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TDA7299
September 2002
s
CAN DELIVER 2W THD 10% 12V/8
s
INTERNAL FIXED GAIN 20dB
s
NO BOUCHEROT CELL
s
THERMAL PROTECTION
s
AC SHORT CIRCUIT PROTECTION
s
SVR CAPACITOR FOR BETTER
RIPPLEREJECTION
s
LOW TURN-ON/OFF POP
s
STAND-BY MODE
DESCRIPTION
The device TDA7299 is a new technology Mono Au-
dio Amplifier in SO package specially designed for
12V sound cards application.
Thanks to the fully complementary output configura-
tion the device delivers a rail voltage swing without
need of boostrap capacitors.
SO8 (4+4)
ORDERING NUMBER: TDA7299
SOUND 2W MONO AMPLIFIER
BLOCK DIAGRAM
IN
SVR
GND
V
S
100
F
V
S
=12V
470
F
OUT
8
0.1
F
47
F
IN
D94AU160A
+
-
TDA7299
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ABSOLUTE MAXIMUM RATINGS
PIN CONNECTION (Top view)
THERMAL DATA
Symbol
Parameter
Value
Unit
V
S
Operating Supply Voltage
18
V
I
O
Output Put Peak Current
1.5
A
T
op
Operating Temperature Range
0 to 70
C
T
j
Junction Temperature
150
C
T
stg
Storage Temperature Range
-40 to 125
C
Symbol
Parameter
Value
Unit
R
th j-amb
Thermal Resistance Junction to ambient (on PCB)
80
C/W
R
th j-case
Thermal Resistance Junction to case
20
C/W
ELECTRICAL CHARACTERISTICS
(T
amb
= 25C; V
S
= 12V; R
L
= 8
; f = 1KHz; unless otherwise specified.)
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
V
S
Supply Voltage Range
4.5
18
V
I
S
Quiescent Current
20
30
mA
I
sb
Stand-By Current
Pin 2 shorted to GND
0.3
mA
V
O
Quiescent Output Voltage
6
V
A
V
Voltage Gain
20
dB
R
IN
Input Impedance
50
100
K
P
O
Output Power
THD = 10%
1.8
2
W
R
L
= 4
, V
S
= 8.5V, THD = 10%
2
W
V
S
OUT
SVR
IN
GND
GND
GND
GND
1
3
2
4
6
5
7
8
D94AU162
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TDA7299
*) Limited by the R
TH
of the package
Figure 1. Application Circuit
APPLICATION HINTS:
For 12V supply and 8
speaker application, its maximum power dissipation is about 1.8W.
Assumming that max ambient temperature is 70C. required thermal resistance of the device and heat dissipat-
ing means must be equal to (150 - 70)/1.8 = 45C/W.
Junction to pin thermal resistance of the package is about 20C/W. That means external heat sink of about
25C/W is required.
Cu ground plane of PCB can be used as heat dissipating means.
Stand-By switches must be able to discharge C
svr
current.
P
ot
Transient Output Power
*)
V
i
= 400mVp, THD < 2%, R
L
= 4
2
W
THD
Distortion
P
O
= 1W
1
%
SVR
Supply Voltage Rejection
V
ripple
= 150mVrms;
F
ripple
= 1KHz
50
dB
E
I
Input Noise Voltage
Rg = 10K
; BW = 20Hz to 20KHz
1.5
5
V
V
sb
Stand-By Enable Voltage
1
V
ELECTRICAL CHARACTERISTICS (continued)
(T
amb
= 25C; V
S
= 12V; R
L
= 8
; f = 1KHz; unless otherwise specified.)
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
IN
SVR
GND
V
S
100
F
V
S
=12V
470
F
OUT
8
0.1
F
47
F
IN
D94AU161A
STAND-BY
IN
SVR
GND
V
S
470
F
OUT
8
0.1
F
47
F
IN
STAND-BY
TDA7299
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Figure 2. On Board Copper Area
Figure 3. P
out
vs Supply Voltage (Rload = 8
)
Figure 4. P
out
vs Supply Voltage (Rload = 4
)
Tj = 108C
Tj = 96C
copper area
2 x 1 cm
Rth j-a = 60C/W
copper area
3 x 3 cm
Rth j-a = 53C/W
Vcc = 12V
Rl = 4 ohm
Pout = 2W
Pd = 1.8W
copper 35um
TDA7299
Tpin = 82C
Tpin = 70C
AUDIO PRECISION remote
vs measured
0.1
1
5
LEVEL(W)
4.500
6.000
7.500
9.000
10.50
12.00
13.50
15.00
16.50
18.00
DMM(Vdc)
Pout(W)
Vs (V)
THD = 10%
THD = 0.1%
Rload= 8 ohm
f = 1KHz
Power dissipation
limited
AUDIO PRECISION remote
vs measured
0.1
1
5
LEVEL(W)
4.500
6.000
7.500
9.000
10.50
12.00
13.50
15.00
16.50
18.00
DMM(Vdc)
Pout(W)
Vs (V)
THD = 10%
THD = 0. 1%
Rload = 4 OHM
f = 1KHz
Current Limiter
Intervention
Power dissipation
limitation
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TDA7299
Figure 5. SVR vs Frequency
AUDIO PRECISION remote
vs measured
-80.00
-75.00
-70.00
-65.00
-60.00
-55.00
-50.00
-45.00
-40.00
-35.00
-30.00
XTALK(dB)
20
100
1k
10k
20k
FREQ(Hz)
S.V.R.(dB)
Frequency (Hz)
Vs = 4.5V
Vs = 9V
Vs = 12V
Vs = 18V
Rload = 4 OHM
C
SVR
= 47uF
Rs = 600OHM
Vrip = 0.5 Vrms
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