270
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
SUPPLY VOLTAGE
FLYBACK
GENERATOR
NC
GND
OUTPUT
OUTPUT STAGE
SUPPLY
NC
GND
NON-INVERTING
INPUT
INVERTING INPUT
NC
GND
REFERENCE
VOLTAGE
GND
GND
NC
2270-01.EPS
PIN CONNECTIONS
DESCRIPTION
The TDA2270 is a high efficiency monolithic output
stage for vertical deflection circuits in TVs and
monitors. Driving the vertical windings directly, the
device contains a power amplifier, flyback gener-
ator, voltage reference and thermal protection cir-
cuit.
The TDA2270 is supplied in a 16-pin DIP with the
four center pins connected together and used for
heatsinking.
2
8
1
15
16
7
YOKE
+V
S
FLYBACK
GENERATOR
THERMAL
PROTECTION
POWER
AMP.
REFERENCE
VOLTAGE
9
4
5
12 13 10
2270-02.EPS
BLOCK DIAGRAM
1/7
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Value
Unit
V
s
Supply Voltage (pin 1)
35
V
V
7
, V
8
Flyback Peak Voltage
60
V
V
2
Voltage at Pin 2
+ V
s
V
15
, V
16
Amplifier Input Voltage
+ V
s
, 0.5
V
I
o
Output Peak Current (non repetitive, t = 2 ms)
2
A
I
o
Output Peak Current at f = 50 Hz, t
10
s
2.2
A
I
o
Output Peak Current at f = 50 Hz, t > 10
s
1.2
A
I
2
Pin 2 DC Current at V
7
< V
1
50
mA
I
2
Pin 2 Peak to Peak Flyback Current at f = 50 Hz, t
fly
1.5 ms
2
A
P
tot
Total Power Dissipation at
T
pins
90
C
T
amb
= 70
C
4.3
1
W
W
T
stg
, T
j
Storage and Junction Temperature
40 to 150
C
2270-01.TBL
THERMAL DATA
Symbol
Parameter
Value
Unit
R
th jcase
Thermal Resistance Junction-case
Max
14
C/W
R
th jamb
Thermal Resistance Junctionambient
Max
80
C/W
* Obtained with the GND pins soldered to printed circuit with minimized copper area.
2270-02.TBL
ELECTRICAL CHARACTERISTICS
(refer to the test circuits, V
S
= 35 V, T
amb
= 25
o
C unless otherwise specified)
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
Fig.
I
1
Pin 1 Quiescent Current
I
2
= o, I
7
= 0, V
16
= 3 V
8
16
mA
1a
I
8
Pin 8 Quiescent Current
I
2
= 0, I
7
= 0, V
16
= 3 V
16
36
mA
1a
I
15
Amplifier Input Bias Current
V
15
= 1 V
0.1
1
A
1a
I
16
Amplifier Input Bias Current
V
16
= 1 V
0.1
1
A
1a
V
2L
Pin 2 Saturation Voltage to GND
I
2
= 20 mA
1
V
1c
V
7
Quiescent Output Voltage
V
s
= 35 V, R
a
= 39 k
V
s
= 15 V, R
a
= 13 k
18
7.5
V
V
1d
1d
V
7L
Output Saturation Voltage to GND
I
7
= 0.7 A
0.7
1
V
1c
V
7H
Output Saturation Voltage to Supply
I
7
= 0.7 A
1.3
1.8
V
1b
V
9
Reference Voltage
I
9
= 0
2.2
V
1a
V
9
V
S
Reference Voltage Drift versus Supply
Voltage
V
s
= 15 to 30 V
1
2
mV/V
1a
R
9
Reference Voltage Output Resistance
2.1
k
T
j
Junction Temperature for Thermal Shut
Down
140
C
2270-03.TBL
TDA2270
2/7
Figure 1 : DC Test Circuits
2270-03.EPS
S1 : (a) I
15
; (b) I
16
, I
7
and I
8
.
S2 : (a) I
7
and I
8
; (b) I
16
, (c) I
15
.
S3 : (a) I
15
, I
16
, I
7
, I
8
, I
9
and V
9
; (b) R
9
Figure 1a : Measurement of I
1
; I
8
; I
15
; I
16
; V
9
;
V
9
/
V
S
; R
9
2270-04.EPS
Figure 1b : Measurement of V
7H
2270-05.EPS
S1 : (a) V
2L
; (b) V
7L
Figure 1c : Measurement of V
2L
; V
7L
2270-06.EPS
Figure 1d : Measurement of V
7
TDA2270
3/7
PDF 
ZIP
