TDA7266L
5W MONO BRIDGE AMPLIFIER
WIDE SUPPLY VO LTAGE RA NGE (3 .5V- 18V)
MINIMUM EXTERNAL COMPONENTS
– NO SVR CAPACITOR
– NO BOOTSTRA P
– NO BOUCHEROT CELLS
– INTERNALLY FIXED GAIN
STAND-BY & MUTE FUNCTIONS
SHORT CIR C U IT PROTECTION
THERMAL OVERLOAD PROTECTION
DESCRIPTION
The TDA7266L is a mono bridge amplifier spe-
cially designed for TV and Portable Radio appli-
cations.
February 2001
®
10
9
7
Vref
(ST-BY)
ST-BY 4
IN1
5V S
1
S
2
C
1
0.22µF
C
2
C
4
R
1
R
2
VCC
8
D99AU1039A
+
-
-
+
OUT+
OUT-
MUTE
MUTE 35
6
S-GND
PW-GND
C5
470µFC6
100nF
BLOCK AND APPLICATION DIAGRAM
SIP10
ORDERING NUMBER: TDA7266L
TECHNOLOGY BI2 0 II
1/7
Obsolete Product(s) - Obsolete Product(s) Obsolete Product(s) - Obsolete Product(s)
Obsolete Product(s) - Obsolete Product(s) Obsolete Product(s) - Obsolete Product(s)
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 3.5 10 18 V
IqTotal Quiescent Current 35 50 mA
VOS Output Offset Voltage 120 mV
POOutput Power THD = 10% 5.5 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 50 dB
AMUTE Mute Attenuation 60 80 dB
TWThermal Threshold 150 °C
GVClosed Loop Voltage Gain 32 dB
RiInput Resistance 31 33 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
8V
CC
IN
S-GND
PW-GND
ST-BY
MUTE
N.C.
N.C.
9
10
OUT-
OUT+
D99AU1040A
PIN C ONNECTION (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) 10 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 8 °C/W
Rth j-amb Thermal Resistance Junction to ambient 70 °C/W
TDA7266L
2/7
Obsolete Product(s) - Obsolete Product(s) Obsolete Product(s) - Obsolete Product(s)
ELECTRICA L CHARACTERI STICS (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
APPLICATION SUGGES TION
STAND-BY A ND MUTE FUNCTION S
(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 S t-by terminal ( Pin 7) starts to
increase exponentially. The external RC network
is intended to tur n-on slowly the biasing circuits of
the amplifier, t his 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 t o 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.
(B) Low Co s t Applica tion
In low cost applications where the µP 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 t he supply line
and the external capacitor C4 is intended to delay
the St-by and mute threshold exceeding, avoiding
"Popping" problems.
+VS(V)
VIN
(mV)
VST-BY
pin 7
Iq
(mA)
ST-BY MUTE
PLAY MUTE ST-BY
+18
1.8
0.8
VMUTE
pin 6
4.1
2.3
OFF
OFF
D96AU259
VOUT
(V)
2.9
1.3
Figure 1: Microprocess or Driving Signals.
TDA7266L
3/7
Obsolete Product(s) - Obsolete Product(s) Obsolete Product(s) - Obsolete Product(s)
Figure 2: PCB and Component Layout of the Application Diagram
The PC board layout off ers compatibility to TDA7266S, TDA7266, TDA7297, (t he BTL power amplifiers
in Multiwatt 15 package).
0.010
0.1
1
10
0.1 1 10
V cc = 11 V
Rl = 8 ohm
f = 15 KHz
f = 5 KHz
f = 1 KHz
Pout (W )
THD (%)
Figure 3: Distortion vs Output Power
0.010
0.1
1
10
0.1 1 10
THD(%)
Vcc = 9V
Rl= 8 ohm
f = 15KHz
f = 5 KH z
f = 1K H z
Pout (W )
Figure 4: Distortion vs Output Power
TDA7266L
4/7
Obsolete Product(s) - Obsolete Product(s) Obsolete Product(s) - Obsolete Product(s)
0.010
0.1
1
10
100 1k 10k 20k
THD(%)
Vcc = 11 V
Rl = 8 ohm
Pou t = 100 m W
Pout = 2W
freque ncy (Hz)
Figure 5: Distortion 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
Po ut = 1 W
frequency (Hz)
Figure 6: Gain vs Frequency
11.522.533.544.55
0
10
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
Attenuat ion (dB)
Vpin.6(V)
Figure 7: 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 8: Stand-By Att enuation vs Vpin.7
3456789101112131415161718
30
35
40
45
50
55
60
65
70 Iq (mA)
Vsupply(V)
Figure 9: Quiescent Current vs. Supply Voltage
TDA7266L
5/7
Obsolete Product(s) - Obsolete Product(s) Obsolete Product(s) - Obsolete Product(s)
SIP10
DIM. mm inch
MIN. TYP. MAX. MIN. TYP. MAX.
A 7.1 0.280
a1 2.7 3 0.106 0.118
B 24.8 0.976
b1 0.5 0.020
b3 0.85 1.6 0.033 0.063
C 3.3 0.130
c1 0.43 0.017
c2 1.32 0.052
D 23.7 0.933
d1 14.5 0.571
e 2.54 0.100
e3 22.86 0.900
L 3.1 0.122
L1 3 0.118
L2 17.6 0.693
L3 0.25 0.010
L4 0.254 0.010
M 3.2 0.126
N 1 0.039
P 0.15 0.006
D
N
M
L1
110
d1
L3
L2
La1
e3
b1
B
ec1
A
c2 C
P
L4
SIP10
b3
OUTLINE AND
MECHANICAL DATA
TDA7266L
6/7
Obsolete Product(s) - Obsolete Product(s) Obsolete Product(s) - Obsolete Product(s)
Infor mation furni shed is bel ieved to be ac curate and reliabl e. Howev er, STMicroel ectr onics assum es 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
grante d by implication or otherwis e under any patent or patent righ ts of STMicroelect ronics. Specifica tion mentione d in this publication are
subj ect to change without notic e. This public ation supers edes and rep laces all informat ion p reviousl y supplied. STMi croelec tron ics product s
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 regi st ered trademark of STMicr oel ect roni cs
©2001 STMicroelectronics – Printed in Italy – All Rights Reserved
STMicroelectronics GROUP OF COMPANIES
Australia - Brazil - Canada - China - France - Germany - Italy - Japan - Korea - Malaysia - Malta - Mexico - Morocco - The Netherlands -
Singapore - Spain - Sweden - Switzerland - Taiwan - Thailand - United Kingdom - U.S.A .
http://www.st.com
TDA7266L
7/7