ST TDA7496SA User Manual
5W+5W AMPLIFIER WITH DC VOLUME CONTROL
■ 5+5W OUTPUT POWER
R
= 8Ω @THD = 10% VCC = 22V
L
■ ST-BY AND MUTE FUNCTIONS
■ LOW TURN-ON TURN-OFF POP NOISE
■ 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
CONTROL CIRCUIT
■ CLIPWA TT 1 5 P A C KA GE
DESCRIPTION
The TDA7496SA is a stereo 5+5W class AB power
TDA7496SA
PRODUCT PREVIEW
MULTIPOWER BI50II TECHNOLOGY
Clipwatt 15
ORDERING NUMBER: TDA7496SA
amplifier assembled i the @Clipwatt 15 package,
specially designed for high quality sound TV applications.
Features of the TDA7496SA include linear volume
control Stand-by and Mute functions.
The TDA7496SA is pin to pin compatible with
TDA7496, TDA7496S, TDA7496SA, TDA7495,
TDA7495SA, TDA7494S, TDA7494SA.
BLOCK DIAGRAM
VAROUT_R
PW_GND
INR
470nF
INL
470nF
470µF
S_GND
SVR 7
11
1
8
5
VOLUME
VOLUME
30K
VOLUME
34
100nF
VAROUT_L
300K
September 2003
This is preliminary information on a new product now in development. Details are subject to change without notice.
V
S
2
13
+
OP AMP
MUTE/STBY
PROTECTIONS
+
-30K
OP AMP
+5V
60K
D96AU440D
15
14
10
12
9
PW_GND
1000µF
OUTR
STBY
MUTE
OUTL
1000µF
10K
1µF
S1 ST-BY
S2 MUTE
+5V
S_GND
+5V
1/13
TDA7496SA
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value Unit
V
P
T
T
stg,TJ
V
IN
tot
amb
V
DC Supply Voltage 35 V
S
Maximum Input Voltage 8 Vpp
Total Power Dissipation (T
= 70°C) 16 W
amb
Ambient Operating Temperature (1) 0 to 70 °C
Storage and Junction Temperature -40 to 150 °C
Volume Control DC Voltage 7 V
3
PIN CONNECTION
(top view)
D03AU1505
PW_GND
OUTR
V
S
OUTL
PW_GND
MUTE
STBY
S_GND
SVR
N.C.
INL
VAROUT_L
VOLUME
VAROUT_R
INR
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
THERMAL DATA
Symbol Parameter Value Unit
R
th j-case
R
th j-amb
ELECTRICAL CHARACTERISTCS
(Refer to the test circuit R
Symbol Parameter Test Condition Min. Typ. Max. Unit
V
s
I
q
DCV
V
O
P
O
Thermal Resistance junction-case Typ. = 4.5; Max. = 5 °C/W
Thermal Resistance junction-ambient Max. 48 °C/W
= 8Ω, f = 1KHz, Rg = 50Ω, VS = 22V, T
L
Supply Voltage Range 10 32 V
Total Quiescent Current 25 50 mA
Output DC Offset Referred to SVR
os
No Input Signal 200 mV
Potential
Quiescent Output Voltage 11
Output Power THD = 10%; RL = 8Ω;
THD = 1%; RL = 8Ω;
amb
= 25°C)
55.5
4
V
W
2/13
THD
Total Harmonic Distortion
THD = 10%; R
THD = 1%; R
= 4Ω; VS = 12V
L
= 4Ω; VS = 12V
L
Gv = 30dB; PO = 1W; f = 1KHz
2.1
1.0
0.4
W
%
TDA7496SA
ELECTRICAL CHARACTERISTCS
(Refer to the test circuit R
= 8Ω, f = 1KHz, Rg = 50Ω, VS = 22V, T
L
(continued)
amb
= 25°C)
Symbol Parameter Test Condition Min. Typ. Max. Unit
I
peak
V
G
G
VLine
A
Min VOL
Output Peak Current (internally limited) 1.0 1.3 A
Input Signal 2.8 Vrms
IN
Closed Loop Gain V
V
Monitor Out Gain V
Attenuation at Minimum Volume V
>4.5V 28.5 30 31.5 dB
Ol Ctrl
>4.5V; Zload >30KΩ -1.5 0 1.5 dB
Ol Ctrl
<0.5V 80 dB
Ol Ctrl
BW 0.6 MHz
e
Total Output Noise f = 20Hz to 22KHz
N
500 800 µV
PLAY, max volume
f = 20Hz to 22KHz
100 250 µV
PLAY, max attenuation
f = 20Hz to 22KHz MUTE 60 150 µV
SR Slew Rate 5 8
R
Input Resistance 22.5 30 KΩ
i
R
Var Out
R
L Var Out
SVR Supply Voltage Rejection f = 1KHz; max volume
T
T
Variable Output Resistance 30 100 Ω
Variable Output Load 2 KΩ
35 39 dB
C
= 470µF; V
SVR
f = 1KHz; max attenuation
= 470µF; V
C
SVR
Thermal Muting 150 °C
M
Thermal Shut-down 160 °C
S
= 1Vrms
RIP
= 1Vrms
RIP
55 65 dB
MUTE & INPUT SELECTION FUNCTIONS
V
ST-ON
V
ST-OFF
V
MUTEON
V
MUTEOFF
A
MUTE
I
qST-BY
I
stbyBIAS
Stand-by ON Threshold 3.5 V
Stand-by OFF Threshold 1.5 V
Mute ON threshold 3.5 V
Mute OFF threshold 1.5 V
Mute Attenuation 50 65 dB
Quiescent Current @ Stand-by 0.6 1 mA
Stand-by bias current Stand by ON: V
V
= 5V
mute
ST-BY
= 5V;
80 µA
Play or Mute -20 -5 µA
I
muteBIAS
Mute Bias Current Mute 1 5 µA
Play 0.2 2 µA
V/µs
3/13
TDA7496SA
APPLICATION SUGGESTIONS
The recommended values of the external components are those shown on the application circuit of figure 1.
Different values can be used, the following table can help the designer.
COMPONENT
SUGGESTION
VALUE
PURPOSE
R1 300K Volume Control Circuit Larger volume regulation
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
constant
C6 1000µF Output DC decoupling Lower low frequency cutoff Higher low frequency cutoff
C7 1µF Mute time constant 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
LARGER THAN
SUGGESTION
time
Larger volume regulation
time
SMALLER THAN
SUGGESTION
Smaller volume regulation
time
Smaller volume regulation
time
Figure 1. Application Circui
+V
S
INR
INL
C4 470µF
C1
1000µF
PW_GND
C2 470nF
S_GND
C3 470nF
SVR 7
11
1
8
5
30K
VOLUME
C5
100nF
VAROUT_R
VOLUME
VOLUME
34
VAROUT_L
R1 300K
TP1
2
13
+
OP AMP
MUTE/STBY
PROTECTIONS
+
-30K
OP AMP
V
VOL
P1
50K
LOG
C9
0.1µF
S
PW_GND
15
+5V
C8 1000µF
14
9
10
C7
1µF
12
C6 1000µF
R2 10K
PW_GND
OUTR
OUTL
PW_GND
D96AU493D
S1 STBY
S2 MUTE
+5V
S_GND
+5V
4/13
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