Datasheet TDA7265 Datasheet (SGS Thomson Microelectronics)



25 +25W STEREO AMPLIFIER WITH MUTE & ST-BY

WIDE SUPPLY VOLTAGE RANGE (UP TO
±25V ABS MAX.)

SPLIT SUPPLY
HIGHOUTPUTPOWER

25 +25W @ THD =10%, R
NO POPAT TURN-ON/OFF
MUTE(POP FREE)
STAND-BY FEATURE (LOW I
SHORTCIRCUIT PROTECTION
THERMALOVERLOADPROTECTION

DESCRIPTION

The TDA7265 is class AB dual Audio power am­plifier assembled in the Multiwatt package, spe­cially designed for high quality sound application
as Hi-Fi music centers andstereo TV sets.

=8Ω,VS= +20V

L

)

q

TDA7265

Multiwatt11

ORDERING NUMBER: TDA7265

Figure 1: TypicalApplication Circuit

+5V

15K 1µF

µP

1µF

1µF

MUTE/

ST-BY

IN (L)

18K15K

GND

IN (R)

D94AU085

+V

S

1000µF

5
7

-

9

11

-

+

1

1000µF

3

6

-V

S

4+

OUT (L)

18K

IN- (L)8

10 IN- (R)

2

OUT (R)

560Ω

18K

4.7Ω

100nF

4.7Ω

100nF

560Ω

RL (L)

RL (R)

July 1998

1/11

TDA7265

ABSOLUTE MAXIMUM RATINGS

Symbol Parameter Value Unit

V

I

O

P

tot

T

op

T

stg,Tj

PIN CONNECTION (Topview)

DC Supply Voltage ±25 V

S

Output Peak Current (internally limited) 4.5 A
Power Dissipation T

=70°C30W

case

Operating Temperature -20 to 85 °C
Storage and Junction Temperature -40to +150 °C

TAB CONNECTED TO PIN 6

11
10

9
8
7
6
5
4
3
2
1

D95AU316

IN+(1)
IN-(1)
GND
IN-(2)
IN+(2)

-V

S

MUTE
OUTPUT(2)
+V

S

OUTPUT(1)

-V

S

THERMAL DATA

Symbol Description Value Unit

R

th j-case

Thermal Resistance Junction-case Max 2 °C/W

2/11

TDA7265

ELECTRICALCHARACTERISTICS (Refer to the test circuit, VS= + 20V; RL=8Ω;RS=50Ω;

= 30dB;f = 1KHz; T

G

V

Symbol Parameter Test Condition Min. Typ. Max. Unit

V

S

I

q

V

OS

I

b

P

O

P

O

Supply Range +5 +25 V
Total Quiescent Current 80 130 mA
Input Offset Voltage –20 +20 mV
Non Inverting Input BiasCurrent 500 nA
Music Output Power (*) THD = 10%; RL=8Ω;

Output Power THD = 10%

THD Total Harmonic Distortion R

C

T

Cross Talk f = 1KHz

SR Slew Rate 10 V/µs

G

OL

e

N

R

Open Loop Voltage Gain 80 dB
Total Input Noise A Curve

Input Resistance 15 20 K

i

SVR Supply Voltage Rejection

(each channel)

T

j

Thermal Shut-down
Junction Temperature

MUTE FUNCTION [ref: +V

VT

MUTE

A

M

Mute / Play Threshold -7 -6 -5 V
Mute Attenuation 60 70 dB

STAND-BY FUNCTION [ref:+V

VT

ST-BY

A

ST-BY

I

q ST-BY

Note :

(*) FULL POWER up to.V
MUSICPOWER is themaximal powerwhich the amplifieris capable ofproducing across therated load resistance (regardless of nonlinearity)

Stand-by / Mute Threshold -3.5 -2.5 -1.5 V
Stand-by Attenuation 110 dB
Quiescent Current @ Stand-by 3 mA

1 sec after theapplication of a sinusoidalinputsignal offrequency 1K Hz.

=25°C, unless otherwise specified.)

amb

V

= + 22.5V

S

R

=8Ω ;

L

V

+ 16V; RL=4

S

THD = 1%
R

=8Ω ;

L

V

+ 16V; RL=4

S

=8Ω ;PO= 1W; f = 1KHz 0.01 %

L

=8Ω ;

R

L

P

= 0.1 to 15W;

O

f = 100Hzto 15KHz
R

=4Ω;PO= 1W; f = 1KHz 0.02 %

L

=4Ω ;VS+ 16V;

R

L

P

= 0.1 to 12W;

O

f = 100Hzto 15KHz

f = 10KHz

f = 20Hz to 22KHz

fr = 100Hz Vr = 0.5V 60 dB

S]

S]

=±22.5V with RL=8Ωand VS= ±16V with RL=4Ω

S

Ω

Ω

32 W

20 25

25

20
20

70
60

145 °C

0.7 %

1%

3
48

W
W

W
W

dB
dB

µV
µV

Ω

3/11

TDA7265

Figure 2: QuiescentCurrent vs. Supply Voltage

Figure 4: OutputPower vs. SupplyVoltage

Figure3: FrequencyResponse

Figure5: T.H.D.vs. Output Power

Figure 6: OutputPower vs. SupplyVoltage Figure7: T.H.D.vs. Output Power

4/11

TDA7265

Figure 8: QuiescentCurrent vs. Pin # 5 Voltage

Figure 10: SVRvs. Frequency

Figure9: Attenuationvs. Pin # 5 Voltage

Figure11: Crosstalkvs. Frequency

Figure 12: PowerDissipaton vs. Output Power

Figure13: PowerDissipaton vs. Output Power

5/11

TDA7265

MUTE STAND-BY FUNCTION

The pin 5 (MUTE/STAND-BY) controls the ampli­fier status by two different thresholds, referred to
+V

.

S

- When V

higher than = +VS - 2.5V the

pin5

amplifier is in Stand-by mode and the final
stage generatorsare off

Figure 14

+V

S

(V)

20

-V

S

-20

V

IN

(mV)

- when V

is between +VS- 2.5V and +V

pin5

- 6V the final stage currentgenerators are
switched on and the amplifier is in mute
mode

- when V

is lower than +VS- 6V the am-

pin5

plifier is play mode.

t

S

Vpin5

(V)

V

S

VS-2.5

VS-6

VS-10

I

q

(mA)

0

VOUT

(V)

STDBY

OFF

PLAY STDBY PLAY OFF

STDBY

6/11

MUTE MUTE

D94AU086

MUTE

MUTE

Figure 15: Testand ApplicationCircuit (StereoConfiguration)

+V

S

TDA7265

SW1

ST-BY

R1

DZ

SW2

MUTE

R2 C3

Q1

R4

R3

C1

C2

D94AU087B

MUTE/

ST-BY

IN (L)

GND

IN (R)

5
7

-

9

11

-

+

1

C7

-V

+V
3

6

S

S

4+

OUT (L)

IN- (L)8

10 IN- (R)

2

OUT (R)

C6

Figure 16: PCBoard and ComponentsLayout of the figure 15 (1:1 scale)

R5

R6

R8

C4

R10

C9

R9

C5

R7

C8

RL (L)

RL (R)

7/11

TDA7265

APPLICATIONS SUGGESTION

(Demo Board Schematic)
The recommendedvalues of the external compo-

COMPONENTS

R1 10K

R2 15KΩ Mute Circuit V
R3 18KΩ Mute Circuit V

R4 15KΩ Mute Circuit V
R5, R8 18KΩ
R6, R9 560Ω Decrease of Gain

R7, R10 4.7Ω Frequency Stability Danger of Oscillations Danger of Oscillations

C1, C2 1µF

C3 1µF

C4, C6 1000µF

RECOMMENDED

VALUE

Ω

PURPOSE

Mute Circuit

Closed Loop Gain
Setting (*)

Input DC
Decoupling

St-By/Mute Time
Constant

Supply Voltage
Bypass

nents are those shown arethe demo board sche­matic different values can be used: the following
table can help thedesigner.

LARGER THAN

RECOMMENDED VALUE

Increase of Dz
Biasing Current

pin # 5 Shifted Downward Vpin # 5 Shifted Upward
pin # 5 Shifted Upward Vpin # 5 Shifted Downward
pin # 5 Shifted Upward Vpin # 5 Shifted Downward

Increase of Gain

Larger On/Off Time Smaller On/Off Time

SMALLER THAN

RECOMMENDED VALUE

Higher Low Frequency
Cutoff

Danger of Oscillations

C5, C7 0.1µF

C8, C9 0.1µF FrequencyStability

Dz 5.1V Mute Circuit

Q1 BC107 Mute Circuit

(*) Closed loop gain has to be => 25dB

Supply Voltage
Bypass

MUTE, STAND-BY TRUTH TABLE

SW1 SW2

B A STAND-BY
B B STAND-BY
A A MUTE
A B PLAY

Danger of Oscillations

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TDA7265

BRIDGE APPLICATION

Another application suggestion concerns the
BRIDGE configuration,where the two power am­plifiers are connected as shown by the schematic
diagram of figure.17.
This application shows, however, some operative
limits due to dissipation and current capability of
the output stage. For this reason, we reccomend
to usethe TDA7265 in bridge with the supply volt­age equal/lower than ±16V when the load is 8Ω;
with higherloads (i.e.16Ω), theamplifier can work
correctlyin the wholesupplyvoltage range.

Figure 17: BridgeApplicationCircuit

ST-BY/

MUTE

C1

IN

1µF

C2

1µF

D94AU190

7

-

9

11

-

+

1

C5

0.1µF

6

The detected characteristics of T.H.D. vs Pout
and Frequency Response are shown in fig.18 and
fig.19.
With R1=8Ω, Vs=+/-16V the maximum output
powerobtainableis 50Wat T.D.H.=10%.
The quiescent current remains unchanged with
respect to the stereo configuration (~80mA as
typical at Vs=+/-16V).
The last point to take into consideration concerns
the short-circuit protection. As for the stereo appli­cation, the TDA7265is fullyprotected against any
kind of short-circuit ( between Out/Gnd, Out/+Vs
and Out/-Vs).

+V

35

C3

0.1µF

4+

8

10

2

C6

1000µF

C4

1000µF

R5 4.7Ω

R1

36KΩ

R2

560Ω

R4

560Ω

R3

36KΩ

R6

-V

S

4.7Ω

C9

0.1µF

C7

0.1µF

C8

5.6nF

S

RL

Figure 18: Distortionvs. OutputPower

Figure19: FrequencyResponse of the Bridge

Applications

9/11

TDA7265

MULTIWATT11 PACKAGE MECHANICAL DATA

DIM.

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 0.88 0.95 0.035 0.037

G 1.57 1.7 1.83 0.062 0.067 0.072
G1 16.87 17 17.13 0.664 0.669 0.674
H1 19.6 0.772
H2 20.2 0.795

L 21.5 22.3 0.846 0.878
L1 21.4 22.2 0.843 0.874
L2 17.4 18.1 0.685 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 4.1 4.3 4.5 0.161 0.169 0.177

M1 4.88 5.08 5.3 0.192 0.200 0.209

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

MIN. TYP. MAX. MIN. TYP. MAX.

mm inch

10/11

TDA7265

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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.

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