TDA7496L
2W+2W AMPLIFIER WITH DC VOLUME CONTROL
2W+2W OUTPUT POWER
R = 8&! @THD = 10% V = 14V
L CC
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 15V
SHORT CIRCUIT PROTECTION
THERMAL OVERLOAD PROTECTION
Powerdip (14+3+3)
INTERNALLY FIXED GAIN
SOFT CLIPPING
ORDERING NUMBER: TDA7496L
VARIABLE OUTPUT AFTER VOLUME CON-
TROL CIRCUIT
POWERDIP (14+3+3) PACKAGE
14+3+3 package, specially designed for high
quality sound, TV and Monitor applications.
DESCRIPTION
Features of the TDA7496L include linear volume
The TDA7496L is a stereo 2W+2W class AB
control, Stand-by and mute functions.
power amplifier assembled in the @ Powerdip
BLOCK DIAGRAM
VAROUT_R VS
7
15,16
GND
1,2,3,13,
18,19,20
VOLUME
9 1000µF
INR + 14
470nF 30K - OUTR
OP AMP
S1 ST-BY
+5V
11 STBY
S_GND
MUTE/STBY
10K
PROTECTIONS
12 MUTE
60K 1µF +5V
VOLUME
S2 MUTE
4
INL + 17 OUTL
470nF 30K -
1000µF
OP AMP
SVR 10
470µF 65
VOLUME
VAROUT_L
+5V
D97AU596A
300K
100nF
April 1998
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TDA7496L
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value Unit
VS DC Supply Voltage 26 V
V Maximum Input Voltage 8 Vpp
IN
P Total Power Dissipation (T = 60°C) 6 W
tot case
Tamb Ambient Operating Temperature 0 to 70 °C
Tstg, Tj Storage and Junction Temperature -40 to 150 °C
V6 Volume CTRL DC voltage 7 V
PIN CONNECTION Rth with "on board" Square Heatsink vs. cop-
per area.
Rthj-a
D97AU675
(ÚC/W)
GND 1 20 GND
COPPER AREA 35µ
THICKNESS
GND 2 19 GND
GND 3 18 GND
60
INL 4 17 OUTL
VAROUT_L 5 16 VS
PC BOARD
VOLUME 6 15 VS
50
VAROUT_R 7 14 OUTR
N.C. 8 13 GND
40
INR 9 12 MUTE
SVR 10 11 STBY
D97AU597A
30
0 4 8 12 Area(cm2)
THERMAL DATA
Symbol Parameter Value Unit
Rth j-pins
Thermal Resistance Junction-pins max. 15 °C/W
Rth j-amb
(*) Thermal Resistance Junction-ambient max. 50 °C/W
(*) Mounted on PCB with no heatsink
ELECTRICAL CHARACTERISTICS (Refer to the test circuit V = 14V; R = 8&!, R = 50&!, T = 25°C).
S L g amb
Symbol Parameter Test Condition Min. Typ. Max. Unit
VS Supply Voltage Range 10 18 V
Iq Total Quiescent Current 25 50 mA
DCVOS Output DC Offset Referred to No Input Signal 200 mV
SVR Potenial
VO Quiescent Output Voltage 7 V
PO Output Power THD = 10%; RL = 8&!; 1.6 2 W
THD = 1%; R = 8&!; 1.3 W
L
THD Total Harmonic Distortion GV = 30dB; PO = 1W; f = 1KHz; 0.4 %
Ipeak Output Peak Current (internally limited) 0.7 0.9 A
Vin Input Signal 2.8 Vrms
GV Closed Loop Gain Vol Ctrl > 4.5V 28.5 30 31.5 dB
GvLine Monitor Out Gain Vol Ctrl > 4.5V; Zload > 30K&! -1.5 0 1.5 dB
AMin VOL Attenuation at Minimum Volume Vol Ctrl < 0.5V 80 dB
BW 0.6 MHz
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TDA7496L
ELECTRICAL CHARACTERISTICS (continued)
Symbol Parameter Test Condition Min. Typ. Max. Unit
eN 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
Ri Input Resistance 22.5 30 K&!
RVar Out Variable Output Resistance 30 100 &!
Rload Var Out Variable Output Load 2 K&!
SVR Supply Voltage Rejection f = 1kHz; max volume 35 39 dB
CSVR = 470µF; VRIP = 1Vrms
f = 1kHz; max attenuation 55 65 dB
CSVR = 470µF; VRIP =1Vrms
T Thermal Muting 150 °C
M
Ts Thermal Shut-down 160 °C
MUTE STAND-BY & INPUT SELECTION FUNCTIONS
VST ON Stand-by ON Threshold 3.5 V
VST OFF Stand-by OFF Threshold 1.5 V
VM ON Mute ON Threshold 3.5 V
VM OFF Mute OFF Threshold 1.5 V
IqST-BY Quiescent Current @ Stand-by 0.6 1 mA
AMUTE Mute Attenuation 50 65 dB
IstbyBIAS Stand-by bias current Stand by on VST-BY = 5V 80 µA
VMUTE = 5V µA
Play or Mute -20 -5 µA
Mute bias current Mute 1 5 µA
ImuteBIAS
Play 0.2 2 µA
APPLICATION SUGGESTIONS
The recommended values of the external components are those shown on the application circuit of fig-
ure 1A. Different values can be used, the following table can help the designer.
SUGGESTION LARGER THAN SMALLER THAN
COMPONENT PURPOSE
VALUE SUGGESTION SUGGESTION
R1 300K Volume control Larger volume regulation Smaller volume regulation
circuit time 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 Danger of oscillation
bypass
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 Larger volume regulation Smaller volume regulation
costant time time
C6 1000µF Output DC Lower low frequency cutoff Higher low frequency cutoff
decoupling
C7 1µF Mute time costant Larger mute on/off time Smaller mute on/off time
C8 1000µF Output DC Lower low frequency cutoff Higher low frequency cutoff
decoupling
C9 100nF Supply voltage Danger of oscillation
bypass
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TDA7496L
Figure 1A. Application Circuit.
+VS
C1 C9
1000µF 0.1µF
VAROUT_R VS
7
15,16
PW_GND 1,2,3,13,
18,19,20
VOLUME
9 C8 1000µF PW_GND
INR + 14
OUTR
C2 470nF 30K -
OP AMP
S1 STBY
+5V
11
MUTE/STBY S_GND
R2 10K
12
PROTECTIONS
C7
VOLUME 60K +5V
1µF S2 MUTE
4
INL + 17
OUTL
C3 470nF 30K -
C6 1000µF PW_GND
OP AMP
SVR 10
C4 470µF 65
VOLUME
VAROUT_L
+5V D97AU598A
VOL
P1
R1 300K
50K
C5
LOG
100nF
TP1
Figure 1B. PCB and Component Layout of the Fig. 1A (1.25:1 scale)
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TDA7496L
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 FUNCTIONS
VS (V)
ST-BY
pin#11 (V)
5
VSVR
pin#10(V)
2.5V
MUTE
pin#12 (V)
5
INPUT
(mV)
VOUT
(V)
OFF STBY MUTE PLAY MUTE STBY OFF
IQ
(mA)
D97AU683
B) USING ONLY THE MUTE FUNCTION - At the turn-on, the transition mute - play must be
made when the SVR pin is higher than 2.5V
To simplify the application, the stand-by pin can
be connected directly to Ground. - At the turn-off, the TDA7496L must be brought
to mute from the play condition when the SVR pin
During the ON/OFF transitions is recommend to
is higher than 2.5V.
respect the following conditions.
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TDA7496L
Quiescent current vs. Supply Voltage Output DC Voltage vs. Supply Voltage
Iq (mA) Vodc (V)
34 10
9.5
32
9
30
Vi=0 8.5 Vi=0
28 8
7.5
26
7
24
6.5
22 6
5.5
20
5
18
4.5
16 4
10 11 12 13 14 15 16 17 18 10 11 12 13 14 15 16 17 18
Supply Voltage (V) Supply Voltage (V)
Output Power vs. Supply Voltage
Output DC Offset vs. Supply Voltage
Ouput Power (W)
Vodc-Vsvr (V)
300 4
280
3.5
THD=10 %
260
Vi=0 3
Rl=8 Ohm
240
F= 1 KHz
2.5
220
2
200
180
1.5
THD=1 %
160
1
140
0.5
120
0
100
10 11 12 13 14 15 16 17 18
10 11 12 13 14 15 16 17 18
Supply Voltage (V) Supply Voltage (V)
Distortion vs. Output Power Closed Loop gain vs. Frequency
Distortion (%) Closed Loop Gain (dB)
10 32
31
Vs=12V
30
Rl=8 Ohm
29
1 28
F=15 KHz
Rl=8 Ohm
27
Pout=0.5W
26
Cin=470nF
25
Cout =1000uF
0.1 24 Csvr=470 uF
23
22
F=1 KHz
21
0.01 20
0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 0.02 0.2 2 20
Output Power (W) Frequency (KHz)
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TDA7496L
St-By Attenuation vs. Vpin 11 Mute Attenuation vs. Vpin 12
Mute Attenuation (dB)
Stand-by Attenuation (dB)
20
20
10
10
0 0
-10
-10
-20
-20
-30
-30
Rl=8 Ohm
-40
Rl=8 Ohm
-40
-50
0 dB @ Pout=1W
0 dB @ Pout=1W
-50
-60
-70 -60
-80 -70
-90
-80
-100
-90
-110
-100
-120
-110
-130
-120
-140
0 0.4 0.8 1.2 1.6 2 2.4 2.8 3.2 3.6 4 4.4 4.8 5.2
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5
Vpin # 12 (V)
Vpin # 11 (V)
PIN DESCRIPTION
PIN: SVR
VS VS VS
OUT L
+
-
30K
20K 6K 1K
SVR
20K 6K 1K
30K
-
OUT R
+
100µA
D97AU585A
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TDA7496L
PINS: INL, INR
PINS: VAROUT-L, VAROUT-R
VS
VS
500µA
6K
VAROUT-L
INn
30K
D97AU590
D97AU589
SVR
PIN: VOLUME
PIN: MUTE
VS
VS
10µA
MUTE 200 10K
VOL
50µA
D97AU592
D97AU591
PINS: PW-GND, S-GND
PINS: OUT R, OUT L
VS
VS
OUT
GND
D97AU593
D97AU588
PIN: STBY
VS
10µA
STBY 200
65K
D97AU594
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TDA7496L
POWERDIP20 PACKAGE MECHANICAL DATA
mm inch
DIM.
MIN. TYP. MAX. MIN. TYP. MAX.
a1 0.51 0.020
B 0.85 1.40 0.033 0.055
b 0.50 0.020
b1 0.38 0.50 0.015 0.020
D 24.80 0.976
E 8.80 0.346
e 2.54 0.100
e3 22.86 0.900
F 7.10 0.280
I 5.10 0.201
L 3.30 0.130
Z 1.27 0.050
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TDA7496L
Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics 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 SGS-THOMSON Microelectronics. Specification men-
tioned 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 ex-
press written approval of SGS-THOMSON Microelectronics.
© 1998 SGS-THOMSON Microelectronics  Printed in Italy  All Rights Reserved
SGS-THOMSON Microelectronics GROUP OF COMPANIES
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10/10
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