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TDA7266

更新时间：2025-11-04 02:24:53
品牌：STMICROELECTRONICS
描述：7+7W DUAL BRIDGE AMPLIFIER

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TDA7266 概述

7+7W DUAL BRIDGE AMPLIFIER 7 + 7W双桥放大器 音频放大器

TDA7266 数据手册

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TDA7266  
7+7W DUAL BRIDGE AMPLIFIER  
TECHNOLOGY BI20II  
®
WIDE SUPPLY VOLTAGE RANGE (3-18V)  
MINIMUM EXTERNAL COMPONENTS  
– NO SWR CAPACITOR  
– NO BOOTSTRAP  
– NO BOUCHEROT CELLS  
– INTERNALLY FIXED GAIN  
STAND-BY & MUTE FUNCTIONS  
SHORT CIRCUIT PROTECTION  
THERMAL OVERLOAD PROTECTION  
Multiwatt 15  
ORDERING NUMBER:  
TDA7266  
DESCRIPTION  
The TDA7266 is a dual bridge amplifier specially  
designed for TV and Portable Radio applications.  
BLOCK AND APPLICATION DIAGRAM  
V
CC  
470µF  
100nF  
3
13  
0.22µF  
4
IN1  
+
-
1
OUT1+  
ST-BY  
7
S-GND  
9
-
2
OUT1-  
OUT2+  
Vref  
+
0.22µF  
12  
IN2  
+
-
15  
MUTE  
6
-
14  
OUT2-  
PW-GND  
8
+
D94AU175B  
1/9  
March 2002  
TDA7266  
ABSOLUTE MAXIMUM RATINGS  
Symbol  
Parameter  
Value  
Unit  
V
VS  
IO  
Supply Voltage  
20  
2
Output Peak Current (internally limited)  
Total Power Dissipation (Tcase = 70°C)  
Operating Temperature  
A
Ptot  
33  
W
Top  
0 to 70  
-40 to +150  
°C  
°C  
Tstg, Tj  
Storage and Junction Temperature  
THERMAL DATA  
Symbol  
Description  
Value  
Unit  
Rth j-case Thermal Resistance Junction to case  
Typ. 1.4  
Max. 2  
°C/W  
PIN CONNECTION  
(Top view)  
15  
14  
13  
12  
11  
10  
9
OUT2+  
OUT2-  
VCC  
IN2  
N.C.  
N.C.  
S-GND  
PW-GND  
ST-BY  
MUTE  
N.C.  
8
7
6
5
4
IN1  
3
VCC  
2
OUT1-  
OUT1+  
1
D95AU261  
ELECTRICAL CHARACTERISTICS  
specified.)  
Ω
°
(VCC = 11V, RL = 8 , f = 1kHz, Tamb = 25 C unless otherwise  
Symbol  
VCC  
Iq  
Parameter  
Supply Range  
Test Condition  
Min.  
Typ.  
11  
Max.  
18  
Unit  
V
3
Total Quiescent Current  
Output Offset Voltage  
Output Power  
50  
65  
mA  
mV  
W
VOS  
PO  
120  
THD = 10%  
6.3  
7
THD  
Total Harmonic Distortion  
PO = 1W  
0.05  
0.2  
1
%
PO = 0.1W to 2W  
%
f = 100Hz to 15kHz  
SVR  
CT  
Supply Voltage Rejection  
Crosstalk  
f = 100Hz VR = 0.5V  
40  
46  
60  
56  
60  
dB  
dB  
dB  
°C  
dB  
dB  
KΩ  
AMUTE  
TW  
Mute Attenuation  
80  
Thermal Threshold  
Closed Loop Voltage Gain  
Voltage Gain Matching  
Input Resistance  
150  
26  
GV  
25  
27  
∆Gv  
Ri  
0.5  
25  
30  
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
2/9  
TDA7266  
ELECTRICAL CHARACTERISTICS  
(Continued)  
A curve  
Symbol  
VTST-BY  
IST-BY  
eN  
Parameter  
St-by Threshold  
Test Condition  
Min.  
Typ.  
Max.  
Unit  
V
0.8  
1.3  
1.8  
ST-BY current V6 = GND  
Total Output Noise Voltage  
100  
µA  
µV  
150  
f = 20Hz to 20kHz  
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.  
APPLICATION SUGGESTION  
STAND-BY AND MUTE FUNCTIONS  
(A) Microprocessor Application  
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 terminal (Pin 7) starts to  
increase exponentially. The external RC network  
is intended to turn-on slowly the biasing circuits of  
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 St-by and mute  
signals is suitable for a proper operation.  
Figure 1:  
Microprocessor Application  
V
CC  
C5  
470µF  
C6  
100nF  
C1 0.22µF  
3
13  
4
7
IN1  
+
-
1
OUT1+  
R1 10K  
ST-BY  
C2  
10µF  
S-GND  
µP  
9
-
2
OUT1-  
OUT2+  
Vref  
+
C3 0.22µF  
12  
IN2  
+
-
15  
R2 10K  
MUTE  
6
C4  
1µF  
-
14  
OUT2-  
PW-GND  
8
+
D95AU258A  
3/9  
TDA7266  
Figure 2:  
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  
PLAY  
MUTE  
ST-BY  
OFF  
ST-BY  
D96AU259  
MUTE  
external voltage divider.  
(B) Low Cost Application  
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.  
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  
4/9  
TDA7266  
Figure 3a:  
Stand-alone Low-cost Application.  
V
CC  
VCC  
C1  
470µF  
C2  
100nF  
C3 0.22µF  
IN1  
3
13  
4
7
R1  
47K  
+
-
1
OUT1+  
ST-BY  
R2  
C4  
47K  
10µF  
S-GND  
9
-
2
OUT1-  
OUT2+  
Vref  
+
C5 0.22µF  
12  
+
-
15  
IN2  
MUTE  
6
-
14  
OUT2-  
PW-GND  
8
+
D95AU260A  
Figure 3b:  
PCB and Component Layout of the Application Circuit (Fig. 1).  
5/9  
TDA7266  
Figure 4:  
Figure 5:  
Distortion vs Output Power  
Distortion vs Output Power  
THD (%)  
10  
THD(%)  
10  
Vcc = 11 V  
Rl = 8 ohm  
Vcc = 9V  
Rl= 8 ohm  
1
1
f = 15 KHz  
f = 15KHz  
0.1  
0.1  
f = 5 KHz  
f = 5 KHz  
f = 1 KHz  
f = 1KHz  
0.010  
0.1  
0.010  
0.1  
1
10  
1
10  
Pout (W )  
Pout (W )  
Figure 6:  
Figure 7:  
Distortion vs Frequency  
Gain vs Frequency  
THD(%)  
10  
Level(dBr)  
5.0000  
4.0000  
3.0000  
2.0000  
1.0000  
0.0  
Vcc = 11V  
Rl = 8 ohm  
Pout = 1W  
Vcc = 11 V  
Rl = 8 ohm  
1
-1.000  
-2.000  
-3.000  
-4.000  
Pout = 100mW  
0.1  
Pout = 2W  
0.010  
100  
-5.000  
10  
1k  
10k  
20k  
100  
1k  
10k  
100k  
frequency (Hz)  
frequency (Hz)  
Figure 8:  
Figure 9:  
Output Power vs. Supply Voltage  
Total Power Dissipation & Efficiency  
vs. Output Power  
Po(W)  
20.000  
µ(%)  
80  
Ptot(W)  
8
18.000  
16.000  
14.000  
12.000  
10.000  
8.0000  
6.0000  
4.0000  
2.0000  
7
6
5
4
3
2
1
0
70  
60  
50  
40  
30  
20  
10  
Ptot  
Rl = 8 ohm  
f = 1KHz  
µ
d = 10%  
Vcc = 11V  
Rl = 8ohm (both channels)  
f = 1KHz  
d = 1%  
0
8
U
0.0  
0
0.5  
1
1.5  
2
2.5  
3
3.5  
4 4.5 5 5.5 6 6.5 7 7.5  
2.000  
4.000  
6.000  
8.000  
10.00  
12.00  
14.00  
16.00  
18.00  
2 X Pout(W)  
Vs(V)  
6/9  
TDA7266  
Figure 10:  
Figure 11:  
Stand-By Attenuation vs Vpin.7  
Mute Attenuation vs. V pin.6  
Attenuation (dB)  
Attenuation (dB)  
10  
0
10  
0
-10  
-20  
-30  
-40  
-50  
-60  
-70  
-80  
-90  
-100  
-110  
-120  
-10  
-20  
-30  
-40  
-50  
-60  
-70  
-80  
-90  
-100  
1
1.5  
2
2.5  
3
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.6(V)  
Vpin.7 (V)  
Figure 12:  
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)  
7/9  
TDA7266  
mm  
inch  
DIM.  
OUTLINE AND  
MIN. TYP. MAX. MIN. TYP. MAX.  
MECHANICAL DATA  
A
B
5
0.197  
0.104  
0.063  
2.65  
1.6  
C
D
1
0.039  
E
0.49  
0.66  
1.02  
0.55 0.019  
0.75 0.026  
0.022  
0.030  
F
G
1.27  
1.52 0.040 0.050 0.060  
G1  
H1  
H2  
L
17.53 17.78 18.03 0.690 0.700 0.710  
19.6  
0.772  
20.2  
0.795  
21.9  
21.7  
22.2  
22.1  
22.5 0.862 0.874 0.886  
22.5 0.854 0.870 0.886  
L1  
L2  
L3  
L4  
L7  
M
17.65  
18.1 0.695  
0.713  
17.25 17.5 17.75 0.679 0.689 0.699  
10.3  
2.65  
4.25  
4.63  
1.9  
10.7  
10.9 0.406 0.421 0.429  
2.9 0.104 0.114  
4.55  
5.08  
4.85 0.167 0.179 0.191  
5.53 0.182 0.200 0.218  
M1  
S
2.6  
2.6  
0.075  
0.075  
0.102  
0.102  
0.152  
S1  
Dia1  
1.9  
Multiwatt15 V  
3.65  
3.85 0.144  
8/9  
TDA7266  
Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences  
of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is  
granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specification mentioned in this publication are  
subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products  
are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics.  
The ST logo is a registered trademark of STMicroelectronics  
© 2002 STMicroelectronics – Printed in Italy – All Rights Reserved  
STMicroelectronics GROUP OF COMPANIES  
Australia - Brazil - Canada - China - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan - Malaysia - Malta - Morocco -  
Singapore - Spain - Sweden - Switzerland - United Kingdom - United States.  
http://www.st.com  
9/9  

TDA7266 CAD模型

原理图符号

PCB 封装图

TDA7266 替代型号

型号 制造商 描述 替代类型 文档
TDA7266S STMICROELECTRONICS 5+5W DUAL BRIDGE AMPLIFIER 类似代替
TDA7294V STMICROELECTRONICS 100V - 100W DMOS AUDIO AMPLIFIER WITH MUTE/ST-BY 类似代替
TDA7297 STMICROELECTRONICS 15+15W DUAL BRIDGE AMPLIFIER 类似代替

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