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STMicroelectronics
STMicroelectronics

TDA7266SA Datasheet

7W+7W DUAL BRIDGE AMPLIFIER


TDA7266SA Datasheet Preview


TDA7266SA
7W+7W DUAL BRIDGE AMPLIFIER
s WIDE SUPPLY VOLTAGE RANGE (3.5-18V)
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 TDA7266SA is a dual bridge amplifier specially
designed for LCD Monitor, PC Motherboard, TV and
Portable Radio applications.
BLOCK AND APPLICATION DIAGRAM
www.DataSheet4U.com
0.22µF
IN1
ST-BY
4
7
TECHNOLOGY BI20II
CLIPWATT15
ORDERING NUMBER: TDA7266SA
Pin to pin compatible with: TDA7266S, TDA7266,
TDA7266M, TDA7266MA, TDA7266B, TDA7297SA
& TDA7297.
VCC
3 13
470µF
+ 1 OUT1+
-
100nF
S-GND
9
Vref
0.22µF
IN2
12
MUTE
6
- 2 OUT1-
+
+ 15 OUT2+
-
September 2003
PW-GND
8
- 14 OUT2-
+
D94AU175B
1/11
Page 1

TDA7266SA
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Vs
IO
Ptot
Top
Tstg, Tj
Supply Voltage
Output Peak Current (internally limited)
Total Power Dissipation (Tamb = 70°C)
Operating Temperature
Storage and Junction Temperature
THERMAL DATA
Symbol
Parameter
Rth j-case Thermal Resistance Junction-case
Rth j-amb Thermal Resistance Junction-ambient
Value
20
2
20
0 to 70
-40 to 150
Unit
V
A
W
°C
°C
Value
Typ = 1.8; Max. = 2.5
48
Unit
°C/W
°C/W
PIN CONNECTION (Top view)
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+
D03AU1463
ELECTRICAL CHARACTERISTCS
(VCC = 11V, RL = 8, f = 1KHz, Tamb = 25°C unless otherwise specified)
Symbol
Parameter
Test Condition
VCC Supply Range
Iq Total Quiescent Current
VOS Output Offset Voltage
PO Output Power
THD 10%
THD Total Harmonic Distortion
PO = 1W
PO = 0.1W to 2W
f = 100Hz to 15KHz
SVR Supply Voltage Rejection
f = 100Hz, VR =0.5V
CT Crosstalk
AMUTE Mute Attenuation
Tw Thermal Threshold
GV Closed Loop Voltage Gain
GV Voltage Gain Matching
Min.
3
6.3
Typ.
11
50
7
0.05
Max.
18
65
120
0.2
1
Unit
V
mA
mV
W
%
%
40 56
dB
46 60
dB
60 80
dB
150 °C
25 26 27 dB
0.5 dB
2/11
Page 2

TDA7266SA
ELECTRICAL CHARACTERISTCS (continued)
(VCC = 11V, RL = 8, f = 1KHz, Tamb = 25°C unless otherwise specified)
Symbol
Parameter
Test Condition
Ri Input Resistance
VTMUTE Mute Threshold
for VCC > 6.4V; Vo = -30dB
for VCC < 6.4V; Vo = -30dB
VTST-BY
IST-BY
eN
St-by Threshold
St-by Current V6 = GND
Total Output Voltage
A Curve; f = 20Hzto 20KHz
Min.
25
2.3
VCC/2
-1
0.8
Typ.
30
2.9
VCC/2
-075
1.3
150
Max.
4.1
VCC/2
-0.5
1.8
100
Unit
K
V
V
V
µA
µV
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 guarantee the right St-
by and mute signals sequence. It is quite simple to obtain this function using a microprocessor (Fig. 1 and 2).
At first St-by signal (from µP) goes high and the voltage across the St-by terminal (Pin 7) starts to increase ex-
ponentially. 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, C53) 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 St-by and mute signals is suitable for a proper operation.
Figure 1. Microprocessor Application
C1 0.22µF
IN1
ST-BY R1 10K
C2
10µF
4
7
VCC
3 13
C5
470µF
+ 1 OUT1+
-
C6
100nF
µP
S-GND
9
C3 0.22µF
IN2
Vref
12
MUTE R2 10K
C4
1µF
6
- 2 OUT1-
+
+ 15 OUT2+
-
PW-GND
8
- 14 OUT2-
+
D95AU258A
3/11
Page 3

TDA7266SA
Figure 2. Microprocessor Driving Signals
+VS(V)
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
MUTE
PLAY
MUTE
ST-BY
OFF
D96AU259mod
B) Low Cost Application
In low cost applications where the µP is not present, 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 capacitor C4 is intended to delay the St-by
and mute threshold exceeding, avoiding "Popping" problems.
4/11
Page 4
Part Number TDA7266SA
Manufactur STMicroelectronics
Description 7W+7W DUAL BRIDGE AMPLIFIER
Total Page 11 Pages
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