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TDA7297D
May 2004
1FEATURES
■TECHNOLOG Y BI20II
■WIDE SUPPL Y VOLTAGE RAN GE (6 .5 - 18V)
■OUTPUT POWER 10+10W @ THD = 10%,
RL = 8Ω, VCC = 13V
■MINIMUM EXTERNAL COMPONENTS
– NO SVR CAPACIT O R
– N O B OOTSTR AP
– NO BOUCHEROT CELLS
– INTERNALLY FIXED GAIN
■STAND-BY & MUTE FUNCTIONS
■SHORT CIRCUIT PROTECTION
■THER MAL OVERLOAD PROT EC T IONE 2DESCRIPTION
The TDA7297D is a dual bridge amplifier specially
designed for Home Audio, Plasma TV, LCD TV appli-
cations.
10W+10W DUAL BRIDGE AMPLIFIER
Figure 2. TEST AND APPLICATION C IRCUIT
2
5
7
Vref
ST-BY
JP1
9
IN1
C3 0.22µF
V
CC
156
D02AU1407
+
-
-
+
OUT1+
OUT1-
19
16
14
MUTE 8
IN2
C5 0.22µF
+
-
-
+
OUT2+
OUT2-
20
13
S-GND
PW-GND
C1
470µFC2
100nF C7
100n
F
1
10
11
C4
10µF
R1
47K
R2
47K
C6
1µF
R3 10K
R4 10K
+5V
REV. 1
Figure 1. Package
T
able 1. Order Codes
Part Number Package
TDA7297D PowerSO20 (SLUG UP)
PowerSO20 (SLUG UP)
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Table 2. Absolute Maximum Ratings
Table 3. Thermal Data
Figure 3. PIN CONNECTION
Symbol Parameter Value Unit
VsSupply Voltage 20 V
IOOutput Peak Current (internally limited) 2 A
Ptot Total Power Dissipation (Tamb = 70°C 33 W
Top Operating Temperature 0 to 70 °C
Tstg, TjStorage and Junction Temperature -40 to 150 °C
Symbol Parameter Value Unit
Rth j-case Thermal Resistance Junction-case 2.1 °C/W
PW GN
D
ST BYN.C.
N.C.
N.C.
VCC
OUT1-
IN1
MUTE
OUT1+
PW GN
D
10
8
9
7
6
5
4
3
2
13
14
15
16
17
19
18
20
12
1
11
P
W GND
D02AU1408
SGND
IN2-
OUT2-
VCC
N.C.
N.C.
OUT2+
P
W GND
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TDA7297D
Table 4. Electrical Characteristcs (VCC = 13V, RL = 8Ω, f = 1KHz, Tamb = 25°C unless otherwise
specified)
3 APPLICATIVE SUGGESTIONS
STAND-BY AND MUTE FUNCTIONS
3.1 Microprocessor Application
In order to av oid annoying "Pop-Noi se" during T urn-On/Off transients, it is necessary to guarantee the right St-
by and m u te signals sequence.It is quite simpl e to obtain this function using a microprocessor (Fig. 4 and 5).
At first St-by signal (from
µ
P) goes high and the voltage across the St-by terminal (Pin 9) starts to increase ex-
ponentiall y. The external RC network is i ntended to turn-on sl owly the bias ing circuit s of the amplifi er, this to
avoid "POP " and "CLIC K" on the outputs.
When this voltage reac hes the St-by threshold level, the amplifier is switched-on and the ex ternal capacitors in
series to the inp ut terminals (C1, C3) start to charge.
It's necessary to mantain the mute signal low until the capacitors are fully charged, this to avoid that the device
goes in play mode causing a loud "Pop Noise" on the speakers.
A delay of 100-200ms between S t-by and mute signals is suitable for a p roper operation.
Symbol Parameter Test Condition Min. Typ. Max. Unit
VCC Supply Range 6.5 18 V
IqTotal Quiescent Current RL = ∞50 65 mA
VOS Output Offset Voltage 120 mV
POOutput Power THD 10% 8.3 10 W
THD Total Harmonic Distortion PO = 1W 0.1 0.3 %
PO = 0.1W to 5W
f = 100Hz to 15KHz 1%
SVR Supply Voltage Rejection f = 100Hz, VR =0.5V 40 56 dB
CT Crosstalk 46 60 dB
AMUTE Mute Attenuation 60 80 dB
TwThermal Threshold 150 °C
GVClosed Loop Voltage Gain 31 32 33 dB
∆GVVoltage Gain Matching 0.5 dB
RiInput Resis tance 25 30 KΩ
VTMUTE Mute Threshold Vo = -30dB 2.3 2.9 4.1 V
VTST-BY St-by Threshold 0.8 1.3 1.8 V
IST-BY St-by Current 100 µA
eNTotal Output Noise Voltage A Curve
f = 20Hz to 20KHz 150
220 500 µV
µV
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Figure 4. Micropr ocess or Application
Figure 5. Microprocessor Drivin g Signal s
2
5
7
Vref
ST-BY 9
IN1
C1 0.22µF
VCC
156
D02AU1409
+
-
-
+
OUT1+
OUT1-
19
16
14
MUTE 8
IN2
C3 0.22µF
+
-
-
+
OUT2+
OUT2-
20
13
S-GND
PW-GND
C5
470µFC6
100n
F
R1 10K
C2
10µF
µP
R2 10K
C4
1µF
1
10
11
+
VS(V)
VIN
(mV)
VST-BY
pin 9
Iq
(mA)
ST-BY MUTE
PLAY MUTE ST-BY
+13V
1.8
0.8
VMUTE
pin 8
4.1
2.3
OFF
OFF
D02AU1411-Mo
d
VOUT
(V)
2.9
1.3
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TDA7297D
Figure 6. THD+N vs Output Power
Figure 7. THD+N vs Output Power
Figure 8. THD+N vs Frequency
Figu re 9. Freque ncy R espon se
Figure 10. Output Power vs supply Voltage
Figure 11. Power Dissip ation vs Pout
0.01
10
0.02
0.05
0.1
0.2
0.5
1
2
5
T
HD(%)
100m 2
0
200m 500m 1 2 5 10
2 x Pou t (W)
Vcc=13V
Rl= 8 ohm
F=1KHz
f=5KHz
f=1KHz
0.01
10
0.02
0.05
0.1
0.2
0.5
1
2
5
HD(%)
100m 1
200m 500m 1 2 5
2x Pout (W)
f=1KHz
f=5KHz
Vcc=11V
Rl= 8ohm
F=1KHz
0.01
10
0.02
0.05
0.1
0.2
0.5
1
2
5
T
HD(%)
20 10k50 100 200 500 1k 2k 5k
Frequency (Hz)
Vcc=13V
Rl= 8ohm
Po = 5W
-
5.000
-
4.000
-
3.000
-
2.000
-
1.000
0
.0
1
.0000
2
.0000
3
.0000
4
.0000
5
.0000
10 100 1k 10k 100
k
Level(dBr)
frequenc y (H z)
Vcc = 16.5V
R l = 8 ohm
Pout = 1W
0
2
4
6
8
10
12
14
16
67891011121314151
6
Vs (V)
Po(W)
Rl =8ohm
F=1KHz
d=10%
d=1%
0
2
4
6
8
10
12
14
16
67891011121314151
6
Vs (V)
Po(W)
Rl =8ohm
F=1KHz
d=10%
d=1%
0
1
2
3
4
5
6
7
8
9
10
11
0123456789101
1
2xPout(W)
Pdiss(W)
Vcc=13V
Rl = 8 ohm
F=1KHz
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Figu re 12 . Mut e A t te nu a tio n v s. Vpi n 8t
Figu re 13 . St andard-B y Atten ua ti on v s V pi n. 9
Figure 14. Quiescent Curent vs. Supply Voltage
11.522.533.544.5
5
0
10
-10
-20
-30
-40
-50
-60
-70
-80
-90
-
100
Attenuat ion (dB)
Vpin.6(V)
0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 2.2 2.4
0
10
-10
-20
-30
-40
-50
-60
-70
-80
-90
-
100
-
110
-
120
Attenuation (dB)
V p in.7 (V )
678910111213141516171
8
3
0
3
5
4
0
4
5
5
0
5
5
6
0
6
5
7
0
Iq ( m A)
Vsupply(V)
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TDA7297D
Figure 15. PC Board Component Layout
Figu re 16 . Ev al ua ti on Boar d To p Laye r Layout
Sign GND
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Figure 17. Evaluation Board Bottom Layer Layout
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TDA7297D
Figure 18. PowerS O20 (SLUG UP) Mechanical Data & Package Dimensi ons
OUTLINE AND
MECHANICAL DATA
e
A
A2
E
a1
A5
D2 (x2)
M
PSO20DME
D
E1
E2
E2
h x 45û
S
Gage Plane 0.35
L
DETAIL A
DETAIL A
(COPLANARITY)
GC
- C -
SEATING PLANE
e3
b
c
NH
N
V
E3
101
D1
20 11
A4
R
DIM. mm inch
MIN. TYP. MAX. MIN. TYP. MAX.
A 3.25 3.5 0.128 0.138
A2 3 3.15 3.3 0.118 0.124 0.130
A4 0.8 1 0.031 0.039
A5 0.15 0.2 0.25 0.006 0.008 0.010
a1 0.030
-0.040
0.0012
-0.0016
b 0.4 0.53 0.016 0.021
c 0.23 0.32 0.009 0.012
D (1) 15.8 16 0.622 0.630
D1 9.4 9.8 0.370 0.385
D2 1 0.039
E 13.9 14.5 0.547 0.570
E1 (1) 10.9 11.1 0.429 0.437
E2 2.9 0.114
E3 5.8 6.2 0.228 0.244
e 1.12 1.27 1.42 0.044 0.050 0.056
e3 11.43 0.450
G 0 0.1 0 0.004
H 15.5 15.9 0.61 0.625
h 1.1 0.043
L 0.8 1.1 0.031 0.043
N 10¡ (max)
R 0.6 0.024
S 0¡ (min.) 8¡ (max.)
V 5¡ (min.) 7¡ (max.)
(1) ÒD and E1Ó do not include mold flash or protusions.
- Mold flash or protusions sh all not exceed 0.15mm (0. 006Ó)
- Critical dimensions: ÒEÓ, Òa1Ó, ÒeÓ and ÒGÓ.
PowerSO20 (SLUG UP)
0088529 C
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Table 5. Revision History
Date Revision Description of Changes
May 2004 1 First Issue
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TDA7297D
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