View TDA7266_1323483.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

(R)
TDA7266
7+7W DUAL BRIDGE AMPLIFIER
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
TECHNOLOGY BI20II
Multiwatt 15
DESCRIPTION The TDA7266 is a dual bridge amplifier specially designed for TV and Portable Radio applications.
ORDERING NUMBER: TDA7266
BLOCK AND APPLICATION DIAGRAM
VCC 470F 0.22F IN1 3 4 + ST-BY 7 13 1 OUT1+ 100nF
S-GND
9
Vref
+ + -
2
OUT1-
0.22F IN2
12
15
OUT2+
MUTE
6
PW-GND
8 +
14
OUT2-
D94AU175B
March 2002
1/9
TDA7266
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 33 0 to 70 -40 to +150 Unit V A W C C
THERMAL DATA
Symbol Rth j-case Description Thermal Resistance Junction to case Typ. 1.4 Value Max. 2 Unit C/W
PIN CONNECTION (Top view)
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
D95AU261
OUT2+ OUT2VCC IN2 N.C. N.C. S-GND PW-GND ST-BY MUTE N.C. IN1 VCC OUT1OUT1+
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 Typ. 11 50 7 0.05 Max. 18 65 120 0.2 1 Unit V mA mV W % % dB dB dB C dB dB K V V
SVR CT AMUTE TW GV Gv Ri VTMUTE
Supply Voltage Rejection Crosstalk Mute Attenuation Thermal Threshold Closed Loop Voltage Gain Voltage Gain Matching Input Resistance Mute Threshold
THD = 10% PO = 1W PO = 0.1W to 2W f = 100Hz to 15kHz f = 100Hz VR = 0.5V
6.3
40 46 60 25 25 2.3 VCC/2 -1
56 60 80 150 26 30 2.9 VCC/2 -0.75
27 0.5 4.1 VCC/2 -0.5
for VCC > 6.4V; VO = -30dB for VCC < 6.4V; VO = -30dB
2/9
TDA7266
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 Figure 1: Microprocessor Application
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. 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.
VCC C1 0.22F IN1 ST-BY R1 10K C2 10F C5 470F OUT1+ C6 100nF
4
3 + -
13 1
7
P
S-GND
9 Vref + + 6 15 OUT2+ 2 OUT1-
C3 0.22F IN2 MUTE R2 10K C4 1F
12
PW-GND
8 +
14
OUT2-
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 ST-BY PLAY MUTE MUTE ST-BY OFF
D96AU259
(B) Low Cost Application In low cost applications where the mP 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.
4/9
TDA7266
Figure 3a: Stand-alone Low-cost Application.
VCC VCC R1 47K C3 0.22F IN1 ST-BY R2 47K C4 10F 7 C1 470F OUT1+ C2 100nF
4
3 + -
13 1
S-GND
9 Vref + + 15 OUT2+ 2 OUT1-
C5 0.22F IN2
12
MUTE
6
PW-GND
8 +
14
OUT2-
D95AU260A
Figure 3b: PCB and Component Layout of the Application Circuit (Fig. 1).
5/9
TDA7266
Figure 4: Distortion vs Output Power
TH D (% )
10 V cc = 11 V R l = 8 ohm 1
1
Figure 5: Distortion vs Output Power
T H D (% )
10
V cc = 9V Rl= 8 o h m
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 )
Figure 6: Distortion vs Frequency
THD(%)
10
Figure 7: 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 8: Output Power vs. Supply Voltage
2 0.000 1 8.000 1 6.000 1 4.000 1 2.000 1 0.000 8 .0000 6 .0000 4 .0000 2 .0000 U 0 .0 2 .000 4 .000 6 .000 8 .000 1 0.00 1 2.00 1 4.00 1 6.00 1 8.00 d = 1% R l = 8 o hm f = 1KH z d = 10%
Figure 9: Total Power Dissipation & Efficiency vs. Output Power
Ptot(W)
8 7 6 5 4 3 2 1 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 8 Vcc = 11V Rl = 8ohm (both channels) f = 1KHz Ptot
P o(W)
(%)
80 70 60 50 40 30 20 10 0
V s(V )
2 X Pout(W)
6/9
TDA7266
Figure 10: 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 11: 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 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
DIM. MIN. A B C D E F G G1 H1 H2 L L1 L2 L3 L4 L7 M M1 S S1 Dia1 21.9 21.7 17.65 17.25 10.3 2.65 4.25 4.63 1.9 1.9 3.65 4.55 5.08 17.5 10.7 22.2 22.1 0.49 0.66 1.02 17.53 19.6 20.2 22.5 22.5 18.1 17.75 10.9 2.9 4.85 5.53 2.6 2.6 3.85 0.862 0.854 0.695 0.679 0.406 0.104 0.167 0.182 0.075 0.075 0.144 0.179 0.200 0.689 0.421 0.874 0.870 1.27 17.78 1 0.55 0.75 1.52 18.03 0.019 0.026 0.040 0.690 0.772 0.795 0.886 0.886 0.713 0.699 0.429 0.114 0.191 0.218 0.102 0.102 0.152 0.050 0.700 mm TYP. MAX. 5 2.65 1.6 0.039 0.022 0.030 0.060 0.710 MIN. inch TYP. MAX. 0.197 0.104 0.063
OUTLINE AND MECHANICAL DATA
Multiwatt15 V
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 (c) 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

▲Up To Search▲

Price & Availability of TDA7266

	To Download TDA7266 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .