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 ORDERING NUMBER: TDA7266L DESCRIPTION The TDA7266L is a mono bridge amplifier specially designed for TV and Portable Radio applications. BLOCK AND APPLICATION DIAGRAM VCC C1 0.22µF 7 IN1 5V S1 R1 ST-BY S-GND MUTE February 2001 + 10 OUT+ 9 OUT- C6 100nF 4 C2 (ST-BY) S2 C5 470µF 8 R2 MUTE C4 6 3 Vref + 5 PW-GND D99AU1039A 1/7 TDA7266L ABSOLUTE MAXIMUM RATINGS Symbol Parameter Value Unit V VS Supply Voltage 20 IO Ptot Output Peak Current (internally limited) 2 A Total Power Dissipation (Tcase = 70°C) 10 W 0 to 70 °C -40 to +150 °C Top Tstg, Tj Operating Temperature Storage and Junction Temperature THERMAL DATA Symbol Description Rth j-case Thermal Resistance Junction to case Rth j-amb Thermal Resistance Junction to ambient Value Unit 8 °C/W 70 °C/W PIN CONNECTION (Top view) 10 OUT+ 9 OUT- 8 VCC 7 IN 6 S-GND 5 PW-GND 4 ST-BY 3 MUTE 2 N.C. 1 N.C. D99AU1040A 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 AMUTE TW GV Ri VTMUTE Supply Voltage Rejection Mute Attenuation Thermal Threshold Closed Loop Voltage Gain Input Resistance Mute Threshold 2/7 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. 3.5 Typ. 10 35 5.5 7 0.05 40 60 31 2.3 VCC/2 -1 Max. 18 50 120 0.2 1 50 80 150 32 2.9 VCC/2 -0.75 33 4.1 VCC/2 -0.5 Unit V mA mV W % % dB dB °C dB KΩ V V 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 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. Typ. 1.3 150 Max. 1.8 100 Unit V µA µV 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 µP 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. Figure 1: 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 3/7 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 Figure 4: Distortion vs Output Power TH D (% ) T H D (% ) 10 10 V cc = 11 V R l = 8 ohm V cc = 9V Rl= 8 o h m 1 1 f = 15 K H z 0.1 f = 1 5K H z 0.1 f = 5 KH z f = 5 K Hz f = 1 KHz 0.010 0.1 f = 1 KH z 0.0 10 1 P ou t (W ) 4/7 10 0.1 1 Po u t (W ) 10 TDA7266L Figure 5: Distortion vs Frequency Figure 6: 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 20k -5.000 10 100 1k frequency (Hz) Figure 7: Mute Attenuation vs. V pin.6 Attenuation (dB) 10 0 -10 -20 -30 -40 -50 -60 -70 -80 -90 -100 -110 -120 0 -10 -20 -30 -40 -50 -60 -70 -80 -90 1 1.5 2 2.5 3 100k Figure 8: Stand-By Attenuation vs Vpin.7 10 -100 10k frequency (Hz) 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 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) 5/7 TDA7266L mm DIM. MIN. inch TYP. A MAX. MIN. TYP. 7.1 a1 2.7 3 B 0.280 0.106 0.118 24.8 b1 0.976 0.5 b3 0.020 0.85 1.6 0.033 0.063 C 3.3 0.130 c1 0.43 0.017 c2 1.32 D 0.052 23.7 d1 0.933 14.5 0.571 e 2.54 0.100 e3 22.86 0.900 L OUTLINE AND MECHANICAL DATA MAX. 3.1 0.122 L1 3 0.118 L2 17.6 L3 0.693 0.25 L4 0.010 0.254 M 3.2 N 1 0.010 0.126 SIP10 0.039 P 0.15 0.006 C D L1 L3 c2 N P 1 0 1 L L4 a1 L2 A d1 M b1 b3 e 1 c e3 B SIP10 6/7 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. 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