SGS Thomson Microelectronics TDA7266M Datasheet

TDA7266M
7W MONO BRIDGEAMPLIFIER
WIDESUPPLYVOLTAGERANGE(3-18V) MINIMUMEXTERNALCOMPONENTS
– NOSWR CAPACITOR – NOBOOTSTRAP – NOBOUCHEROT CELLS – INTERNALLYFIXED GAIN
DESCRIPTION
The TDA7266M is a mono bridge amplifier spe­cially designed for TV and Portable Radio appli­cations.
BLOCK AND APPLICATIONDIAGRAM
TECHNOLOGY BI20II
Multiwatt 15
ORDERING NUMBER: TDA7266M
V
CC
0.22µF
IN1
ST-BY 7
S-GND
MUTE 6 8
August 1998
4
9
+
-
-
Vref
+
133
1
2
470µF 100nF
OUT1+
OUT1-
PW-GND
D98AU831A
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TDA7266M
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value Unit
V
I P T
T
stg,Tj
THERMAL DATA
Symbol Description Value Unit
R
th j-case
Supply Voltage 20 V
S
Output Peak Current(internally limited) 2 A
O
Total Power Dissipation (T
tot
Operating Temperature 0 to 70 °C
op
=70°C) 33 W
case
Storage and Junction Temperature -40 to +150 °C
Thermal Resistance Junction to case Typ. 1.4 Max. 2 °C/W
PIN CONNECTION
ELECTRICAL CHARACTERISTICS
(Top view)
15 14 13 12 11 10
9 8 7 6 5 4 3 2 1
= 11V, RL=8Ω, f = 1kHz, T
(V
CC
D98AU832
N.C. N.C. VCC N.C. N.C. N.C. S-GND PW-GND ST-BY MUTE N.C. IN1 V
CC
OUT1­OUT1+
=25°C unless otherwise
amb
specified.)
Symbol Parameter Test Condition Min. Typ. Max. Unit
V
CC
I
q
V
OS
P
O
THD Total Harmonic Distortion P
SVR Supply Voltage Rejection f = 100Hz VR = 0.5V 40 56 dB
A
MUTE
T
W
G
V
R
VT
MUTE
Supply Range 3 11 18 V Total Quiescent Current 50 65 mA Output Offset Voltage 120 mV Output Power THD = 10% 6.3 7 W
= 1W 0.05 0.2 %
O
P
= 0.1W to 2W
O
f = 100Hz to 15kHz
Mute Attenuation 60 80 dB Thermal Threshold 150 Closed LoopVoltage Gain 25 26 27 dB Input Resistance 25 30 K
i
Mute Threshold for VCC> 6.4V; VO= -30dB
for V
< 6.4V; VO= -30dB
CC
2.3
VCC/2
-1
2.9
V
CC
-0.75
/2
1%
4.1
V
/2
CC
-0.5
C
°
V V
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TDA7266M
ELECTRICALCHARACTERISTICS
Symbol Parameter Test Condition Min. Typ. Max. Unit
VT
ST-BY
I
ST-BY
e
N
St-by Threshold 0.8 1.3 1.8 V ST-BY current V6 = GND 100 µA Total Output Noise Voltage A curve
APPLICATIONSUGGESTION
STAND-BYAND MUTE FUNCTIONS
(A) MicroprocessorApplication
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 mP) goes high and the voltage across the St-by terminal (Pin 7) startsto increase exponentially. The external RC network is intended to turn-onslowly the biasing circuits of
(Continued)
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-onand the external capacitors in series to the input terminals (C3, C5) start to charge.
It’s necessaryto 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 properoperation.
Figure 1: MicroprocessorApplication
V
µ
µP
IN1
ST-BY
MUTE
C1 0.22µF
R1 10K
C2
10µF
R2 10K
C4
1µF
S-GND
V
CC
4
7
9
Vref
68
+
-
-
+
133
1
OUT1+
2
OUT1-
PW-GND
C5
470µF
D98AU833A
C6
100nF
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TDA7266M
Figure 2:
MicroprocessorDriving Signals.
+VS(V)
+18
V
IN
(mV)
V
ST-BY
pin 7
1.8
1.3
0.8
V
MUTE
pin 6
4.1
2.9
2.3
I
q
(mA)
V
OUT
(V)
OFF
ST-BY
MUTE
PLAY MUTE ST-BY
(B) Low Cost Application
In low cost applications where the mP is not pre­sent, the suggestedcircuit is shown in fig.3.
The St-by and mute terminals are tied together and they are connected to the supply line via an
OFF
D96AU259
externalvoltage divider. The device is switched-on/off from the supply line
and the external capacitor C4 is intendedto delay the St-by and mute threshold exceeding, avoiding ”Popping”problems.
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TDA7266M
Figure 3a:
IN1
R1
47K
R2
47K
Stand-aloneLow-cost Application.
C3 0.22µF
IN1
ST-BY
C4
10µF
S-GND
MUTE
4
7
9
Vref
68
V
CC
133
+
1
470µF
OUT1+
C1
C2
100nF
-
-
2
OUT1-
+
PW-GND
Figure 3b:
DASHED PARTS ARE NOT TO BE CONSIDERED
D98AU834A
PCB and ComponentLayout of the Application Circuit (Fig. 1).
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TDA7266M
Figure 4:
THD(%)
10
DistortionvsOutputPower
Vcc =11 V Rl = 8 ohm
1
f = 15 KHz
0.1 f = 5 KHz
f = 1 KHz
0.010
0.1 1 10
Pout (W)
Figure 6:
THD(%)
0.010
DistortionvsFrequency
10
Vcc= 11V
1
0.1
Rl = 8ohm
Pout= 100mW
Pout= 2W
100 1k 10k 20k
frequency (Hz)
Figure5:
THD(%)
0.010
Distortionvs Output Power
10
Vcc = 9V Rl= 8 ohm
1
f = 15KHz
0.1 f = 5 KHz
f = 1KHz
0.1 1 10
Pout (W)
Figure7:
Level(dBr)
5.0000
4.0000
3.0000
2.0000
1.0000
0.0
-1.000
-2.000
-3.000
-4.000
-5.000
Gainvs Frequency
Vcc = 11V Rl= 8ohm Pout = 1W
10 100 1k 10k 100k
frequency(Hz)
Figure 8: OutputPower vs. Supply Voltage
Po(W)
20.000
18.000
16.000
14.000
12.000
10.000
8.0000
6.0000
4.0000
2.0000
0.0
2.000 4.000 6.000 8.000 10.00 12.00 14.00 16.00 18.00
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Rl = 8 ohm f = 1KHz
d=10%
d=1%
Vs(V)
Figure9: Total Power Dissipation& Efficiency
vs. Output Power
Pd (W)
4
3.5
3
2.5
2
1.5
1
0.5
0
Pd
µ
Vcc = 11V Rl = 8ohm f = 1KHz
00.511.522.533.544.555.566.577.58
Pout(W)
(%)
µ
80
70
60
50
40
30
20
10
0
TDA7266M
Figure 10:
MuteAttenuationvs. V pin.6
Attenua tio n(dB )
10
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
11.522.533.544.55
Vpin.6(V)
Figure 12:
QuiescentCurrent vs. Supply Voltage
Iq(mA)
70 65 60 55
Figure11:
Attenuation (dB)
10
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
-110
-120 0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 2.2 2.4
Stand-ByAttenuationvs Vpin.7
Vp in.7(V)
50 45 40 35 30
3456789101112131415161718
Vsuppl y(V)
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TDA7266M
MULTIWATT15 PACKAGE MECHANICAL DATA
DIM.
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
MIN. TYP. MAX. MIN. TYP. MAX.
mm inch
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TDA7266M
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