TDA7266 – 7+7W DUAL BRIDGE AMPLIFIER

Part Number : TDA7266

Function : 7+7W DUAL BRIDGE AMPLIFIER

Manufactures : ST Microelectronics

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Description :

® 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 DESCRIPTION The TDA7266 is a dual bridge amplifier specially designed for TV and Portable Radio applications. TECHNOLOGY BI20II Multiwatt 15 ORDERING NUMBER: TDA7266 BLOCK AND APPLICATION DIAGRAM 0.22µF IN1 ST-BY 4 7 VCC 3 13 470µF + 1 OUT1+ – 100nF S-GND 9 Vref 0.22µF IN2 12 MUTE 6 – 2 OUT1+ + 15 OUT2+ – March 2002 PW-GND 8 – 14 OUT2+ D94AU175B 1/9 TDA7266 ABSOLUTE MAXIMUM RATINGS Symbol VS IO Ptot Top Tstg, Tj Parameter Supply Voltage Output Peak Current (internally limited) Total Power Dissipation (Tcase = 70°C) Operating Temperature Storage and Junction Temperature THERMAL DATA Symbol Description Rth j-case Thermal Resistance Junction to case PIN CONNECTION (Top view) Value 20 2 33 0 to 70 -40 to +150 Unit V A W °C °C Value Typ. 1.4 Max. 2 Unit °C/W 15 OUT2+ 14 OUT213 VCC 12 IN2 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 OUT11 OUT1+ 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 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 6.3 Typ. 11 50 7 0.05 Max. 18 65 120 0.2 1 Unit V mA mV W % % 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 dB dB dB °C dB dB KΩ V V 2/9 ELECTRICAL CHARACTERISTICS (Continued) Symbol VTST-BY IST-BY eN Parameter St-by Threshold ST-BY current V6 = GND Total Output Noise Voltage Test Condition A curve f = 20Hz to 20kHz TDA7266 Min. 0.8 Typ. 1.3 150 Max. 1.8 100 Unit V µA µV 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 necessar [...]

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TDA7266 Datasheet


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