TDA7266M
7W MONO BRIDGE AMPLIFIER
WID E SU P PLY VOLT AG E RANGE (3 -18 V)
MINIM U M EX T ERNAL CO MPONENTS
– NO SWR CAPACITOR
– NO BOOTSTRA P
– NO BOUCHERO T CELLS
– INTERNALLY FIXED GAIN
STAND-BY & MUTE FUNCTIONS
SHORT CIRCUIT PROTE CTION
THER MAL OVE R L OAD PROTECTION
DESCRIPTION
The TDA7266M is a mono bridge amplifier spe-
cially designed for TV and Portable Radio appli-
cations.
July 2002
®
1
2
4
Vref
ST-BY 7
VCC
0.22µF
VCC
133
D98AU831A
+
-
-
+
OUT1+
OUT1-
MUTE 6 8
9
S-GND
PW-GND
470µF 100nF
BLOCK AND APPLICATION DIAGRAM
Multiwatt 15
ORDERING NUMBER: TDA7266M
TECHNOLOGY BI20II
1/9
ELECTRICAL CHARACTERISTICS (VCC = 11V, RL = 8, f = 1kHz, Tamb = 25°C unless otherwise
specified.)
Symbol Parameter Test Condition Min. Typ. Max. Unit
VCC Supply Range 3 11 18 V
IqTotal Quiescent Current 50 65 mA
VOS Output Offset Voltage 120 mV
POOutput Power THD = 10% 6.3 7 W
THD Total Harmonic Distortion PO = 1W 0.05 0.2 %
PO = 0.1W to 2W
f = 100Hz to 15kHz 1%
SVR Supply Voltage Rejection f = 100Hz VR = 0.5V 40 56 dB
AMUTE Mute Attenuation 60 80 dB
TWThermal Threshold 150 °C
GVClosed Loop Voltage Gain 25 26 27 dB
RiInput Resistance 25 30 K
VTMUTE Mute Threshold for VCC > 6.4V; VO = -30dB
for VCC < 6.4V; VO = -30dB 2.3
VCC/2
-1
2.9
VCC/2
-0.75
4.1
VCC/2
-0.5
V
V
1
2
3
4
5
6
7
9
10
11
8
N.C.
N.C.
S-GND
PW-GND
ST-BY
MUTE
N.C.
IN1
V
CC
OUT1-
OUT1+
13
14
15
12
N.C.
N.C.
VCC
N.C.
D98AU832
PIN CONNECT ION (Top view)
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value Unit
VSSupply Voltage 20 V
IOOutput Peak Current (internally limited) 2 A
Ptot Total Power Dissipation (Tcase = 70°C) 33 W
Top Operating Temperature 0 to 70 °C
Tstg, TjStorage and Junction Temperature -40 to +150 °C
THERMAL DATA
Symbol Description Value Unit
Rth j-case Thermal Resistance Junction to case Typ. 1.4 Max. 2 °C/W
TDA7266M
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1
2
4
Vref
ST-BY 7
IN1
C1 0.22µF
VCC
133
D98AU833A
+
-
-
+
OUT1+
OUT1-
MUTE 68
9
S-GND
PW-GND
C5
470µFC6
100nF
R1 10K
C2
10µF
µP
R2 10K
C4
1µF
Figure 1: Microprocessor Application
ELECTRICAL CHARACTERISTICS (Continued)
Symbol Parameter Test Condition Min. Typ. Max. Unit
VTST-BY St-by Threshold 0.8 1.3 1.8 V
IST-BY ST-BY current V6 = GND 100 µA
eNTotal Output Noise Voltage A curve
f = 20Hz to 20kHz 150 µV
APP LICATION SUG GES TION
STAND-BY AND MUTE FUN C TION S
(A) Microprocessor Applicatio n
In order to avoid annoying "Pop-Noise" during
Turn-On/Off transients, it is necessary to guaran-
tee the right St-by and mute signals sequence.
It is quite simple to obtain this function using a mi-
croprocessor (Fig. 1 and 2).
At first St-by signal (from mP) goes high and the
voltage across the St- by t erminal (Pin 7) s tarts to
increase exponentially. The external RC network
is intended to turn-on slowly the biasing circuits of
the amplifier, this to avoid "POP" and "CLICK" on
the outputs.
When this voltage reaches the St-by threshold
level, the amplifier is switched-on and the external
capacitors in series to the input terminals (C3,
C5) start to charge.
It’s necessary to mantain the mute sign al low until
the capacitors are fully charged, this to avoid t hat
the device goes in play mode causing a loud "Pop
Noise" on the speakers.
A delay of 100-200ms between St-by and mute
signals is suitable for a proper operation.
TDA7266M
3/9
+V
S
(V)
V
IN
(mV)
V
ST-BY
pin 7
I
q
(mA)
ST-BY MUTE
PLAY MUTE ST-BY
+18
1.8
0.8
V
MUTE
pin 6
4.1
2.3
OFF
OFF
D96AU259
V
OUT
(V)
2.9
1.3
Figure 2: Microprocessor Driving Signa ls.
(B) Low Co s t Applicati on
In low cost applications where the mP is not pre-
sent, the suggested circuit is shown in fig.3.
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 capacit or C4 is intended to delay
the St-by and m ute threshold ex ceeding, avoiding
"Popping" problems.
TDA7266M
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1
2
4
Vref
ST-BY 7
IN1
C3 0.22µF
VCC
133
D98AU834B
+
-
-
+
OUT1+
OUT1-
MUTE 68
9
S-GND
PW-GND
C1
470µFC2
100nF
R1
47K
C4
10µF
R2
47K
Vs
Figure 3a: Stand-alone Low-cost Application.
Figure 3b: PCB and Component Layout of the Applic ation C ircuit (Fig. 1).
DASHED PARTS
ARE NOT TO BE
CONSIDERED
TDA7266M
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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 (%)
Figure 4: D istortion vs Output Power
0.010
0.1
1
10
0.1 1 10
THD(%)
Vc c = 9V
Rl= 8 ohm
f = 1 5KHz
f = 5 KHz
f = 1 KHz
Pout (W)
Figure 5: Dist or tion vs Output Power
0.010
0.1
1
10
100 1k 10k 20k
THD(%)
Vcc = 11 V
Rl = 8 ohm
Pout = 100mW
Pout = 2W
frequ ency (Hz)
Figure 6: Dis tortion vs Frequency
-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
frequenc y (Hz)
Figure 7: Gain vs Frequency
0.0
2.0000
4.0000
6.0000
8.0000
10.000
12.000
14.000
16.000
18.000
20.000
2.000 4.000 6.000 8.000 10.00 12.00 14.00 16.00 18.00
Po(W)
Vs(V)
d = 10%
d = 1%
Rl = 8 ohm
f = 1KHz
Figure 8: Output Power vs. Supply Voltage
00.511.522.533.544.555.566.577.58
0
0.5
1
1.5
2
2.5
3
3.5
4
0
10
20
30
40
50
60
70
80
Pd (W) µ(%)
Pout(W)
Vcc = 11V
Rl = 8ohm
f = 1KHz
Pd
µ
Figure 9: Total Power Dis sipation & Efficiency
vs. Output Power
TDA7266M
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11.522.533.544.5
5
0
10
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
Attenuation (dB)
Vpin.6(V)
Figure 10: Mute Attenuation vs. V pin.6
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 )
Figure 11: Stand-By Attenuation vs Vpin.7
345678910111213141516171
8
30
35
40
45
50
55
60
65
70 Iq (mA )
Vsupply(V)
Figure 12: Quiescent Current vs. Supply Voltage
TDA7266M
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Multiwatt15 V
DIM. mm inch
MIN. TYP. MAX. MIN. TYP. MAX.
A 5 0.197
B 2.65 0.104
C 1.6 0.063
D 1 0.039
E 0.49 0.55 0.019 0.022
F 0.66 0.75 0.026 0.030
G 1.02 1.27 1.52 0.040 0.050 0.060
G1 17.53 17.78 18.03 0.690 0.700 0.710
H1 19.6 0.772
H2 20.2 0.795
L 21.9 22.2 22.5 0.862 0.874 0.886
L1 21.7 22.1 22.5 0.854 0.870 0.886
L2 17.65 18.1 0.695 0.713
L3 17.25 17.5 17.75 0.679 0.689 0.699
L4 10.3 10.7 10.9 0.406 0.421 0.429
L7 2.65 2.9 0.104 0.114
M 4.25 4.55 4.85 0.167 0.179 0.191
M1 4.63 5.08 5.53 0.182 0.200 0.218
S 1.9 2.6 0.075 0.102
S1 1.9 2.6 0.075 0.102
Dia1 3.65 3.85 0.144 0.152
OUTLINE AND
MECHANICAL DATA
TDA7266M
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TDA7266M
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