TDA7266M (R) 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 ORDERING NUMBER: TDA7266M DESCRIPTION The TDA7266M is a mono bridge amplifier specially designed for TV and Portable Radio applications. BLOCK AND APPLICATION DIAGRAM VCC 470F 3 0.22F 4 VCC + 100nF 13 1 OUT1+ 2 OUT1- ST-BY 7 S-GND MUTE 9 6 Vref + 8 PW-GND D98AU831A July 2002 1/9 TDA7266M ABSOLUTE MAXIMUM RATINGS Symbol Parameter VS IO Supply Voltage Output Peak Current (internally limited) Ptot Total Power Dissipation (Tcase = 70C) Top Operating Temperature Tstg, Tj Storage and Junction Temperature Value Unit 20 2 V A 33 W 0 to 70 C -40 to +150 C Value Unit THERMAL DATA Symbol Rth j-case Description Thermal Resistance Junction to case Typ. 1.4 Max. 2 C/W PIN CONNECTION (Top view) 15 N.C. 14 N.C. 13 VCC 12 N.C. 11 N.C. 10 N.C. 9 S-GND 8 PW-GND 7 ST-BY 6 MUTE 5 N.C. 4 IN1 3 VCC 2 OUT1- 1 OUT1+ D98AU832 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 SVR AMUTE TW GV Ri VTMUTE Supply Voltage Rejection Mute Attenuation Thermal Threshold Closed Loop Voltage Gain Input Resistance Mute Threshold 2/9 Test Condition THD = 10% PO = 1W PO = 0.1W to 2W f = 100Hz to 15kHz f = 100Hz VR = 0.5V for VCC > 6.4V; VO = -30dB for VCC < 6.4V; VO = -30dB Min. 3 Typ. 11 50 6.3 7 0.05 40 60 25 25 2.3 VCC/2 -1 56 80 150 26 30 2.9 VCC/2 -0.75 Max. 18 65 120 0.2 1 27 4.1 VCC/2 -0.5 Unit V mA mV W % % dB dB C dB K V V 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 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 Typ. 1.3 Max. 1.8 100 150 Unit V A V 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. Figure 1: Microprocessor Application VCC C1 0.22F IN1 3 4 + 1 C5 470F OUT1+ 2 OUT1- 13 C6 100nF - ST-BY R1 10K 7 C2 10F S-GND P 9 Vref MUTE R2 10K C4 1F 6 + 8 PW-GND D98AU833A 3/9 TDA7266M 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 (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 4/9 MUTE ST-BY OFF D96AU259 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. TDA7266M Figure 3a: Stand-alone Low-cost Application. VCC Vs C3 0.22F R1 47K 4 1 C1 470F OUT1+ 2 OUT1- 13 + IN1 ST-BY R2 47K 3 C2 100nF 7 C4 10F S-GND 9 Vref MUTE + 6 8 PW-GND D98AU834B 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 Figure 5: Distortion vs Output Power THD (%) THD(%) 10 10 Vcc = 11 V Rl = 8 ohm Vcc = 9V Rl= 8 ohm 1 1 f = 15 KHz f = 15KHz 0.1 0.1 f = 5 KHz f = 5 KHz f = 1 KHz f = 1KHz 0.010 0.1 1 10 0.010 0.1 1 Pout (W) 10 Pout (W) Figure 6: Distortion vs Frequency Figure 7: Gain vs Frequency THD(%) Level(dBr) 10 5.0000 4.0000 1 Vcc = 11V Rl = 8 ohm Pout = 1W 3.0000 Vcc = 11 V Rl = 8 ohm 2.0000 1.0000 0.0 -1.000 Pout = 100mW 0.1 -2.000 -3.000 Pout = 2W -4.000 0.010 100 1k 10k 20k -5.000 10 100 1k frequency (Hz) 10k 100k frequency (Hz) Figure 8: Output Power vs. Supply Voltage Figure 9: Total Power Dissipation & Efficiency vs. Output Power Po(W) (%) Pd (W) 20.000 4 80 18.000 3.5 Rl = 8 ohm f = 1KHz 16.000 70 Pd 3 14.000 60 d = 10% 2.5 12.000 2 10.000 d = 1% 8.0000 1.5 6.0000 4.0000 50 Vcc = 11V Rl = 8ohm f = 1KHz 40 30 1 20 0.5 10 2.0000 0 0.0 2.000 4.000 6.000 8.000 10.00 Vs(V) 6/9 12.00 14.00 16.00 18.00 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 Pout(W) TDA7266M Figure 10: Mute Attenuation vs. V pin.6 Figure 11: Stand-By Attenuation vs Vpin.7 Attenuation (dB) 10 0 -10 -20 -30 -40 -50 -60 -70 -80 -90 -100 -110 -120 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 Vpin.6(V) 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.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 TDA7266M mm DIM. MIN. TYP. inch MAX. MIN. TYP. MAX. A 5 0.197 B 2.65 0.104 C 1.6 D 0.063 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 L 20.2 0.795 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 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 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 8/9 OUTLINE AND MECHANICAL DATA 0.713 0.114 Multiwatt15 V 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) 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