TDA7262

TDA7262 ® 20+20W STEREO AMPLIFIER WITH STAND-BY WIDE SUPPLY VOLTAGE RANGE HIGH OUTPUT POWER 28+28W TYP. MUSIC POWER 20+20W @ THD = 10%, RL = 4Ω, VS = 28V HIGH CURRENT CAPABILITY (UP TO 3.5A) STAND-BY FUNCTION AC SHORT CIRCUIT PROTECTION THERMAL OVERLOAD PROTECTION DESCRIPTION The TDA7262 is class AB dual Hi-Fi Audio power amplifier assembled in Multiwatt package, specilally designed for high quality stereo application as Hi-Fi music centers and TV sets. c u d Figure 1: Stereo Application Circuit with Stand-By e t le ) s ( ct ) s t( MULTIWATT11 ORDERING NUMBER: TDA7262 o r P o s b O - u d o r P e t e l o s b O September 2003 1/8 TDA7262 ABSOLUTE MAXIMUM RATINGS Symbol Parameter Value Unit V VS Supply Voltage 35 IO Output Peak Current (repetitive f > 20Hz) 3.5 A IO Output Peak Current (non repetitive, t > 100µs) 4.5 A Power Dissipation (Tcase = 70°C) Ptot Tstg, Tj Storage and Junction Temperature 30 W -40 to 150 °C PIN CONNECTION c u d e t le TEST CIRCUIT ) s ( ct u d o r P e t e l o s b O 2/8 o s b O - o r P ) s t( TDA7262 THERMAL DATA Symbol Rth j-case Description Thermal Resistance Junction-case Max Value Unit 2.5 °C/W ELECTRICAL CHARACTERISTICS (Refer to the stereo test circuit, VS = 28V; f = 1KHz; Tamb = 25°C, unless otherwise specified) Symbol Parameter Test Condition Min. Typ. 8 Max. Unit VS Supply Voltage 32 V VO Quiescent Output Voltage VS = 32V 15.5 V Id Total Quiescent Current VS = 28V VS = 32V 65 70 120 mA mA PO Output Power (each channel) Music Power STD rules (T = 1s) VS = 32V; d = 10%; RL = 4Ω 28 d = 10% RL = 4Ω RL = 8Ω 22 13 10 d = 1% RL = 4Ω RL = 8Ω d Total Harmonic Distortion CT f = 100Hz to 10KHz PO = 0.1 to 14W; RL = 4Ω PO = 0.1 to 8W; RL = 8Ω Cross Talk RL = 4Ω RS = 100Ω f = 1KHz f = 10KHz e t le so b O - Vi Input Saturation Voltage (Vrms) Ri Input Resistance f = 1KHz; non inverting Input W c u d ) s t( 18 10 W W 0.2 0.1 % % 60 50 dB dB 200 KΩ o r P 300 70 W W mV fL Low Frequency roll-off (-3dB) RL = 4Ω 40 Hz fH High Frequency roll-off (-3dB) RL = 4Ω 80 KHz GV Closed Loop Voltage Gain f = 1KHz ∆GV Closed Loop Gain match eN Total Input Noise Voltage SVR ) s ( ct u d o r P e Supply Voltage Rejection (each channel) t e l o Tj s b O 35.5 36 36.5 0.5 dB dB µV A Curve; RS = 10KΩ 1.5 f = 22Hz to 22KHz; RS = 10KΩ 2.5 RS = 0 to 10KΩ; fr = 100Hz Vr = 0.5V 55 dB 145 °C Thermal Shutdown Junction Temperature 8 µV STAND-BY FUNCTION V3 Stand-By Threshold VS = 32V AM IM Stand-By Attenuation Stand-By Quiescent Current VS = 32V; V3 < 0.45V VS = 32V; V3 < 0.45V 0.45 0.9 V 60 100 3 dB mA 5 3/8 TDA7262 APPLICATION SUGGESTION The recommended values of the components are those shown on application circuit of Figure 1. Different values can be used; the following table can help the designer. Recomm. Value Component R1 and R3 1.3KΩ R2 and R4 18Ω R5 and R6 1Ω C1 and C2 2.2µF C3 Purpose Larger than 22µF (**) Close loop gain setting (*) Smaller than Increase of gain Decrease of gain Decrease of gain Increase of gain Frequency stability Danger of oscillations Input DC decoupling higher turn-on delay - worse turn-ON pop - higer low freq. cutoff. Increase of noise - Ripple rejection - Stand-by time constant Increase of the Switch-on time - Degradation of SVR - worse turn-OFF pop by stand-by C4 100nF Supply setting Danger of oscillations C5 1000µF Supply setting worse turn-OFF pop C6 and C7 220µF Feedback input DC decoupling C8 and C9 0.1µF Frequency stability Danger of oscillations Output DC decoupling Higher low-frequency cut-off C10 and C11 1000µF to 2200µF c u d (*) Closed loop gain must be higher than 26dB. (**) 220µF in case of stand-by utilization. e t le Figure 2: Ouput Power vs. Supply Voltage ) s ( ct u d o r P e t e l o s b O 4/8 o s b O - ) s t( o r P Figure 3: Ouput Power vs. Supply Voltage TDA7262 Figure 4: Distortion vs. Ouput Power Figure 5: Distortion vs. Ouput Power Figure 6: Quiescent Current vs. Supply Voltage Figure 7: Supply Voltage Rejection vs. Frequency c u d e t le ) s ( ct u d o r P e Figure 8: Output Attenuation vs. Vpin 3 ) s t( o r P o s b O - Figure 9: Total Power Dissipation & Efficiency vs. Output Power t e l o s b O 5/8 TDA7262 Figure 12 Figure 11: Total Power Dissipation & Efficiency vs. Output Power BUILD-IN PROTECTION SYSTEMS Thermal shut-down The presence of a thermal limiting circuit offers the following advantages: 1) an overload on the output (even if it is permanent), or an excessive ambient temperature can be easily withstood. 2) the heatsink can have a smaller factor of safety compared with that of a conventional circuit. There is no device damage in the case of excessive junction temperature; all that happens is that PO ( and therefore Ptot) and IO are reduced. The maximum allowable power dissipation depends upon the size of the external heatsink (i.e. its thermal resistance); Figure 12 shows this dissipable power as a function of ambient temperature for different thermal resistance. ) s ( ct u d o r P e t e l o s b O 6/8 c u d ) s t( Short circuit (AC Conditions) The TDA7262 can withstand accidental short circuits across the speaker made by a wrong connection during normal play operation. e t le o r P MOUNTING INSTRCTIONS The power dissipated in the circuit must be removed by adding an external heatsink. Thanks to the MULTIWATT package attaching the heatsink is very simple, a screw or a compression spring (clip) being sufficient. between the heatsink and the package it is better to insert a layer of silicon grease, to optimize the thermal contact; no electrical isolation is needed between the two surfaces. o s b O - TDA7262 mm DIM. MIN. TYP. inch MAX. MIN. TYP. MAX. A 5 0.197 B 2.65 0.104 C 1.6 D OUTLINE AND MECHANICAL DATA 0.063 1 0.039 E 0.49 0.55 0.019 0.022 F 0.88 0.95 0.035 0.037 G 1.45 1.7 1.95 0.057 0.067 0.077 G1 16.75 17 17.25 0.659 0.669 0.679 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 0.87 0.886 L2 17.4 18.1 0.685 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 0.713 L7 2.65 2.9 0.104 M 4.25 4.55 4.85 0.167 0.179 0.191 M1 4.73 5.08 5.43 0.186 0.200 0.214 S 1.9 2.6 0.075 0.102 S1 1.9 2.6 0.075 0.102 Dia1 3.65 3.85 0.144 0.152 c u d 0.114 ) s ( ct ) s t( o r P Multiwatt11 V e t le o s b O - u d o r P e t e l o s b O 7/8 TDA7262 c u d e t le ) s ( ct ) s t( o r P o s b O - u d o r P e t e l o s b O 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. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics. The ST logo is a registered trademark of STMicroelectronics. All other names are the property of their respective owners © 2003 STMicroelectronics - All rights reserved STMicroelectronics GROUP OF COMPANIES Australia – Belgium - Brazil - Canada - China – Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan Malaysia - Malta - Morocco - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States www.st.com 8/8