tda7266

TDA7266
Datasheet
7 + 7 W dual bridge amplifier
Features
•
•
Multiwatt15
•
•
•
Wide supply voltage range (3 - 18 V)
Minimum external components
–
No SWR capacitor
–
No bootstrap
–
No boucherot cells
–
Internally fixed gain
Standby and mute functions
Short-circuit protection
Thermal overload protection
Description
The TDA7266 is a dual bridge amplifier specially designed for TV and portable radio
applications.
Maturity status link
TDA7266
Order code
TDA7266
DS0184 - Rev 11 - June 2019
For further information contact your local STMicroelectronics sales office.
www.st.com
TDA7266
Block diagram
1
Block diagram
Figure 1. Block and application diagram
VCC
3
0.22µF
4
IN1
+
470µF
13
1
OUT1+
2
OUT1-
15
OUT2+
14
OUT2-
100nF
ST-BY
7
S-GND
0.22µF
IN2
9
Vref
12
+
+
-
MUTE
6
PW-GND
DS0184 - Rev 11
8
+
page 2/17
TDA7266
Maximum ratings
2
Maximum ratings
Table 1. Absolute maximum ratings
Symbol
Parameter
Value
Unit
VS
Supply voltage
20
V
IO
Output peak current (internally limited)
2
A
Ptot
Total power dissipation (Tcase= 70 °C)
33
W
Top
Operating temperature
-10 to +85
°C
Tstg
Storage temperature
Tj
Junction temperature
-40 to +150
°C
Table 2. Thermal data
DS0184 - Rev 11
Symbol
Parameter
Typ.
Max.
Unit
Rth-jcase
Thermal resistance junction-case
1.4
2
°C/W
page 3/17
TDA7266
Pin connection
3
Pin connection
Figure 2. Pin connection (top view)
DS0184 - Rev 11
15
OUT2+
14
OUT2-
13
VCC
12
IN2
11
N.C.
10
N.C.
9
S-GND
8
PW-GND
7
ST-BY
6
MUTE
5
N.C.
4
IN1
3
VCC
2
OUT1-
1
OUT1+
page 4/17
TDA7266
Electrical characteristics
4
Electrical characteristics
VCC = 11 V, RL = 8 Ω, f = 1 kHz, Tamb = 25 °C unless otherwise specified.
Table 3. Electrical characteristics
Symbol
VCC
Iq
Parameter
Test conditions
Supply range
Min.
Typ.
Max.
Unit
3
11
18
V
50
65
mA
120
mV
Total quiescent current
VOS
Output offset voltage
PO
Output power
THD = 10%
6.3
PO = 1 W
THD
Total harmonic distortion
7
0.05
PO = 1 W to 2 W
CT
AMUTE
f = 100 Hz, VR = 0.5 V
Crosstalk
%
40
56
dB
46
60
dB
25
26
Mute attenuation
TW
Thermal threshold
GV
Closed loop voltage gain
∆GV
DS0184 - Rev 11
Supply voltage rejection
0.2
1
f = 100 Hz to 15 kHz
SVR
W
Voltage gain matching
RI
Input resistance
VTMUTE
Mute threshold
VTST-BY
ST-BY threshold
IST-BY
ST-BY current V6 = GND
eN
Total output noise voltage
27
0.5
dB
25
30
for VCC > 6.4 V; VO = -30 dB
2.3
2.9
4.1
for VCC < 6.4 V; VO = -30 dB
VCC/2-1
VCC/2-0.75
VCC/2-0.5
0.8
1.3
1.8
V
100
µA
A curve
f = 20 Hz to 20 kHz
150
kΩ
V
µV
page 5/17
TDA7266
Application suggestion
5
Application suggestion
Standby and mute functions
(A) Microprocessor application
Turn-on/off transients, guarantee the right ST-BY and mute signal sequence.
This function can be got thanks to a microprocessor (Figure 3. Microprocessor application and
Figure 4. Microprocessor driving signals).
At first ST-BY signal (from microprocessor) goes high and the voltage across the ST-BY terminal (Pin 7) starts to
increase exponentially. The external RC network turns on slowly the biasing circuits of the amplifier, 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.
The mute signal must be kept low until the capacitors are fully charged, so to avoid that the device goes to play
mode causing a loud "Pop Noise" on the speakers.
A delay of 100 - 200 ms between ST-BY and mute signals is suitable for a proper operation.
Figure 3. Microprocessor application
VCC
C1 0.22µF
IN1
3
4
+
1
C5
470µF
OUT1+
2
OUT1-
15
OUT2+
14
OUT2-
13
C6
100nF
-
ST-BY R1 10K
7
C2
10µF
S-GND
µP
9
Vref
C3 0.22µF
IN2
MUTE R2 10K
12
+
+
-
6
C4
1µF
PW-GND
DS0184 - Rev 11
8
+
page 6/17
TDA7266
Application suggestion
Figure 4. Microprocessor driving signals
+VS(V)
+18
VIN
(mV)
VST-BY
pin 7
1.8
1.3
0.8
VMUTE
pin 6
4.1
2.9
2.3
Iq
(mA)
VOUT
(V)
OFF
ST-BY
PLAY
MUTE
ST-BY
OFF
MUTE
(B) Low cost application
In low cost applications where the microprocessor is not present, the suggested circuit is shown in
Figure 5. Stand-alone low-cost application.
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.
DS0184 - Rev 11
page 7/17
TDA7266
Application suggestion
Figure 5. Stand-alone low-cost application
VCC
VCC
C3 0.22µF
R1
47K
4
+
IN1
ST-BY
R2
47K
3
1
C1
470µF
OUT1+
2
OUT1-
15
OUT2+
14
OUT2-
13
C2
100nF
7
C4
10µF
S-GND
9
Vref
C5 0.22µF
12
IN2
+
+
-
MUTE
PW-GND
6
8
+
Figure 6. PCB and component layout of the application circuit (Fig. 1)
DS0184 - Rev 11
page 8/17
TDA7266
Typical characteristics
6
Typical characteristics
Figure 7. Distortion vs. output power (VCC = 11 V)
Figure 8. Distortion vs. output power (VCC = 9 V)
THD (% )
T H D (% )
10
10
V cc = 11 V
R l = 8 oh m
V cc = 9V
Rl= 8 oh m
1
1
f = 1 5KH z
f = 15 KH z
0.1
0.1
f = 5 KH z
f = 5 K Hz
f = 1 KH z
f = 1 KH z
0.0 10
0.01 0
0 .1
1
0 .1
10
1
P ou t (W )
10
Pou t (W )
Figure 9. Distortion vs. frequency
Figure 10. Gain vs. frequency
THD (%)
Level(dBr)
10
5.000 0
4.0000
1
Vcc = 11V
Rl = 8 ohm
Pout = 1W
3.0000
V cc = 11 V
Rl = 8 o hm
2.0000
1.0000
0.0
-1.00 0
P ou t = 10 0 mW
0.1
-2.00 0
-3.00 0
P ou t = 2W
-4.00 0
0.0 10
100
1k
freque ncy (Hz)
DS0184 - Rev 11
10k
20k
-5.00 0
10
10 0
1k
10 k
10 0k
frequency (Hz)
page 9/17
TDA7266
Typical characteristics
Figure 12. Total power dissipation & efficiency vs. output
power
Figure 11. Output power vs. supply voltage
P o (W)
Ptot (W)
2 0.00 0
µ (%)
80
8
1 8.00 0
R l = 8 o hm
f = 1KH z
1 6.00 0
7
1 4.00 0
70
Ptot
6
d = 10 %
1 2.00 0
60
µ
50
5
1 0.00 0
4
d = 1%
8 .000 0
6 .000 0
3
4 .000 0
2
2 .000 0
1
0 .0
2 .00 0
4 .00 0
6 .00 0
8 .00 0
1 0.00
1 2.00
1 4.00
1 6.00
1 8.00
0
Figure 14. Standby attenuation vs. Vpin. 7
Attenuation (dB)
Attenuation (dB)
10
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
-110
-120
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
2
2.5
3
Vpin.6 (V)
DS0184 - Rev 11
0
2 X Pout (W)
10
1.5
20
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
Figure 13. Mute attenuation vs. Vpin. 6
1
30
10
V s (V )
-100
40
Vcc = 11V
Rl = 8ohm (both channels)
f = 1KHz
3.5
4
4.5
5
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
2.2
2.4
Vpin.7 (V)
page 10/17
TDA7266
Typical characteristics
Figure 15. Quiescent current vs. supply voltage
Iq (mA)
70
65
60
55
50
45
40
35
30
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
Vsupply (V)
DS0184 - Rev 11
page 11/17
TDA7266
Package information
7
Package information
In order to meet environmental requirements, ST offers these devices in different grades of ECOPACK packages,
depending on their level of environmental compliance. ECOPACK specifications, grade definitions and product
status are available at: www.st.com. ECOPACK is an ST trademark.
DS0184 - Rev 11
page 12/17
TDA7266
Multiwatt15 V package information
7.1
Multiwatt15 V package information
Figure 16. Multiwatt15 V package outline
Table 4. Multiwatt15 V package mechanical data
Symbol
Milimeters
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
DS0184 - Rev 11
Inches
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
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
0.713
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
page 13/17
TDA7266
Multiwatt15 V package information
Symbol
DS0184 - Rev 11
Milimeters
Min.
Typ.
Inches
Max.
Min.
Typ.
Max.
S1
1.9
2.6
0.075
0.102
Dia1
3.65
3.85
0.144
0.152
page 14/17
TDA7266
Revision history
Table 5. Document revision history
DS0184 - Rev 11
Date
Version
Changes
24-Mar-2002
10
No history because of migration.
18-Jun-2019
11
Updated operating temperature value in Table 1. Absolute maximum ratings.
page 15/17
TDA7266
Contents
Contents
1
Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
2
Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
3
Pin connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
4
Electrical characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
5
Application suggestion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
6
Typical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
7
Package information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
7.1
Multiwatt15 leads package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
DS0184 - Rev 11
page 16/17
TDA7266
IMPORTANT NOTICE – PLEASE READ CAREFULLY
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Information in this document supersedes and replaces information previously supplied in any prior versions of this document.
© 2019 STMicroelectronics – All rights reserved
DS0184 - Rev 11
page 17/17