1/7

TDA7497

April 2002

■

10+10W (RL = 8

Ω

) + 18W ( RL = 4

Ω

) or

10+10+10W ( RL = 8

Ω

)

OUTPUT POWER @THD = 10%, Vcc = 26V

■

INDEPENDENT MUTE FOR CENTER
CHANNEL AND MAIN CHANNELS

■

NO TURN-ON TURN-OFF POP NOISE

■

NO BOUCHEROT CELL

■

SINGLE SUPPLY RANGING UP TO 35V

■

SHORT CIRCUIT PROTECTION

■

THERMAL OVERLOAD PROTECTION

■

INTERNALLY FIXED GAIN

■

SOFT CLIPPING

■

MULTIWATT 15 PACKAGE

DESCRIPTION

The TDA7497 is a triple 10+10+10/18W class AB
power amplifier assembled in the @ Multiwatt 15
package, specially designed for high quality sound,

TV applications.

Features of the TDA7497 include mute functions, in-
dependently controller for main and center channels.

Multiwatt15

ORDERING NUMBER: TDA7497

10W+10W+10W/18W TRIPLE AMPLIFIER

BLOCK DIAGRAM

OP AMP

+

-

MUTE

PROTECTIONS

1

470nF

C1

C11

0.1

µ

F

C2

C3

C4

INR

30K

OP AMP

+

-

30K

C10

0.1

µ

F

C9

1000

µ

F

C8 1000

µ

F

C6 1000

µ

F

C7

1

µ

F

10K R1

10K R2

5

470nF

INL

8

S_GND

14

9

10

12

OUTR

MUTE2

MUTE1

OUTL

11

PW_GND

470

µ

F

SVR

7

D98AU961B

V

S

PW_GND

15

13

S1 MUTE2

(CENTER)

+5V

+V

S

S2 MUTE1

(L/R)

+5V

S_GND

60K

C12 1

µ

F

OP AMP

+

-

30K

1000

µ

F

C5

6

470nF

INC

3

OUTC

4

PW_GND_C

V

S_C

2

MULTIPOWER BI50II TECHNOLOGY

TDA7497

2/7

ABSOLUTE MAXIMUM RATINGS

(1) Operation between -20 to 85

°

C guaranteed by correlation with 0 to 70

°

C.

PIN CONNECTION (Top view)

THERMAL DATA

Symbol

Parameter

Value

Unit

V

S

DC Supply Voltage

35

V

P

tot

Total Power Dissipation (Tamb = 70

°

C)

20

W

T

amb

Ambient Operating Temperature (1)

0 to 70

°

C

T

stg

, T

j

Storage and Junction Temperature

-40 to 150

°

C

Symbol

Parameter

Value

Unit

R

th j-case

Thermal Resistance Junction-case

Typ.=1.3 max = 1.9

°

C/W

R

th j-amb

Thermal Resistance Junction-ambient

max = 35

°

C/W

1

2

3

4

5

6

7

9

10

11

8

PW_GND

MUTE1 (L/R)

MUTE2 (CENTER)

S_GND

SVR

INC

INL

PW_GND_C

OUTC

V

S_C

INR

13

14

15

12

PW_GND

OUTR

V

S

OUTL

D98AU962A

3/7

TDA7497

ELECTRICAL CHARACTERISTCS (Refer to the test circuit V

S

= 26V;

R

L

= 8

Ω,

R

g

= 50

Ω

, T

amb

= 25

°

C)

Symbol

Parameter

Test Condition

Min.

Typ.

Max.

Unit

V

S

Supply Voltage Range

11

32

V

I

q

Total Quiescent Current

60

100

mA

V

O

Quiescent Output Voltage

12

13

14

V

P

O_L/R

Output Power Left /
RightChannels

THD = 10%
THD = 1%;
THD = 10%; RL = 4

Ω

; Vs = 20V

THD = 1%; RL = 4

Ω

; Vs = 20V

THD = 10%; RL = 8

Ω

; Vs = 18V

THD = 1%; RL = 8

Ω

; Vs = 18V

8
6
7
5

3.5
2.2

10

7.5

8
6

3.8
2.9

W
W
W
W
W
W

P

O_C

Output Power Center Channel

THD = 10%
THD = 1%
THD = 10%; RL = 4

Ω

THD = 1%; RL = 4

Ω

8
6

15
11

10

7.5

18
14

W
W
W
W

THD

Total Harmonic Distortion

PO = 1W; f = 1KHz;

0.4

%

I

peak L/R

Output Peak Current

(internally limited)

2.4

A

I

peak C

Output Peak Current Central
Channel

(internally limited)

2.8

A

GV

Closed Loop Gain

28.5

29.5

30.5

dB

∆

GV

L/R Voltage GainMatching

-1

1

dB

BW

0.6

MHz

e

N

Total Output Noise

f = 20Hz to 22KHz

60

150

µ

V

SR

Slew Rate

5

8

V/

µ

s

R

i

Input Resistance

22.5

30

K

Ω

SVR

Supply Voltage Rejection

f = 1kHzCSVR = 470mF; VRIP =
1Vrms

50

60

dB

T

M

Thermal Muting

150

°

C

T

s

Thermal Shut-down

160

°

C

MUTE & INPUT SELECTION FUNCTIONS

V

MUTE1

Mute 1 ON threshold (L/R)

3.5

V

Mute 1 OFF threshold (L/R)

1.5

V

V

MUTE2

Mute 2 ON Threshold (center)

3.5

V

Mute 2 OFF Threshold (center)

1.5

V

A

MUTE

Mute Attenuation

50

65

dB

I

muteBIAS

Mute bias current Mute1/Mute2

Mute

1

5

mA

Play

0.2

2

mA

TDA7497

4/7

Figure 1. PC Boar and Component Layout

5/7

TDA7497

Figure 2. Output Power vs Supply Voltage (L/R)

Figure 3. Output Power vs Supply Voltage

Figure 4. Frequency Response

Figure 5. THD+N vs Output Power

Figure 6. THD+N vs Output Power

Figure 7. Pdiss vs Output Power

0

12

2

4

6

8

10

W

+12

+20

+14

+16

+18

Vdc

TDA7497

Rl =40hm

f =1KHz

THD=10%

THD=1%

0

2

4

6

8

10

W

+10

+26

+12

+14

+16

+18

+20

+22

+24

Vdc

TDA7497

Rl= 80hm

f = 1KHz

THD=10%

THD=1%

Pout vs Vcc : RL=8ohm,F=1KHz (filter 22Hz-22KHz),
THD=1%, 10%, channelsL/R/C

-5

+5l

-4

-3

-2

-1

+0

+1

+2

+3

+4

20

100k

50

100

200

500

1k

2k

5k

10k

20k

50k

Amp. (dB)

Frequency( Hz )

TDA7497

Vcc=26Vdc

Rl= 8ohm

0dB = 1W

Pout(W)

0.01

10

0.02

0.05

0.1

0.2

0.5

1

2

5

100m

10

200m

500m

1

2

5

T.H.D.
(%)

TDA7497

Vcc=20Vdc

Rl =4ohm

f =1KHz

Pout (W)

0.01

10

0.02

0.05

0.1

0.2

0.5

1

2

5

T.H.D. (%)

60m

10

100m

200m

500m

1

2

5

TDA7497

Vcc=26Vdc

Rl = 8ohm

f =1KHz

0

5

10

15

20

25

30

9

10

11

12

13

14

15

16

Pdiss. (W)helv

TDA7497

Vcc= 26V

Right/Left/Center=8ohm

X axisis 3XPout

Pout. (W)

TDA7497

6/7

Multiwatt15 V

DIM.

mm

inch

MIN.

TYP.

MAX.

MIN.

TYP.

MAX.

A

5

0.197

B

2.65

0.104

C

1.6

0.063

D

1

0.039

E

0.49

0.55

0.019

0.022

F

0.66

0.75

0.026

0.030

G

1.02

1.27

1.52

0.040

0.050

0.060

G1

17.53

17.78

18.03

0.690

0.700

0.710

H1

19.6

0.772

H2

20.2

0.795

L

21.9

22.2

22.5

0.862

0.874

0.886

L1

21.7

22.1

22.5

0.854

0.870

0.886

L2

17.65

18.1

0.695

0.713

L3

17.25

17.5

17.75

0.679

0.689

0.699

L4

10.3

10.7

10.9

0.406

0.421

0.429

L7

2.65

2.9

0.104

0.114

M

4.25

4.55

4.85

0.167

0.179

0.191

M1

4.63

5.08

5.53

0.182

0.200

0.218

S

1.9

2.6

0.075

0.102

S1

1.9

2.6

0.075

0.102

Dia1

3.65

3.85

0.144

0.152

OUTLINE AND

MECHANICAL DATA

Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences
of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted
by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject
to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not
authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics.

The ST logo is a registered trademark of STMicroelectronics

2002 STMicroelectronics - All Rights Reserved

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TDA7497