SGS Thomson Microelectronics TDA7495 Datasheet

TDA7495

11W+11W AMPLIFIER WITH DC VOLUME CONTROL

11+11W OUTPUT POWER
R

= 8Ω @THD = 10% VCC = 28V

L

ST-BY AND MUTE FUNCTIONS
LOW TURN-ON TURN-OFF POP NOIS E
LINEAR VOLUME CONTROL DC COUPLED

WITH POWER OP. AMP.
NO BOUCHEROT CELL
NO ST-BY RC INPUT NETWORK
SINGLE SUPPLY RANGING UP TO 35V
SHORT CIRCUIT PROTECTION
THERMAL OVERLOAD PROTECTION
INTERNALLY FIXED GAIN
SOFT CLIPPING
VARIABLE OUTPUT AFTER VOLUME CON-

TROL CIRCUIT
MULTIWATT 15 PACKAGE

DESCRIPTION

The TDA7495 is a stereo 11+11W class AB

BLOCK AND APPLICATION DIAGRAM

VAROUT_R

2

PROTECTIONS

VAROUT_L

+

-

MUTE/STBY

+

-

INR

INL

470µF

PW_GND

470nF

S_GND

470nF

SVR

11

1

8

5

7

VOLUME

30K

VOLUME

30K

34

VOLUME

MULTIPOWER BI50II TECHNOLOGY

Multiwatt15

ORDERING NUMBER:

power amplifier assembled in the @ Multiwatt 15
package, specially designed for high quality
sound, TV applications.

Features of the TDA7495 include linear volume
control, Stand-by and mute functions.

V

S

13

OP AMP

60K

OP AMP

+5V

15

14

10

12

9

PW_GND

1000µF

OUTR

STBY

MUTE

OUTL

1000µF

10K

1µF

TDA7495

S1 ST-BY

S2 MUTE

+5V

S_GND

+5V

February 1997

100nF

300K

D96AU440B

1/12

TDA7495

ABSOLUTE MAXIMUM RATINGS

Symbol Parameter Value Unit

V

S

V

IN

P

tot

T

amb

, T

T

stg

V

3

(1) Operation between -20 to 85 °C guaranteed by correlation with 0 to 70°C.

DC Supply Voltage 35 V
Maximum Input Voltage 8 Vpp
Total Power Dissipation (Tamb = 70°C) 20 W
Ambient Operating Temperature (1) -20 to 85 °C
Storage and Junction Temperature -40 to 150 °C

j

Volume CTRL DC voltage 7 V

PIN CONNECTION

(Top view)

15
14
13
12
11
10

PW_GND
OUTR
V

S

OUTL
PW_GND

MUTE
9
8
7
6
5
4
3
2
1

D96AU441B

STBY

S_GND

SVR

N.C.

INL

VAROUT_L

VOLUME

VAROUT_R

INR

THERMAL DATA

Symbol Parameter Value Unit

R

th j-case

R

th j-amb

Thermal Resistance Junction-case Typ. = 2 Max. = 2.8 °C/W
Thermal Resistance Junction-ambient max 35 °C/W

ELECTRICAL CHARACTERISTICS

(Refer to the te s t ci r cui t V

= 20V; RL = 8Ω, Rg = 50Ω, T

S

= 25°C).

amb

Symbol Parameter Test Condition Min. Typ. Max. Unit

V

DCV

S

I

q

Supply Voltage Range 11 35 V
Total Quiescent Current 70 100 mA
Output DC Offset Referred to

OS

No Input Signal -650 650 mV

SVR Potenial

V

O

P

O

Quiescent Output Voltage 10 V
Output Power THD = 10%; RL = 8Ω; VS = 28V 9.5 11 W

THD = 1%; RL = 8Ω; VS = 28V 7.5 8 W
THD = 10%; R

= 4Ω; VCC = 20V 7 8 W

L

THD = 1%; RL = 4Ω; VCC = 20V 5 6 W
THD = 10%; R
THD = 1%; R

= 8Ω; VCC = 18V 3.5 3.8 W

L

= 8Ω; VCC = 18V 2.6 2.9 W

L

2/12

TDA7495

ELECTRICAL CHARACTERISTICS

(continued)

Symbol Parameter Test Condition Min. Typ. Max. Unit

THD Total Harmonic Distortion G

I

peak

V
G

G

vLine

A

Min VOL

in

V

Output Peak Current (internally limited) 1.7 2.4 A
Input Signal 2.8 Vrms
Closed Loop Gain Vol Ctrl > 4.5V 28.5 30 31.5 dB
Monitor Out Gain Vol Ctrl > 4.5V; Zload > 30KΩ -1.5 0 1.5 dB
Attenuation at Minimum Volume Vol Ctrl < 0.5V 80 dB

= 30dB; PO = 1W; f = 1KHz; 0.4 %

V

BW 0.6 MHz

e

N

Total Output Noise f = 20Hz to 22KHz

500 800 µV

Play, max volume
f = 20Hz to 22KHz

100 250 µV

Play, max attenuation
f = 20Hz to 22KHz

60 150 µV

Mute

SR Slew Rate 5 8 V/µs

R

i

R

Var Out

R

load Var Out

SVR Supply Voltage Rejection f = 1kHz; max volume

T

M

T

s

Input Resistance 22.5 30 KΩ
Variable Output Resistance 30 100 Ω
Variable Output Load 2 KΩ

35 39 dB

C

= 470µF; V

SVR

f = 1kHz; max attenuation
C

= 470µF; V

SVR

RIP

RIP

= 1V

=1V

rms

55 65 dB

rms

Thermal Muting 150 °C
Thermal Shut-down 160 °C

MUTE STAND-BY & INPUT SELECTION FUNCTIONS

V

ST-BY

V

MUTE

I

qST-BY

A

MUTE

I

stbyBIAS

Stand-by threshold 2.3 2.5 2.7 V
Mute Threshold 2.3 2.5 2.7 V
Quiescent Current @ Stand-by 0.6 1 mA
Mute Attenuation 50 65 dB
Stand-by bias current Stand by on V

V

ST-BY

MUTE

= 5V

= 5V

80 µA

Play or Mute -20 -5 µA

I

muteBIAS

Mute bias current Mute 1 5 µA

Play 0.2 2 µA

µA

3/12

TDA7495

Figure 1a:

+V

S

INR

INL

C4 470µF

Application Circuit.

C1

1000µF

PW_GND

C2 470nF

S_GND

C3 470nF

SVR

11

1

30K

8

5

30K

7

VOLUME

100nF

VAROUT_R

VOLUME

VOLUME

34

VAROUT_L

C5

R1 300K

2

+

­OP AMP

MUTE/STBY

PROTECTIONS

+

­OP AMP

TP1

C9

0.1µF

V

S

13

VOL

P1

50K

LOG

+5V

15

14

10

12

9

PW_GND

C8 1000µF

C7

1µF

C6 1000µF

R2 10K

PW_GND
OUTR

OUTL
PW_GND

D96AU493B

S1 STBY

S2 MUTE

+5V

S_GND

+5V

Figure 1b:

P.C.B. and Component Layout.

4/12

TDA7495

APPLICATION SUGGES TION S

The recommended values of t he external components are those shown on t he application circuit of fig­ure 1a. Different values can be used, the following table can help the designer.

COMPONENT

SUGGESTION

VALUE

PURPOSE

R1 300K Volume control circuit

LARGER THAN

SUGGESTION

Larger volume regulation
time

SMALLER THAN

SUGGESTION

Smaller volume regulation
time

R2 10K Mute time constant Larger mute on/off time Smaller mute on/off time

P1 50K Volume control circuit

C1 1000µF

Supply voltage
bypass

Danger of oscillation

C2 470nF Input DC decoupling Lower low frequency cutoff Higher low frequency cutoff
C3 470nF Input DC decoupling Lower low frequency cutoff Higher low frequency cutoff
C4 470µF Ripple rejection Better SVR Worse SVR

C5 100nF

Volume control time
costant

Larger volume regulation
time

Smaller volume regulation

time
C6 1000µF Output DC decoupling Lower low frequency cutoff Higher low frequency cutoff
C7 1µF Mute time costant Larger mute on/off time Smaller mute on/off time
C8 1000µF Output DC decoupling Lower low frequency cutoff Higher low frequency cutoff

C9 100nF

Supply voltage
bypass

Danger of oscillation

TYPICAL CHARACTERISTICS:

Refer to the application circuit of f ig.1A T
otherwise specified.

Figure 2:

P

Output Power vs Supply Voltage

OUT

(W)

16
14
12
10

8
6
4
2
0

11 15 19 23 27 31 VS(V)

RL=8Ω

d=10%

D97AU559

d=1%

amb

= 25°C; VS = 20V; RL = 8Ω; F = 1KHz; RS = 50Ω; unless

Figure 3:

Distortion vs Output Power

d

(%)

VS=28V

=8Ω

R

1

0.1

0.01
02468P

L

f=15KHz

f=1KHz

D97AU560

OUT

(W)

5/12

TDA7495

Figure 4:

Figure 6:

Output Power vs Supply Voltage

P

OUT

(W)

14
12
10

8
6
4
2
0

10 12 14 16 18 20 22 24 VS(V)

RL=4Ω

d=10%

d=1%

gain vs Volume Control (pin #3)

Gain

(dB)

30
20
10

0

P

OUT

=1W

-10

-20

-30

-40

-50

-60

-70

-80

0.0 1.0 2.0 3.0 4.0 Vpin#3(V)

D97AU561

D97AU563

Figure 5:

d

(%)

1

0.1

0.01
0246P

Figure 7:

SVR
(dB)

-20

-40

-60

-80

-100
20 100 1K f(Hz)

Distortion vs Output Power

D97AU562

VS=20V
R

=4Ω

L

f=15KHz

f=1KHz

Supply Voltage vs Frequency

V

=1V

RIP

RMS

MAX VOLUME

MAX ATTENUATION

OUT

D97AU564

(W)

Figure 8:

ATT
(dB)

0

-20

-40

-60

-80

-100

-120
0 1 2 3 4 Vpin#9(V)

6/12

Stand-by Attenuation vs Vpin #9

D97AU565

0dB=1W

Figure 9:

ATT
(dB)

0

-20

-40

-60

-80

-100
01234Vpin#10(V)

Mute Attenuation vs V pin #10

D97AU566

0dB=1W

TDA7495

Figure 10:

P

DISS

Power dissipation vs Output Power

(W)

10

RL=2 x 8Ω
f=1KHz

8

6

4

2

0

0.1 1 10 P

VS=14V

VS=28V

VS=24V

VS=18V

D97AU567

OUT

(W)

Figure 11:

P

DISS

Power Dissipation vs Output Power

(W)

RL=2 x 4Ω

16

f=1KHz

12

8

4

0

0.1 1 10P

VS=26V

VS=20V

D97AU568

OUT

(W)

7/12

TDA7495

MUTE STAND-BY TRUTH TABLE

MUTE ST-BY OPERATING CONDITION

H H STANDBY

L H STANDBY

H L MUTE

L L PLAY

Turn ON/OFF Sequences (for optimizing the POP performances)

A) USING MUTE AND STAND-BY FUNCTION S

(V)

V

S

28

ST-BY

pin#9 (V)

5

V

SVR

pin#7(V)

2.5V

MUTE

pin#10 (V)

5

INPUT

(mV)

V

OUT
(V)

I

Q

(mA)

B) USING ONLY THE MUTE FUNCTI ON
To semplify the application, the stand-by pin can

be connected directly to Ground.
During the ON/OFF tr ansitions we recommend to

respect the following conditions:

OFFSTBY MUTE PLAY STBYOFF MUTE

D96AU531A

- At the turn-on the transition mute to play must
be made when the SVR pin is higher than

2.5V

- At the turn-off the TDA7495 must be brought
to mute from the play condition when the SVR
pin is higher than 2.5V.

8/12

TDA7495

PINS:

PIN:

INL, INR

INn

SVR

VOLUME

VOL

30K

10µA

D97AU591

6K

D97AU589

V

S

V

S

500µA

PINS:

VAROUT-L, VAROUT-R

V

PIN:

MUTE

S

VAROUT-L

D97AU590

V

S

200MUTE

10K

50µA

D97AU592

PINS:

PW-GND, S-GND

PIN:

STBY

STBY

GND

65K

200

V

D97AU593

PINS:

OUT R, OUT L

V

S

S

D97AU588

V

S

OUT

10µA

D97AU594

9/12

TDA7495

PIN:

SVR

SVR

1mA

V

V

S

S

V

S

V

S

+

OUT L

-

20K

20K

6K

6K

1K

1K

30K

30K

-

OUT R

+

100µA

D97AU585

10/12

MULTIWATT15 PACKAGE MECHANICAL DATA

TDA7495

DIM.

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

mm inch

11/12

TDA7495

Information furnis hed is believe d to be ac curate and reliabl e. However, SGS-THOMS ON Mi croelect ronics as sumes no res ponsib ility for the
consequences of use of such inform ation nor for any infringem ent of patents or othe r ri ght s of third parties which may result from its use. No
license is granted by implication or otherwise under any patent or patent rights of SGS-THOMSON Microelectronics. Specification mentioned
in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied.
SGS-THOMSON Microelectronics products are not authorized for use as critical components in life support devices or systems without express
written approval of SGS-THOMSON Microelectronics.

© 1997 SGS-THOMSON Microelectronics – Printed in Italy – All Rights Reserved

SGS-THOMSON Microelectronics GROUP OF COMPANIES

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12/12