TDA2270.pdf

TDA2270

TV VERTICAL DEFLECTION OUTPUT CIRCUIT

. DRIVES VERTICAL DEFLECTION WIND-

INGS DIRECTLY

. 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

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.

SUPPLY VOLTAGE

FLYBACK

GENERATOR

GND

NON-INVERTING

INPUT

INVERTING INPUT

GND

OUTPUT

OUTPUT STAGE

SUPPLY

GND

REFERENCE

VOLTAGE

BLOCK DIAGRAM

+V S

FLYBACK

GENERATOR

POWER

AMP.

YOKE

REFERENCE

VOLTAGE

THERMAL

PROTECTION

12 13 10

4 5

September 1992

1/7

. HIGH EFFICIENCY

TDA2270

ABSOLUTE MAXIMUM RATINGS

Symbol

Parameter

Value

Unit

V s

Supply Voltage (pin 1)

V 7 ,V 8

Flyback Peak Voltage

V 2

Voltage at Pin 2

+ V s

V 15 ,V 16

Amplifier Input Voltage

+ V s , – 0.5

I o

Output Peak Current (non repetitive, t = 2 ms)

I o

Output Peak Current at f = 50 Hz, t

2.2

I o

Output Peak Current at f = 50 Hz, t > 10

1.2

I 2

Pin 2 DC Current at V 7 <V 1

I 2

Pin 2 Peak to Peak Flyback Current at f = 50 Hz, t fly

1.5 ms

P tot

Total Power Dissipation at

T pins

4.3

T amb =70

T stg ,T j

Storage and Junction Temperature

– 40 to 150

THERMAL DATA

Symbol

Parameter

Value

Unit

R th j–case

Thermal Resistance Junction-case

Max

C/W

R th j–amb

Thermal Resistance Junction–ambient

Max

C/W

* Obtained with the GND pins soldered to printed circuit with minimized copper area.

ELECTRICAL CHARACTERISTICS

(refer to the test circuits, V S =35V, 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

I 8

Pin 8 Quiescent Current

I 2 =0,I 7 =0,V 16 =3V

mA 1a

I 15

Amplifier Input Bias Current

V 15 = 1 V

– 0.1 – 1

I 16

Amplifier Input Bias Current

V 16 = 1 V

– 0.1 – 1

Pin 2 Saturation Voltage to GND

I 2 =20mA

V 7

Quiescent Output Voltage

V s =15V,R a =13k

7.5

V 7L

Output Saturation Voltage to GND

I 7 = 0.7 A

0.7

V 7H

Output Saturation Voltage to Supply

– I 7 = 0.7 A

1.3

1.8

V 9

Reference Voltage

I 9 = 0

2.2

V 9

Reference Voltage Drift versus Supply

Voltage

V s = 15 to 30 V

mV/V 1a

V S

R 9

Reference Voltage Output Resistance

2.1

T j

Junction Temperature for Thermal Shut

Down

140

2/7

V s =35V,R a =39k

TDA2270

Figure 1 : DC Test Circuits

Figure 1a : Measurement of I 1 ;I 8 ;I 15 ;I 16 ;V 9 ;

D V 9 / D V S ;R 9

Figure 1b : Measurement of V 7H

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 , 8 ,I 9 and V 9 ; (b) R 9

Figure 1c : Measurement of V 2L ;V 7L

Figure 1d : Measurement of V 7

S1 : (a) V 2L ; (b) V 7L

3/7

TDA2270

Figure 2 : Application Circuit

Figure 3 : PC Board and Component Layout (1 : 1 scale)

4/7

TDA2270

COMPONENTS LIST FOR TYPICAL APPLICATIONS (refer to the fig. 2)

Component

B/W TV

TVC

Unit

/ 20 mH / 1 App

/ 30 mH / 0.82 App

RT1

5.6

6.8

5.6

330

1.5

1N 4001

–

0.1

C2 el.

470/25 V

C3 el.

220/25 V

0.22

C5 el.

1000/25 V

1000/16 V

C6 el.

10/16 V

TYPICAL PERFORMANCE

Parameter

B/W TV

TVC

Unit

/ 20 mH / 1 App

/30mH

V s – Supply Voltage

I s – Current

145

125

t fly – Flyback Time

0.75

0.7

*P tot – Power Dissipation

1.8

2.05

*R th c– a – Heatsink

C/W

T amb

T j max

130

t o

V i

2.5

Vpp

V 7 – Flyback Voltage

5/7

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