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| (R) TDA7266M 7W MONO 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 TDA7266M is a mono bridge amplifier specially designed for TV and Portable Radio applications. BLOCK AND APPLICATION DIAGRAM ORDERING NUMBER: TDA7266M VCC 470F 0.22F IN1 3 4 + ST-BY 7 13 1 OUT1+ 100nF S-GND 9 Vref + 2 OUT1- MUTE 6 8 PW-GND D98AU831A August 1998 1/9 TDA7266M 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 D98AU832 N.C. N.C. VCC N.C. 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 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 6.3 40 60 25 25 2.3 VCC/2 -1 for VCC > 6.4V; VO = -30dB for VCC < 6.4V; VO = -30dB 56 80 150 26 30 2.9 VCC/2 -0.75 27 4.1 VCC/2 -0.5 2/9 TDA7266M 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 + 8 PW-GND 2 OUT1- MUTE R2 10K C4 1F 6 D98AU833A 3/9 TDA7266M Figure 2: Microprocessor Driving Signals. +V S(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 TDA7266M Figure 3a: Stand-alone Low-cost Application. VCC IN1 R1 47K C3 0.22F IN1 ST-BY R2 47K C4 10F 7 3 + 13 1 C1 470F OUT1+ C2 100nF 4 S-GND 9 Vref + PW-GND 2 OUT1- MUTE 6 8 D98AU834A Figure 3b: PCB and Component Layout of the Application Circuit (Fig. 1). DASHED PARTS ARE NOT TO BE CONSIDERED 5/9 TDA7266M Figure 4: Distortion vs Output Power THD (%) 10 Vcc = 11 V Rl = 8 ohm 1 1 Figure 5: Distortion vs Output Power THD(%) 10 Vcc = 9V Rl= 8 ohm f = 15 KHz f = 15KHz 0.1 f = 5 KHz 0.1 f = 5 KHz f = 1 KHz 0.010 0.1 1 10 0.010 0.1 f = 1KHz 1 10 Pout (W) Pout (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 Vcc = 11 V Rl = 8 ohm 3.0000 2.0000 1.0000 0.0 0.1 Pout = 100mW -1.000 -2.000 -3.000 Pout = 2W -4.000 0.010 100 1k 10k 20k -5.000 10 100 1k 10k 100k frequency (Hz) frequency (Hz) Figure 8: Output Power vs. Supply Voltage Po(W ) 20.000 18.000 Figure 9: Total Power Dissipation & Efficiency vs. Output Power Pd (W) 4 3.5 (%) 80 70 60 50 40 Vcc = 11V Rl = 8ohm f = 1KHz 30 20 10 0 Pd 16.000 14.000 12.000 10.000 8.0000 6.0000 4.0000 Rl = 8 ohm f = 1KHz d = 10% 2.5 2 3 d = 1% 1.5 1 0.5 2.0000 0 0.0 2.000 4.000 6.000 8.000 10.00 12.00 14.00 16.00 1 8.00 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 Vs(V) Pout(W) 6/9 TDA7266M 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 Attenuation (d ) B 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 Vpin.6(V) Vp in.7(V) Figure 12: Quiescent Current vs. Supply Voltage Iq(m A) 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 TDA7266M MULTIWATT15 PACKAGE MECHANICAL DATA DIM. 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 MIN. 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 8/9 TDA7266M 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) 1998 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. 9/9 |
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