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TDA7266MA
June 2003
s
WIDE SUPPLY VOLTAGE RANGE (3-18V)
s
MINIMUM EXTERNAL COMPONENTS
NO SWR CAPACITOR
NO BOOTSTRAP
NO BOUCHEROT CELLS
INTERNALLY FIXED GAIN
s
STAND-BY & MUTE FUNCTIONS
s
SHORT CIRCUIT PROTECTION
s
THERMAL OVERLOAD PROTECTION
DESCRIPTION
The TDA7266MA is a mono bridge amplifier specially
designed for TV and Portable Radio applications.
Pin to pin compatible with: TDA7266S, TDA7266,
TDA7266M, TDA7266MA, TDA7266B, TDA7297SA
& TDA7297.
SIP9
ORDERING NUMBER: TDA7266MA
7W MONO BRIDGE AMPLIFIER
Figure 1. Block and Application Diagram
1
C5
C6
2
4
Vref
ST-BY/
MUTE
5
IN
0.22
F
C1
C2
10
F
R1 10k
VCC
3
D03AU1459_mod
+
-
-
+
OUT1+
OUT1-
7
6
S-GND
PW-GND
470
F
100nF
TECHNOLOGY BI20II
TDA7266MA
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ABSOLUTE MAXIMUM RATINGS
THERMAL DATA
PIN CONNECTION (Top view)
Symbol
Parameter
Value
Unit
V
s
Supply Voltage
20
V
I
O
Output Peak Current (internally limited)
2
A
T
op
Operating Temperature
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
9
C/W
ELECTRICAL CHARACTERISTCS
(V
CC
= 11V, R
L
= 8
, f = 1KHz, T
amb
= 25C unless otherwise specified)
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
V
CC
Supply Range
3
11
18
V
I
q
Total Quiescent Current
50
65
mA
V
OS
Output Offset Voltage
120
mV
P
O
Output Power
THD 10%
6.3
7
W
THD
Total Harmonic Distortion
P
O
= 1W
0.05
0.2
%
P
O
= 0.1W to 2W
f = 100Hz to 15KHz
1
%
SVR
Supply Voltage Rejection
f = 100Hz, V
R
=0.5V
40
56
dB
A
MUTE
Mute Attenuation
60
80
dB
T
w
Thermal Threshold
150
C
G
V
Closed Loop Voltage Gain
25
26
27
dB
R
i
Input Resistance
25
30
K
1
2
3
4
5
6
7
8
N.C.
PGND
SGND
STBY/MUTE
IN
V
CC
OUT-
OUT+
9
N.C.
D03AU1460
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TDA7266MA
APPLICATION SUGGESTION
STAND-BY AND MUTE FUNCTIONS
Figure 2. Microprocessor Driving Signals
The St-by and mute terminals are tied together and they are connected to the supply line via an external voltage
divider.
The device is switched-on/off from the supply line and the external capacitor C4 is intended to delay the St-by
and mute threshold exceeding, avoiding "Popping" problems.
VT
MUTE
Mute Threshold
for V
CC
> 6.4V; Vo = -30dB
2.3
2.9
4.1
V
for V
CC
< 6.4V; Vo = -30dB
V
CC
/2
-1
V
CC
/2
-075
V
CC
/2
-0.5
V
VT
ST-BY
St-by Threshold
0.8
1.3
1.8
V
I
ST-BY
St-by Current V6 = GND
100
A
e
N
Total Output Voltage
A Curve; f = 20Hzto 20KHz
150
V
ELECTRICAL CHARACTERISTCS (continued)
(V
CC
= 11V, R
L
= 8
, f = 1KHz, T
amb
= 25C unless otherwise specified)
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
+V
S
(V)
V
IN
(mV)
I
q
(mA)
ST-BY
MUTE
PLAY
MUTE
ST-BY
+18
1.0
0.5
V
MUTE/
STBY
pin 5
4.1
2.3
OFF
OFF
D03AU1461
V
OUT
(V)
2.9
0.75
TDA7266MA
4/9
Figure 3. Stand-alone low-cost Application
1
2
4
Vref
ST-BY/MUTE
15
IN1
C3 0.22
F
VCC
3
D03AU1462
+
-
-
+
OUT1+
OUT1-
7
6
S-GND
PW-GND
C1
470
F
C2
100nF
R1
47K
C4
10
F
R2
47K
Figure 4. Distortion vs Ouput Power
Figure 5. Distortion vs Ouput Power
Figure 6. Distortion vs. Frequency
Figure 7. Gain vs Frequency
0.010
0.1
1
10
0.1
1
10
Vcc = 11 V
Rl = 8 ohm
f = 15 KHz
f = 5 KHz
f = 1 KHz
Pout (W)
THD (%)
0.010
0.1
1
10
0.1
1
10
THD(%)
Vcc = 9V
Rl= 8 ohm
f = 15KHz
f = 5 KHz
f = 1KHz
Pout (W)
0.010
0.1
1
10
100
1k
10k
20k
THD(%)
Vcc = 11 V
Rl = 8 ohm
Pout = 100mW
Pout = 2W
frequency (Hz)
-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
100k
Level(dBr)
Vcc = 11V
Rl = 8 ohm
Pout = 1W
frequency (Hz)
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TDA7266MA
Figure 8. Output Power vs. Supply Voltage
Figure 9. P
tot
Dissipation & Efficiency vs. P
out
Figure 10. Mute & Stand-By Attenuation vs
Vpin. 5
Figure 11. Quiescent Current vs. Supply
Voltage
0.0
2.0000
4.0000
6.0000
8.0000
10.000
Po (W)
2.000
4.000
6.000
8.000
10.00
12.00
Vs (V)
d = 10%
d = 1%
Rl = 8 ohm
f = 1kHz
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 6.5 7 7.5 8
0
0.5
1
1.5
2
2.5
3
3.5
4
0
10
20
30
40
50
60
70
80
Pd (W)
(%)
Pout(W)
Vcc = 11V
Rl = 8ohm
f = 1KHz
Pd
1
1 .5
2
2 .5
3
3.5
4
4 .5
5
0
1 0
-1 0
-2 0
-3 0
-4 0
-5 0
-6 0
-7 0
-8 0
-9 0
-10 0
-11 0
-12 0
A tte n u atio n (d B )
V pin.5 (V )
3
4
5
6
7
8
9
10 11 12 13 14 15 16 17 18
30
35
40
45
50
55
60
65
70
Iq (mA)
Vsupply(V)
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