TDA7268 2 x 2W STEREO AUDIO AMPLIFIER WIDE OPERATING RANGE FROM 4.5V TO 18V POUT = 2W @ THD 10% 12V/8Ω INTERNAL FIXED GAIN 32dB NO FEEDBACK CAPACITOR NO BOUCHEROT CELL THERMAL PROTECTION AC SHORT CIRCUIT PROTECTION SVR CAPACITOR FOR BETTER RIPPLE REJECTION LOW TURN-ON/OFF POP VERY FEW EXTERNAL COMPONENTS STAND-BY MODE (IST-BY < 300µA) DESCRIPTION The device TDA7268 is a new technology stereo Audio Amplifier in DIP package specially de- POWERDIP (8+8) ORDERING NUMBER: TDA7268 signed for TV application. Thanks to the fully complementary output configuration the device delivers a rail to rail voltage swing without need of boostrap capacitor. BLOCK DIAGRAM 1 IN1 4 + 2 - 8 IN2 5 + 7 - SVR OUT1 VS2 OUT2 3 6 S-GND March 1998 VS1 9÷16 P-GND D94AU167B 1/5 TDA7268 ABSOLUTE MAXIMUM RATINGS Symbol Parameter VS IO Operating Supply Voltage Output Peak Current Top Tj Operating Temperature Range Junction Temperature Storage Temperature Range Tstg Value Unit 18 1.5 V A 0 to 70 °C 150 -40 to 125 °C °C PIN CONNECTION VS1 1 16 PGND OUT1 2 15 PGND SVR 3 14 PGND IN1 4 13 PGND IN2 5 12 PGND S-GND 6 11 PGND OUT2 7 10 PGND VS2 8 9 PGND D94AU164A THERMAL DATA Symbol Parameter Rth j-amb Rth j-case Value Unit Thermal Resistance Junction to ambient (on PCB) Max. 70 °C/W Thermal Resistance Junction to case Max. 15 °C/W THERMAL RESISTANCE JUNCTION TO AMBIENT(˚C/W) Rth with "on Board" Square Heat Sink vs. Copper Area D98AU830 54 52 50 48 46 44 42 40 38 36 34 0 2 4 6 8 10 ON BOARD HEAT-SINK AREA (sq.cm) 2/5 12 Example of heatsink using PC board copper TDA7268 ELECTRICAL CHARACTERISTICS (Tamb = 25°C; VS = 12V; RL = 8Ω; f = 1KHz; unless otherwise specified.) Symbol Parameter VS IS Supply Voltage Range Isb VO Stand-By Current AV ∆AV RIN PO THD SVR Test Condition Typ. 4.5 V 60 mA 0.15 0.3 mA 5.5 31 6 32 6.5 33 V dB 50 100 Voltage Gain Matching 1.0 Input Impedance Output Power THD = 10% Distortion Supply Voltage Rejection PO = 1W Vrip. = 150mVrms; Frip. = 1KHz RS = 10kΩ RS = 50Ω Rg = 10KΩ; BW = 20Hz to 20KHz CT Cross Talk PO = 1W; Vsb Asb PO Stand-By Enable Voltage Stand-By Attenution Output Power ISB < 300µA 1.9 40 50 W 0.4 50 46 4 % dB dB 8 60 µV dB 1 80 1.8 dB KΩ 2 0.1 60 THD = 10%; VS = 9V; RL = 4Ω Unit 40 Pin 3 shorted to GND Quiescent Output Voltage Voltage Gain Max. 18 Quiescent Current Total Input Noise Voltage en Min. V dB W 3/5 TDA7268 Fig. 1: Standard Test and Application Circuit 1 C1 0.1µF IN1 IN1 VS1 VS=12V C4 100µF 4 + 2 OUT1 - R1 10K C5 470µF 8Ω C2 0.1µF IN2 IN2 5 + VS2 7 OUT2 C6 470µF - R2 10K SVR S1 STAND-BY 8 3 C3 47µF 8Ω 6 S-GND 9÷16 P-GND D94AU168D Note: Add R1 & R2 on demoboard only for DC tests. Fig. 2: PCB And Components Layout Of The Application Circuit of Figure 1 APPLICATION HINTS: For 12V supply and 8Ω speaker application, its maximum power dissipation is about 2W. Assumming that max ambient temperature is 70°C. Required thermal resistance of the device and heat dissipating means must be equal to (150 4/5 - 70)/2 = 40°C/W. Junction to pin thermal resistance of the package is about 15°C/W. That means external heat sink of about 25°C/W is required. Stand-By switches must be able to discharge Csvr current. TDA7268 DIP16 PACKAGE MECHANICAL DATA mm DIM. MIN. a1 0.51 B 0.77 TYP. inch MAX. MIN. TYP. MAX. 0.020 1.65 0.030 0.065 b 0.5 0.020 b1 0.25 0.010 D 20 0.787 E 8.5 0.335 e 2.54 0.100 e3 17.78 0.700 F 7.1 0.280 I 5.1 0.201 L Z 3.3 0.130 1.27 0.050 5/5 TDA7268 Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics 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 SGS-THOMSON Microelectronics. Specification mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. SGS-THOMSON Microelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of SGS-THOMSON Microelectronics. © 1998 SGS-THOMSON Microelectronics – Printed in Italy – All Rights Reserved SGS-THOMSON Microelectronics GROUP OF COMPANIES Australia - Brazil - Canada - China - France - Germany - Italy - Japan - Korea - Malaysia - Malta - Morocco - The Netherlands Singapore - Spain - Sweden - Switzerland - Taiwan - Thailand - United Kingdom - U.S.A. 6/5