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(R)
TDA7266L
5W MONO BRIDGE AMPLIFIER
WIDE SUPPLY VOLTAGE RANGE (3.5V-18V) MINIMUM EXTERNAL COMPONENTS - NO SVR CAPACITOR - NO BOOTSTRAP - NO BOUCHEROT CELLS - INTERNALLY FIXED GAIN STAND-BY & MUTE FUNCTIONS SHORT CIRCUIT PROTECTION THERMAL OVERLOAD PROTECTION
TECHNOLOGY BI20II
SIP10
DESCRIPTION The TDA7266L is a mono bridge amplifier specially designed for TV and Portable Radio applications. BLOCK AND APPLICATION DIAGRAM
ORDERING NUMBER: TDA7266L
VCC C1 0.22F IN1 5V S1 (ST-BY) R1 ST-BY C2 S-GND C5 470F 10 OUT+ C6 100nF
8 7 + 4
6
Vref
+
9
OUT-
S2 MUTE
R2
MUTE C4
3
5
PW-GND
D99AU1039A
February 2001
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TDA7266L
ABSOLUTE MAXIMUM RATINGS
Symbol VS IO Ptot Top Tstg, Tj Supply Voltage Output Peak Current (internally limited) Total Power Dissipation (Tcase = 70C) Operating Temperature Storage and Junction Temperature Parameter Value 20 2 10 0 to 70 -40 to +150 Unit V A W C C
THERMAL DATA
Symbol Rth j-case Rth j-amb Description Thermal Resistance Junction to case Thermal Resistance Junction to ambient Value 8 70 Unit C/W C/W
PIN CONNECTION (Top view)
10 9 8 7 6 5 4 3 2 1
OUT+ OUTVCC IN S-GND PW-GND ST-BY MUTE N.C. N.C.
D99AU1040A
ELECTRICAL CHARACTERISTICS (VCC = 11V, RL = 8, f = 1kHz, Tamb = 25C unless otherwise specified.)
Symbol VCC Iq VOS PO THD Parameter Supply Range Total Quiescent Current Output Offset Voltage Output Power Total Harmonic Distortion Test Condition Min. 3.5 Typ. 10 35 7 0.05 Max. 18 50 120 0.2 1 Unit V mA mV W % % dB dB C dB K V V
SVR AMUTE TW GV Ri VTMUTE
Supply Voltage Rejection Mute Attenuation Thermal Threshold Closed Loop Voltage Gain Input Resistance Mute Threshold
THD = 10% PO = 1W PO = 0.1W to 2W f = 100Hz to 15kHz f = 100Hz VR = 0.5V
5.5
40 60
50 80 150 32 2.9 VCC/2 -0.75 33 4.1 VCC/2 -0.5
for VCC > 6.4V; VO = -30dB for VCC < 6.4V; VO = -30dB
31 2.3 VCC/2 -1
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TDA7266L
ELECTRICAL CHARACTERISTICS (Continued)
Symbol VTST-BY IST-BY eN Parameter St-by Threshold ST-BY current V6 = GND Total Output Noise Voltage Test Condition Min. 0.8 Typ. 1.3 150 Max. 1.8 100 Unit V A V
A curve f = 20Hz to 20kHz
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 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 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. Figure 1: Microprocessor Driving Signals.
+VS(V) +18
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. (B) Low Cost Application In low cost applications where the P 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.
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 MUTE ST-BY OFF
D96AU259
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TDA7266L
Figure 2: PCB and Component Layout of the Application Diagram
The PC board layout offers compatibility to TDA7266S, TDA7266, TDA7297, (the BTL power amplifiers in Multiwatt 15 package).
Figure 3: Distortion vs Output Power
TH D (% )
10 V cc = 11 V R l = 8 ohm 1
Figure 4: Distortion vs Output Power
T H D (% )
10
V cc = 9V Rl= 8 o h m 1
f = 15 K H z
f = 1 5K H z
0.1
f = 5 KH z
0.1 f = 5 K Hz
f = 1 KHz 0.010 0.1
0.0 10
f = 1 KH z
1
10
0.1
1
10
P ou t (W )
Po u t (W )
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TDA7266L
Figure 5: Distortion vs Frequency
THD(%)
10
Figure 6: Gain vs Frequency
Level(dBr)
5.0000 4.0000 Vcc = 11V Rl = 8 ohm Pout = 1W
1
V cc = 11 V Rl = 8 o hm
3.0000 2.0000 1.0000 0.0
P ou t = 100 m W
-1.000 -2.000 -3.000
P ou t = 2W
0.1
-4.000
0.0 10 100 1k 10k 20k
-5.000 10 100 1k 10k 100k
frequency (Hz)
frequency (Hz)
Figure 7: Mute Attenuation vs. V pin.6
Attenuation (dB)
10 0 -10 -20 -30 -40 -50 -60 -70 -80 -90 -100 1 1.5 2 2.5 3 3.5 4 4.5 5
Figure 8: Stand-By Attenuation vs Vpin.7
10 0 -10 -20 -30 -40 -50 -60 -70 -80 -90 -100 -110 -120
Attenuation (dB)
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 9: 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)
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TDA7266L
DIM. MIN. A a1 B b1 b3 C c1 c2 D d1 e e3 L L1 L2 L3 L4 M N P 3.2 1 0.15 3.1 3 17.6 0.25 0.254 0.126 0.039 0.006 14.5 2.54 22.86 0.122 0.118 0.693 0.010 0.010 0.85 3.3 0.43 1.32 23.7 0.571 0.100 0.900 0.5 1.6 0.033 0.130 0.017 0.052 0.933 2.7 mm TYP. MAX. 7.1 3 24.8 0.020 0.063 0.106 MIN. inch TYP. MAX. 0.280 0.118 0.976
OUTLINE AND MECHANICAL DATA
SIP10
D
C
L1
N P
M
L3
c2
d1
L2
a1
1
0 1
L4
L
b3 e3 B
b1 e 1 c
SIP10
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A
TDA7266L
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 (c)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
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