STMICROELECTRONICS TDA7496L

TDA7496L
2W+2W AMPLIFIER WITH DC VOLUME CONTROL
2W+2W OUTPUT POWER
RL = 8Ω @THD = 10% VCC = 14V
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
INTERNALLY FIXED GAIN
SOFT CLIPPING
VARIABLE OUTPUT AFTER VOLUME CONTROL CIRCUIT
POWERDIP (14+3+3) PACKAGE
Powerdip (14+3+3)
ORDERING NUMBER: TDA7496L
14+3+3 package, specially designed for high
quality sound, TV and Monitor applications.
Features of the TDA7496L include linear volume
control, Stand-by and mute functions.
DESCRIPTION
The TDA7496L is a stereo 2W+2W class AB
power amplifier assembled in the @ Powerdip
BLOCK DIAGRAM
VAROUT_R
GND
1,2,3,13,
18,19,20
470nF
15,16
VOLUME
9
INR
VS
7
30K
1000µF
14
+
OUTR
OP AMP
S1 ST-BY
11
+5V
STBY
MUTE/STBY
PROTECTIONS
60K
VOLUME
470nF
12
MUTE
+
30K
17
+5V
1µF
OUTL
-
1000µF
OP AMP
SVR
S_GND
S2 MUTE
4
INL
10K
10
470µF
6
VOLUME
5
VAROUT_L
+5V
D97AU596A
100nF
April 1998
300K
1/10
TDA7496L
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
VS
VIN
Ptot
Tamb
Value
DC Supply Voltage
26
V
Maximum Input Voltage
Total Power Dissipation (Tcase = 60°C)
8
6
Vpp
W
0 to 70
°C
-40 to 150
°C
7
V
Ambient Operating Temperature
Tstg, Tj
Storage and Junction Temperature
Volume CTRL DC voltage
V6
Unit
PIN CONNECTION
Rth with "on board" Square Heatsink vs. copper area.
Rthj-a
(˚C/W)
GND
1
20
GND
GND
2
19
GND
GND
3
18
GND
INL
4
17
OUTL
VAROUT_L
5
16
VS
VOLUME
6
15
VS
VAROUT_R
7
14
OUTR
N.C.
8
13
GND
INR
9
12
MUTE
SVR
10
11
STBY
D97AU675
COPPER AREA 35µ
THICKNESS
60
PC BOARD
50
40
D97AU597A
30
0
4
8
12
Area(cm2)
THERMAL DATA
Symbol
Rth j-pins
Rth j-amb (*)
Value
Unit
Thermal Resistance Junction-pins
Parameter
max.
15
°C/W
Thermal Resistance Junction-ambient
max.
50
°C/W
(*) Mounted on PCB with no heatsink
ELECTRICAL CHARACTERISTICS (Refer to the test circuit VS = 14V; RL = 8Ω, Rg = 50Ω, Tamb = 25°C).
Symbol
VS
Iq
DCVOS
VO
PO
THD
Ipeak
Vin
GV
GvLine
AMin VOL
BW
2/10
Parameter
Supply Voltage Range
Total Quiescent Current
Output DC Offset Referred to
SVR Potenial
Quiescent Output Voltage
Output Power
Total Harmonic Distortion
Output Peak Current
Input Signal
Closed Loop Gain
Monitor Out Gain
Attenuation at Minimum Volume
Test Condition
Min.
10
Typ.
25
200
No Input Signal
Max.
18
50
7
2
1.3
THD = 10%; RL = 8Ω;
THD = 1%; RL = 8Ω;
GV = 30dB; PO = 1W; f = 1KHz;
(internally limited)
1.6
0.7
0.9
Vol Ctrl > 4.5V
Vol Ctrl > 4.5V; Zload > 30KΩ
Vol Ctrl < 0.5V
28.5
-1.5
80
30
0
0.4
0.6
2.8
31.5
1.5
Unit
V
mA
mV
V
W
W
%
A
Vrms
dB
dB
dB
MHz
TDA7496L
ELECTRICAL CHARACTERISTICS (continued)
Symbol
eN
SR
Ri
RVar Out
Rload Var Out
SVR
TM
Ts
Parameter
Total Output Noise
Test Condition
f = 20Hz to 22KHz
Play, max volume
f = 20Hz to 22KHz
Play, max attenuation
f = 20Hz to 22KHz
Mute
Slew Rate
Input Resistance
Variable Output Resistance
Variable Output Load
Supply Voltage Rejection
Min.
5
22.5
f = 1kHz; max volume
CSVR = 470µF; VRIP = 1Vrms
f = 1kHz; max attenuation
CSVR = 470µF; VRIP =1Vrms
Typ.
500
Max.
800
Unit
µV
100
250
µV
60
150
µV
100
2
35
39
V/µs
KΩ
Ω
KΩ
dB
55
65
dB
150
160
°C
°C
Thermal Muting
Thermal Shut-down
8
30
30
MUTE STAND-BY & INPUT SELECTION FUNCTIONS
VST ON
VST OFF
VM ON
VM OFF
IqST-BY
AMUTE
IstbyBIAS
ImuteBIAS
Stand-by ON Threshold
Stand-by OFF Threshold
Mute ON Threshold
Mute OFF Threshold
Quiescent Current @ Stand-by
Mute Attenuation
Stand-by bias current
Mute bias current
3.5
1.5
3.5
50
Stand by on VST-BY = 5V
VMUTE = 5V
Play or Mute
Mute
Play
-20
0.6
65
80
-5
1
0.2
1.5
1
5
2
V
V
V
V
mA
dB
µA
µA
µA
µA
µA
APPLICATION SUGGESTIONS
The recommended values of the external components are those shown on the application circuit of figure 1A. Different values can be used, the following table can help the designer.
R1
SUGGESTION
VALUE
300K
R2
P1
10K
50K
C1
1000µF
C2
C3
C4
C5
470nF
470nF
470µF
100nF
C6
1000µF
C7
C8
1µF
1000µF
C9
100nF
COMPONENT
PURPOSE
Volume control
circuit
Mute time constant
Volume control
circuit
Supply voltage
bypass
Input DC decoupling
Input DC decoupling
Ripple rejection
Volume control time
costant
Output DC
decoupling
Mute time costant
Output DC
decoupling
Supply voltage
bypass
LARGER THAN
SUGGESTION
Larger volume regulation
time
Larger mute on/off time
SMALLER THAN
SUGGESTION
Smaller volume regulation
time
Smaller mute on/off time
Danger of oscillation
Lower low frequency cutoff
Lower low frequency cutoff
Better SVR
Larger volume regulation
time
Lower low frequency cutoff
Higher low frequency cutoff
Higher low frequency cutoff
Worse SVR
Smaller volume regulation
time
Higher low frequency cutoff
Larger mute on/off time
Lower low frequency cutoff
Smaller mute on/off time
Higher low frequency cutoff
Danger of oscillation
3/10
TDA7496L
Figure 1A. Application Circuit.
+VS
C1
1000µF
C9
0.1µF
VS
VAROUT_R
PW_GND
7
1,2,3,13,
18,19,20
VOLUME
9
INR
C2 470nF
15,16
30K
C8 1000µF
14
+
PW_GND
OUTR
OP AMP
S1 STBY
11
MUTE/STBY
PROTECTIONS
INL
C3 470nF
C7
1µF
60K
VOLUME
4
+
30K
OUTL
C6 1000µF
PW_GND
10
C4 470µF
6
VOLUME
C5
100nF
5
VAROUT_L
R1 300K
TP1
VOL
P1
50K
LOG
+5V
Figure 1B. PCB and Component Layout of the Fig. 1A (1.25:1 scale)
4/10
S2 MUTE
17
OP AMP
SVR
S_GND
R2 10K
12
+5V
D97AU598A
+5V
TDA7496L
MUTE STAND-BY TRUTH TABLE
MUTE
ST-BY
OPERATING CONDITION
H
L
H
H
STANDBY
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
To simplify the application, the stand-by pin can
be connected directly to Ground.
During the ON/OFF transitions is recommend to
respect the following conditions.
- At the turn-on, the transition mute - play must be
made when the SVR pin is higher than 2.5V
- At the turn-off, the TDA7496L must be brought
to mute from the play condition when the SVR pin
is higher than 2.5V.
5/10
TDA7496L
Output DC Voltage vs. Supply Voltage
Quiescent current vs. Supply Voltage
34
Iq (mA)
10
Vodc (V)
9.5
32
9
30
Vi=0
Vi=0
8.5
8
28
7.5
26
7
24
6.5
6
22
5.5
20
5
18
4.5
4
16
10
11
12
13
14
15
16
17
18
10
11
12
13
15
16
17
18
Output Power vs. Supply Voltage
Output DC Offset vs. Supply Voltage
300
14
Supply Voltage (V)
Supply Voltage (V)
Vodc-Vsvr (V)
Ouput Power (W)
4
280
3.5
THD=10 %
260
Vi=0
3
Rl=8 Ohm
F= 1 KHz
240
2.5
220
200
2
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
Distortion vs. Output Power
10
14
15
16
17
18
Supply Voltage (V)
Supply Voltage (V)
Closed Loop gain vs. Frequency
Distortion (%)
32
Closed Loop Gain (dB)
31
Vs=12V
Rl=8 Ohm
30
29
1
28
F=15 KHz
Rl=8 Ohm
Pout=0.5W
Cin=470nF
Cout =1000uF
Csvr=470 uF
27
26
25
0.1
24
23
22
F=1 KHz
0.01
0
0.2
0.4
21
0.6
0.8
1
1.2
Output Power (W)
6/10
1.4
1.6
1.8
2
20
0.02
0.2
2
Frequency (KHz)
20
TDA7496L
St-By Attenuation vs. Vpin 11
20
10
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
-110
-120
-130
-140
Mute Attenuation vs. Vpin 12
Stand-by Attenuation (dB)
20
10
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
-110
-120
Rl=8 Ohm
0 dB @ Pout=1W
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
Mute Attenuation (dB)
Rl=8 Ohm
0 dB @ Pout=1W
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
Vpin # 12 (V)
Vpin # 11 (V)
PIN DESCRIPTION
PIN: SVR
VS
VS
VS
OUT L
+
-
20K
6K
1K
20K
6K
1K
30K
SVR
30K
-
OUT R
+
100µA
D97AU585A
7/10
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
8/10
TDA7496L
POWERDIP20 PACKAGE MECHANICAL DATA
mm
DIM.
MIN.
a1
0.51
B
0.85
b
b1
TYP.
inch
MAX.
MIN.
TYP.
MAX.
0.020
1.40
0.033
0.50
0.38
0.020
0.50
D
0.055
0.015
0.020
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
Z
3.30
0.130
1.27
0.050
9/10
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 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.
© 1998 SGS-THOMSON Microelectronics – Printed in Italy – All Rights Reserved
SGS-THOMSON Microelectronics GROUP OF COMPANIES
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