ST TDA7266SA Dual Bridge Amplifier Data Sheet

Summary

The TDA7266SA is a high-performance dual bridge amplifier designed for professional audio applications, including LCD monitors, PC motherboards, TVs, and portable radio systems. This manual provides comprehensive technical details on its operation, covering wide voltage compatibility (3.5–18V), robust protection mechanisms like thermal overload and short circuit defense, and integrated standby/mute functions. Engineers developing embedded audio solutions will find detailed electrical characteristics and application diagrams vital for reliable design and noise-free performance.

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TDA7266SA

7W+7W DUAL BRIDGE AMPLIFIER

WIDE SUPPLY VOLTAGE RANGE (3.5-18V)

TECHNOLOGY BI20II

MINIMUM EXTERNAL COMPONENTS NO SWR CAPACITOR NO BOOTSTRAP NO BOUCHEROT CELLS INTERNALLY FIXED GAIN STAND-BY & MUTE FUNCTIONS SHORT CIRCUIT PROTECTION

CLIPWATT15

THERMAL OVERLOAD PROTECTION

ORDERING NUMBER: TDA7266SA

DESCRIPTION The TDA7266SA is a dual bridge amplifier specially

Pin to pin compatible with: TDA7266S, TDA7266,

designed for LCD Monitor, PC Motherboard, TV and

TDA7266M, TDA7266MA, TDA7266B, TDA7297SA

Portable Radio applications.

& TDA7297.

BLOCK AND APPLICATION DIAGRAM

IN1 OUT1+

ST-BY

S-GND

OUT1-

IN2 OUT2+

OUT2-

PW-GND

D94AU175B

September 2003 1/11

Page Summary Contents For ST TDA7266SA Dual Bridge Amplifier Data Sheet

Page 1 TDA7266SA 7W+7W DUAL BRIDGE AMPLIFIER WIDE SUPPLY VOLTAGE RANGE (3.5-18V) TECHNOLOGY BI20II MINIMUM EXTERNAL COMPONENTS NO SWR CAPACITOR NO BOOTSTRAP NO BOUCHEROT CELLS INTERNALLY FIXED GAIN STAND-BY ...

Page 2 TDA7266SA ABSOLUTE MAXIMUM RATINGS Symbol Parameter Value Unit Vs Supply Voltage IO Output Peak Current (internally limited) Ptot Total Power Dissipation (Tamb = 70°C) Operating Temperature 0 to 70 °C...

Page 3 TDA7266SA ELECTRICAL CHARACTERISTCS (continued) (VCC = 11V, RL = 8Ω, f = 1KHz, Tamb = 25°C unless otherwise specified) Symbol Parameter Test Condition Min. Typ. Max. Unit Ri Input Resistance KΩ VTMUTE...

Page 4 TDA7266SA Figure 2. Microprocessor Driving Signals +VS(V) VIN (m V) VST-BY pin 7 1.8 VMUTE pin 6 Iq (m A) VOUT (V) PLAY MUTE ST-BY OFF ST-BY D96AU259mod B) Low Cost Application In low cost application...

Page 5 TDA7266SA Figure 3. Stand-alone low-cost Application R1 IN1 OUT1+ ST-BY S-GND OUT1- OUT2+ OUT2- PW-GND D95AU260A Figure 4. Distortion vs Frequency Figure 5. Gain vs Frequency THD(%) Level(d B r) 5.000...

Page 6 TDA7266SA Figure 6. Mute Attenuation vs Vpin.8 Figure 8. Quiescent Current vs Supply Voltage Attenuation (d B) Iq (m A) Vsupply(V) Vpin .6(V) Figure 7. Stand-By attenuation vs Vpin 9 Attenuation (d B)...

Page 7 TDA7266SA Figure 9. PC Board Component Layout Figure 10. Evaluation Board Top Layer Layout Figure 11. Evaluation Board Bottom Layer Layout

Page 8 TDA7266SA HEAT SINK DIMENSIONING: In order to avoid the thermal protection intervention, that is placed approximatively at Tj = 150°C, it is important the dimensioning of the Heat Sinker RTh (°C/W). T...

Page 9 TDA7266SA Clipwatt Assembling Suggestions The suggested mounting method of Clipwatt on external heat sink, requires the use of a clip placed as much as possible in the plastic body center, as indicate...

Page 10 TDA7266SA mm inch OUTLINE AND MIN. TYP. MAX. MIN. TYP. MAX. MECHANICAL DATA 0.15 0.006 Weight: 1.92gr Clipwatt15

Page 11 TDA7266SA 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 ...

Manual Details

Brand	Dual
Pages	11
File Size	524.14 KB
Published	June 03, 2026

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Frequently Asked Questions

What is the recommended operating temperature range for this amplifier?

The typical operating temperature (T amb) is 0 to 70 °C.

How does the device prevent loud 'Pop' Noise during startup or shutdown?

It requires a proper St-by and mute signal sequence, often utilizing an external RC network or delay timers (100-200ms).

What is the maximum power dissipation when operating at 70°C?

The total maximum power dissipation (P tot amb) is 20 W.

Is this amplifier compatible with older TDA series models?

Yes, it is pin to pin compatible with TDA7266S, TDA7266, and designed for use with TDA7297.