TDA7499.PDF

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6 + 6W STEREO AMPLIFIER WITH MUTE & ST-BY
TDA7499
6 + 6W STEREO AMPLIFIER WITH MUTE & ST-BY
WIDE SUPPLY VOLTAGE RANGE UP TO
± 18V
6 + 6W @ THD =10%, R L =8
W
,V S = +14V
NO POP AT TURN-ON/OFF
MUTE (POP FREE)
STAND-BY FEATURE (LOW I q )
SHORT CIRCUIT PROTECTION TO GND
THERMAL OVERLOAD PROTECTION
DESCRIPTION
The TDA7499 is class AB dual Audio power am-
plifier assembled in the Multiwatt package, spe-
cially designed for high quality sound application
as Hi-Fi music centers and stereo TV sets.
Multiwatt11
ORDERING NUMBER: TDA7499
Figure 1: Typical Application Circuit
+V S
1000
m
F
15K
1
m
F
MUTE/
ST-BY
5
7
3
IN (L)
+
4
OUT (L)
1 m F
-
18K
IN- (L)
4.7 W
RL (L)
8
100nF
15K
18K
GND
9
560 W
+5V
m P
10
IN- (R)
560
W
18K
1
m
F
-
2
OUT (R)
IN (R)
11
+
4.7 W
1
6
RL (R)
-V S
100nF
D94AU085
1000 m F
May 1997
1/7
11040362.002.png
TDA7499
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Value
Unit
V S
DC Supply Voltage
±
20
V
I O
Output Peak Current (internally limited)
2.5
A
P tot
Power Dissipation T case =70
°
C
23
W
T op
Operating Temperature
0 to 70
°
C
T stg ,T j
Storage and Junction Temperature
-40 to +150
°
C
PIN CONNECTION (Top view)
11
IN+(1)
IN-(1)
GND
IN-(2)
IN+(2)
-V S
MUTE
OUTPUT(2)
+V S
OUTPUT(1)
-V S
10
9
8
7
6
5
4
3
2
1
TAB CONNECTED TO PIN 6
D95AU316
THERMAL DATA
Symbol
Description
Value
Unit
R th j-case
Thermal Resistance Junction-case
Max
2.8
°
C/W
R th j-amb
Thermal Resistance Junction to Ambient
Max
35
°
C/W
Figure 2: Single Supply Application
D1 5.1V
+V S
R1
10K
C1
1 m F
R3
15K
C5
1000 m F
C6
0.1 m F
MUTE/ST-BY
5
7
3
PLAY
5V
Q1
BSX33
IN (L)
C9 470 m F
+
4
OUT (L)
0
MUTE
C3 1 m F
-
R2
15K
R4
30K
R8
4.7
OUT
(L)
W
8
IN- (L)
C7
0.1
C2
100 m F
9
R5
1K
m
F
C4 1
m
F
IN (R)
11
C10 470 m F
+
-
2
IN- (R)
10
OUT (R)
R6
30K
R9
4.7
W
OUT
(R)
C8
0.1
1
6
R7
1K
m
F
GND
D96AU444
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11040362.003.png
TDA7499
ELECTRICAL CHARACTERISTICS (Refer to the test circuit, V S = + 14V; R S =50 W ;
G V = 30dB; f = 1KHz; T amb =25 ° C, unless otherwise specified.)
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
V S
Supply Range
R L =8
W
+5
+18
V
R L =4
W
+5
+13.5
V
I q
Total Quiescent Current
50
90
mA
V OS
Input Offset Voltage
–25
+25
mV
I b
Output Bias Current
500
nA
P O
Output Power
THD = 10%
R L =8
;
V S + 11V; R L =4
W
8
10
7.5
W
W
W
;
V S + 11V; R L =4
W
6
7.5
6
W
W
W
THD
Total Harmonic Distortion
R L =8
W
;P O = 1W; f = 1KHz
0.03
%
;
P O = 0.1 to 5W; V S + 13V;
f = 100Hz to 15KHz
W
0.2
0.5
%
R L =4
W
;P O = 1W; f = 1KHz
0.02
%
;V S + 10V;
P O = 0.1 to 4W;
f = 100Hz to 15KHz
W
0.2
1
%
C T
Cross Talk
f = 1KHz
f = 10KHz
70
60
dB
dB
50
SR
Slew Rate
6.5
10
V/
m
s
G OL
Open Loop Voltage Gain
80
dB
e N
Total Input Noise
A Curve
f = 20Hz to 22KHz
3
4
m
V
8
m
V
R i
Input Resistance
15
20
K
W
SVR
Supply Voltage Rejection
(each channel)
fr = 100Hz
Vr = 0.5V
60
dB
T j
Thermal Shut-down
Junction Temperature
145
°
C
MUTE FUNCTION [ref: +V S ]
VT MUTE
Mute / Play Threshold
-7
-6
-5
V
A M
Mute Attenuation
60
70
dB
STAND-BY FUNCTION [ref: +V S ] (only For Split Supply)
VT ST-BY
Stand-by / Mute Threshold
-3.5
-2.5
-.5
V
A ST-BY
Stand-by Attenuation
110
dB
I q ST-BY
Quiescent Current @ Stand-by
3
6
mA
3/7
THD = 1%
R L =8
R L =8
R L =4
11040362.004.png
TDA7499
MUTE STAND-BY FUNCTION
The pin 5 (MUTE/STAND-BY) controls the ampli-
fier status by two different thresholds, referred to
+V S .
- When V pin5 higher than = +V S - 2.5V the
amplifier is in Stand-by mode and the final
stage generators are off
- when V pin5 is between +V S - 2.5V and +V S
- 6V the final stage current generators are
switched on and the amplifier is in mute
mode
- when V pin5 is lower than +V S - 6V the am-
plifier is play mode.
Figure 3.
+V S
(V)
20
t
-V S
-20
V IN
(mV)
Vpin5
(V)
V S
V S -2.5
V S- 6
V S -10
I q
(mA)
0
VOUT
(V)
OFF
PLAY
STDBY
PLAY
OFF
STDBY
STDBY
MUTE
D94AU086
MUTE
MUTE
MUTE
4/7
11040362.005.png
TDA7499
Figure 4: Test and Application Circuit (Stereo Configuration).
+V S
C4
C5
R2
C3
+V S
MUTE/
ST-BY
5
7
3
R1
IN (L)
+
4
OUT (L)
SW1
C1
-
DZ
R5
IN- (L)
R7
RL (L)
8
C8
R4
R3
GND
9
R6
SW2
10
IN- (R)
R9
R8
C2
-
2
OUT (R)
IN (R)
11
+
R10
1
6
RL (R)
-V S
C9
D94AU087
C7
C6
APPLICATIONS SUGGESTION
(Demo Board Schematic)
The recommended values of the external compo-
nents are those shown are the demo board sche-
matic different values can be used: the following
table can help the designer.
COMPONENTS
RECOMMENDED
VALUE
PURPOSE
LARGER THAN
RECOMMENDED VALUE
SMALLER THAN
RECOMMENDED VALUE
R1
10K
W
Mute Circuit
Increase of Dz
Biasing Current
R2
15K
W
Mute Circuit
V pin # 5 Shifted Downward V pin # 5 Shifted Upward
R3
18K
W
Mute Circuit
V pin # 5 Shifted Upward
V pin # 5 Shifted Downward
R4
15K
W
Mute Circuit
V pin # 5 Shifted Upward
V pin # 5 Shifted Downward
R5, R8
18K
W
Closed Loop Gain
Setting (*)
Increase of Gain
R6, R9
560
W
Decrease of Gain
R7, R10
4.7
W
Frequency Stability Danger of Oscillations
Danger of Oscillations
C1, C2
1
m
F
Input DC
Decoupling
Higher Low Frequency
Cutoff
C3
1
m
F
St-By/Mute Time
Constant
Larger On/Off Time
Smaller On/Off Time
C4, C6
1000
m
F
Supply Voltage
Bypass
Danger of Oscillations
C5, C7
0.1
m
F
Supply Voltage
Bypass
Danger of Oscillations
C8, C9
0.1
m
F
Frequency Stability
Dz
5.1V
Mute Circuit
(*) Closed loop gain has to be => 25dB
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