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TDA7497S
April 2003
s
8+8W (RL = 8
) + 15W ( RL = 4
)
OUTPUT POWER @THD = 10%, Vcc = 25V
s
INDEPENDENT MUTE FOR CENTER
CHANNEL AND MAIN CHANNELS
s
NO TURN-ON TURN-OFF POP NOISE
s
NO BOUCHEROT CELL
s
SINGLE SUPPLY RANGING UP TO 35V
s
SHORT CIRCUIT PROTECTION
s
THERMAL OVERLOAD PROTECTION
s
INTERNALLY FIXED GAIN
s
SOFT CLIPPING
s
MULTIWATT 15 PACKAGE
DESCRIPTION
The TDA7497S is a triple 8+8+15W class AB power
amplifier assembled in the @ Multiwatt 15 package,
specially designed for high quality sound, TV applica-
tions.
Features of the TDA7497S include mute functions,
independently controller for main and center chan-
nels.
Multiwatt15
ORDERING NUMBER: TDA7497S
8W+8W+15W TRIPLE AMPLIFIER
BLOCK DIAGRAM
OP AMP
+
-
MUTE
PROTECTIONS
1
470nF
C1
C11
0.1
F
C2
C3
C4
INR
30K
OP AMP
+
-
30K
C10
0.1
F
C9
1000
F
C8 1000
F
C6 1000
F
C7
1
F
10K R1
10K R2
5
470nF
INL
8
S_GND
14
9
10
12
OUTR
MUTE2
MUTE1
OUTL
11
PW_GND
470
F
SVR
7
D98AU961B
V
S
PW_GND
15
13
S1 MUTE2
(CENTER)
+5V
+V
S
S2 MUTE1
(L/R)
+5V
S_GND
60K
C12 1
F
OP AMP
+
-
30K
1000
F
C5
6
470nF
INC
3
OUTC
4
PW_GND_C
V
S_C
2
MULTIPOWER BI50II TECHNOLOGY
TDA7497S
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ABSOLUTE MAXIMUM RATINGS
(1) Operation between -20 to 85 C guaranteed by correlation with 0 to 70C.
PIN CONNECTION (Top view)
THERMAL DATA
Symbol
Parameter
Value
Unit
V
S
DC Supply Voltage
35
V
P
tot
Total Power Dissipation (Tamb = 70C)
20
W
T
amb
Ambient Operating Temperature (1)
0 to 70
C
T
stg
, T
j
Storage and Junction Temperature
-40 to 150
C
Symbol
Parameter
Value
Unit
R
th j-case
Thermal Resistance Junction-case
Typ.=1.3 max = 1.9
C/W
R
th j-amb
Thermal Resistance Junction-ambient
max = 35
C/W
1
2
3
4
5
6
7
9
10
11
8
PW_GND
MUTE1 (L/R)
MUTE2 (CENTER)
S_GND
SVR
INC
INL
PW_GND_C
OUTC
V
S_C
INR
13
14
15
12
PW_GND
OUTR
V
S
OUTL
D98AU962A
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TDA7497S
ELECTRICAL CHARACTERISTCS (Refer to the test circuit V
S
= 25V; R
g
= 50
, T
amb
= 25C)
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
V
S
Supply Voltage Range
11
30
V
I
q
Total Quiescent Current
60
100
mA
V
O
Quiescent Output Voltage
11.5
12.5
13.5
V
P
O_L/R
Output Power Left /
RightChannels
THD = 10%; RL = 8
;
THD = 1%; RL = 8
;
6
5
8
6
W
W
P
O_C
Output Power Center Channel
THD = 10%; RL = 4
THD = 1%; RL = 4
12
10
15
12
W
W
THD
Total Harmonic Distortion
PO = 1W; f = 1KHz;
0.4
%
I
peak L/R
Output Peak Current
(internally limited)
2.0
A
I
peak C
Output Peak Current Central
Channel
(internally limited)
2.5
A
GV
Closed Loop Gain
28.5
29.5
30.5
dB
GV
L/R Voltage GainMatching
-1
1
dB
BW
0.6
MHz
e
N
Total Output Noise
f = 20Hz to 22KHz
60
150
V
SR
Slew Rate
5
8
V/
s
R
i
Input Resistance
22.5
30
K
SVR
Supply Voltage Rejection
f = 1kHz CSVR = 470
F; VRIP =
1Vrms
50
60
dB
T
M
Thermal Muting
150
C
T
s
Thermal Shut-down
160
C
MUTE & INPUT SELECTION FUNCTIONS
V
MUTE1
Mute 1 ON threshold (L/R)
3.5
V
Mute 1 OFF threshold (L/R)
1.5
V
V
MUTE2
Mute 2 ON Threshold (center)
3.5
V
Mute 2 OFF Threshold (center)
1.5
V
A
MUTE
Mute Attenuation
50
65
dB
I
muteBIAS
Mute bias current Mute1/Mute2
Mute
1
5
A
Play
0.2
2
A
TDA7497S
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Figure 1. PC Boar and Component Layout
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TDA7497S
Figure 2. Output Power vs Supply Voltage
Figure 3. Frequency Response
Figure 4. THD+N vs Output Power
Figure 5. Pdiss vs Output Power
0
2
4
6
8
10
W
+10
+12
+14
+16
+18
+20
+22
+24
Vdc
TDA7497
Rl = 80hm
f = 1KHz
THD=10%
THD=1%
Pout vs Vcc : RL=8ohm, F=1KHz (filter 22Hz-22KHz),
THD= 1%, 10%, channels L/R/C
+25
-5
+5l
-4
-3
-2
-1
+0
+1
+2
+3
+4
20
100k
50
100
200
500
1k
2k
5k
10k
20k
50k
Amp.
(dB)
Frequency ( Hz )
TDA7497
Vcc=25 Vdc
Rl = 8ohm
0dB = 1W
T.H.D.
(%)
0.01
10
0.02
0.05
0.1
0.2
0.5
1
2
5
60m
10
100m
200m
500m
1
2
5
TDA7497
Vcc=26Vdc
Rl = 8ohm
f = 1KHz
0
5
10
15
20
25
30
9
10
11
12
13
14
15
16
Pdiss. (W)helv
TDA7497
Vcc = 26V
Right/Left/Center= 8 ohm
X axis is 3X Pout
Pout. (W)
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