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
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