Datasheet

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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.

March 2002

Vref

ST-BY 7

IN1

0.22µF

133

D94AU175B

OUT1+

OUT1-

MUTE 6

IN2

0.22µF

OUT2+

OUT2-

S-GND

PW-GND

470µF 100nF

BLOCK AND APPLICATION DIAGRAM

Multiwatt 15

ORDERING NUMBER:

TDA7266

TECHNOLOGY BI20II

1/9

Summary of content (9 pages)

PAGE 1
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 TECHNOLOGY BI20II Multiwatt 15 ORDERING NUMBER: TDA7266 DESCRIPTION The TDA7266 is a dual bridge amplifier specially designed for TV and Portable Radio applications. BLOCK AND APPLICATION DIAGRAM VCC 470µF 3 0.
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TDA7266 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) 33 W 0 to 70 °C -40 to +150 °C Value Unit Top Tstg, Tj Operating Temperature Storage and Junction Temperature THERMAL DATA Symbol Rth j-case Description Thermal Resistance Junction to case Typ. 1.4 Max. 2 °C/W PIN CONNECTION (Top view) 15 OUT2+ 14 OUT2- 13 VCC 12 IN2 11 N.C. 10 N.C.
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TDA7266 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).
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TDA7266 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.
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TDA7266 Figure 3a: Stand-alone Low-cost Application. VCC VCC C3 0.22µF R1 47K + IN1 ST-BY R2 47K 3 4 1 C1 470µF OUT1+ 2 OUT1- 15 OUT2+ 14 OUT2- 13 C2 100nF 7 C4 10µF S-GND 9 Vref C5 0.22µF 12 IN2 + + - MUTE PW-GND 6 8 + D95AU260A Figure 3b: PCB and Component Layout of the Application Circuit (Fig. 1).
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TDA7266 Figure 4: Distortion vs Output Power Figure 5: 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 f = 1 KH z 0.010 0.1 0.0 10 1 10 0.1 1 10 Po u t (W ) P ou t (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 V cc = 11 V Rl = 8 o hm 2.0000 1.0000 0.0 -1.
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TDA7266 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.
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TDA7266 mm DIM. MIN. TYP. inch MAX. MIN. TYP. MAX. A 5 0.197 B 2.65 0.104 C 1.6 0.063 D 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 20.2 0.795 L 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.
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TDA7266 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.