TDA7266S

TDA7266S ® 5+5W 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 ) s t( c u d (s) od r P e IN1 t e l o o r eP ST-BY s b t O e l o s b O S-GND 0.22µF IN2 4 l o bs O ) s ( t c u d 0.22µF o s b -O BLOCK AND APPLICATION DIAGRAM ) s t( c u d o r ORDERING NUMBER: TDA7266S DESCRIPTION The TDA7266S is a dual bridge amplifier specially designed for TV and Portable Radio applications. t c u e t le o r P Multiwatt 15 + P e et VCC 470µF 3 100nF 13 1 OUT1+ 2 OUT1- 15 OUT2+ 14 OUT2- - 7 9 Vref 12 + + - MUTE 6 PW-GND 8 + D94AU175B July 2002 1/8 TDA7266S ABSOLUTE MAXIMUM RATINGS Symbol Parameter VS IO Supply Voltage Output Peak Current (internally limited) Ptot Total Power Dissipation (Tcase = 70°C) Top Operating Temperature Tstg, Tj Storage and Junction Temperature Value Unit 20 1.5 V A 25 W 0 to 70 °C -40 to +150 °C Value Unit THERMAL DATA Symbol Rth j-case Description Thermal Resistance Junction to case Typ. 1.6 ) s ( t c u PIN CONNECTION (Top view) 15 OUT2+ 14 OUT2- 12 let 11 10 so 9 8 Ob 7 )- 3 2 1 ) s t( c u d o r N.C. N.C. S-GND P e et PW-GND MUTE l o bs s ( t c O u d ) o r s ( t P c e u t d e l o r o s P b e t O e l o s b O 4 IN2 ST-BY 6 5 d o r eP VCC 13 °C/W Max. 2.2 N.C. IN1 VCC OUT1OUT1+ D95AU261 ELECTRICAL CHARACTERISTICS (VCC = 11V, RL = 8Ω, f = 1kHz, Tamb = 25°C unless otherwise specified.) Symbol VCC Iq VOS PO THD Parameter Supply Range Total Quiescent Current Output Offset Voltage Output Power Total Harmonic Distortion 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 2/8 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 4.5 5 0.05 40 46 60 25 56 60 80 150 26 25 2.3 VCC/2 -1 30 2.9 VCC/2 -0.75 Max. 18 60 120 0.2 1 27 0.5 4.1 VCC/2 -0.5 Unit V mA mV W % % dB dB dB °C dB dB KΩ V V TDA7266S ELECTRICAL CHARACTERISTICS (Continued) Symbol VTST-BY IST-BY eN Parameter St-by Threshold ST-BY current V6 = GND Total Output Noise Voltage Test Condition ) s t( c u d e t le t c u od let µP so Ob S-GND IN2 MUTE R2 10K + ) s t( c u d o r P e et 1 C5 470µF OUT1+ 2 OUT1- 15 OUT2+ 14 OUT2- 13 C6 100nF - 9 Vref C3 0.22µF 3 o r P VCC l o bs O ) 7 s ( t c u d o r eP t e ol bs O r P e C2 10µF (s) -O 4 Unit V µA µV 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. o s b C1 0.22µF Max. 1.8 100 150 Figure 1: Microprocessor Application ST-BY R1 10K Typ. 1.3 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 IN1 Min. 0.8 12 + + - 6 C4 1µF PW-GND 8 + D95AU258A 3/8 TDA7266S Figure 2: Microprocessor Driving Signals. +VS(V) +18 VIN (mV) ) s t( VST-BY pin 7 1.8 c u d 1.3 0.8 e t le VMUTE pin 6 4.1 o s b 2.9 -O 2.3 (s) Iq (mA) od r P e t e l o VOUT (V) t c u c u d o r P e et O ) 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 4/8 ) s t( s ( t c u d o r eP s b t O e l o s b O l o bs o r P 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. TDA7266S Figure 3a: Stand-alone Low-cost Application. VCC Vs C3 0.22µF R1 47K 13 + IN1 ST-BY R2 47K 3 4 1 C1 470µF OUT1+ C2 100nF 7 C4 10µF S-GND C5 0.22µF ct + 15 - e t le o r P o s b 6 (s) OUT1- + IN2 PW-GND 2 - 12 MUTE c u d 9 Vref -O 8 l o bs u d ) o r s ( t P c e u t d e l o r o s P b e t O e l o s b O - ) s t( ) s t( OUT2+ c u d o r P e et 14 OUT2- + -O D95AU260B Figure 3b: PCB and Component Layout of the Application Circuit (Fig. 1). 5/8 TDA7266S Figure 4: Distortion vs Frequency Figure 5: Gain vs Frequency THD(%) Level(dBr) 10 5.0000 4.0000 1 Vcc = 11V Rl = 8 ohm Pout = 1W 3.0000 V cc = 11 V Rl = 8 o hm 2.0000 1.0000 0.0 -1.000 P ou t = 100 m W 0.1 -2.000 -3.000 P ou t = 2W -4.000 0.0 10 100 1k 10k 10 100 1k t c u d o r eP Attenuation (dB) 0 -10 -20 ) (s -30 -40 -50 -80 t c u od -90 -100 1 1.5 Pr 2 2.5 3 3.5 4 Vpin.6(V) e t e l c u d 10 0 -10 -20 -30 -40 -50 -60 -70 -80 -90 -100 -110 -120 4.5 l o bs O ) t(s 5 Figure 8: Quiescent Current vs. Supply Voltage Ob let o s Ob Iq (mA) 70 65 60 55 50 45 40 35 30 3 4 5 6 7 8 9 10 11 12 Vsupply(V) 6/8 13 14 15 16 17 t e l o ) s t( 18 c u d o r Attenuation (dB) s b O o r eP so 100k Figure 7: Stand-By Attenuation vs Vpin.7 10 -70 10k frequency (Hz) Figure 6: Mute Attenuation vs. V pin.6 -60 ) s ( -5.000 20k frequency (Hz) 0 0.2 0.4 P e et 0.6 0.8 1 1.2 1.4 Vpin.7 (V) 1.6 1.8 2 2.2 2.4 TDA7266S mm DIM. MIN. TYP. inch MAX. MIN. TYP. 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 OUTLINE AND MECHANICAL DATA MAX. 20.2 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 0.114 M 4.25 4.55 4.85 0.167 0.179 0.191 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 t c u t e l o e t le o s b -O (s) od c u d 0.713 M1 r P e ) s t( 0.795 21.9 l o bs o r P ) s t( c u d o r P e et Multiwatt15 V O ) s ( t c u d s b t O e l o s b O o r eP 7/8 TDA7266S ) s t( c u d e t le o s b (s) -O od t c u r P e t e l o l o bs o r P ) s t( c u d o r P e et O ) s ( t c u d s b t O e l o s b O o r eP 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. 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