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| (R) TDA7265 25 +25W STEREO AMPLIFIER WITH MUTE & ST-BY WIDE SUPPLY VOLTAGE RANGE (UP TO 25V ABS MAX.) SPLIT SUPPLY HIGH OUTPUT POWER 25 + 25W @ THD =10%, RL = 8, VS = +20V NO POP AT TURN-ON/OFF MUTE (POP FREE) STAND-BY FEATURE (LOW Iq) SHORT CIRCUIT PROTECTION THERMAL OVERLOAD PROTECTION DESCRIPTION The TDA7265 is class AB dual Audio power amplifier assembled in the Multiwatt package, specially designed for high quality sound application as Hi-Fi music centers and stereo TV sets. Figure 1: Typical Application Circuit Multiwatt11 ORDERING NUMBER: TDA7265 +VS 1000F MUTE/ ST-BY IN (L) 1F 3 15K 1F 5 7 + - 4 OUT (L) 18K 4.7 100nF 560 8 15K +5V P 18K GND 9 10 IN- (L) RL (L) IN- (R) 560 18K 1F IN (R) 11 + 1 6 -VS 1000F 2 OUT (R) 4.7 100nF RL (R) D94AU085 July 1998 1/11 TDA7265 ABSOLUTE MAXIMUM RATINGS Symbol VS IO Ptot Top Tstg, Tj DC Supply Voltage Output Peak Current (internally limited) Power Dissipation T case = 70C Operating Temperature Storage and Junction Temperature Parameter Value 25 4.5 30 -20 to 85 -40 to +150 Unit V A W C C PIN CONNECTION (Top view) 11 10 9 8 7 6 5 4 3 2 1 IN+(1) IN-(1) GND IN-(2) IN+(2) -VS MUTE OUTPUT(2) +VS OUTPUT(1) -VS TAB CONNECTED TO PIN 6 D95AU316 THERMAL DATA Symbol Rth j-case Description Thermal Resistance Junction-case Max Value 2 Unit C/W 2/11 TDA7265 ELECTRICAL CHARACTERISTICS (Refer to the test circuit, VS = + 20V; RL = 8; RS = 50; GV = 30dB; f = 1KHz; Tamb = 25C, unless otherwise specified.) Symbol VS Iq VOS Ib PO PO Parameter Supply Range Total Quiescent Current Input Offset Voltage Non Inverting Input Bias Current Music Output Power (*) Output Power THD = 10%; RL = 8 ; VS = + 22.5V THD = 10% R L = 8 ; VS + 16V; RL = 4 THD = 1% R L = 8 ; VS + 16V; RL = 4 THD Total Harmonic Distortion RL = 8 ; PO = 1W; f = 1KHz R L = 8 ; PO = 0.1 to 15W; f = 100Hz to 15KHz R L = 4 ; PO = 1W; f = 1KHz R L = 4 ; VS + 16V; PO = 0.1 to 12W; f = 100Hz to 15KHz CT SR GOL eN Ri SVR Tj Cross Talk Slew Rate Open Loop Voltage Gain Total Input Noise Input Resistance Supply Voltage Rejection (each channel) Thermal Shut-down Junction Temperature Mute / Play Threshold Mute Attenuation Stand-by / Mute Threshold Stand-by Attenuation Quiescent Current @ Stand-by -7 60 -3.5 fr = 100Hz Vr = 0.5V A Curve f = 20Hz to 22KHz 15 f = 1KHz f = 10KHz 70 60 10 80 3 4 20 60 145 8 0.02 1 20 -20 500 32 Test Condition Min. +5 80 Typ. Max. +25 130 +20 Unit V mA mV nA W 25 25 20 20 0.01 0.7 W W W W % % % % dB dB V/s dB V V K dB C MUTE FUNCTION [ref: +VS] VTMUTE AM VTST-BY AST-BY Iq ST-BY -6 70 -2.5 110 3 -1.5 -5 V dB V dB mA STAND-BY FUNCTION [ref: +VS] Note : (*) FULL POWER up to. VS = 22.5V with RL = 8 and VS = 16V with RL = 4 MUSIC POWER is the maximal power which the amplifier is capable of producing across the rated load resistance (regardless of non linearity) 1 sec after the application of a sinusoidal input signal of frequency 1K Hz. 3/11 TDA7265 Figure 2: Quiescent Current vs. Supply Voltage Figure 3: Frequency Response Figure 4: Output Power vs. Supply Voltage Figure 5: T.H.D. vs. Output Power Figure 6: Output Power vs. Supply Voltage Figure 7: T.H.D. vs. Output Power 4/11 TDA7265 Figure 8: Quiescent Current vs. Pin # 5 Voltage Figure 9: Attenuation vs. Pin # 5 Voltage Figure 10: SVR vs. Frequency Figure 11: Crosstalk vs. Frequency Figure 12: Power Dissipaton vs. Output Power Figure 13: Power Dissipaton vs. Output Power 5/11 TDA7265 MUTE STAND-BY FUNCTION The pin 5 (MUTE/STAND-BY) controls the amplifier status by two different thresholds, referred to +VS. - When Vpin5 higher than = +VS - 2.5V the amplifier is in Stand-by mode and the final stage generators are off Figure 14 +VS (V) 20 - when Vpin5 is between +VS - 2.5V and +VS - 6V the final stage current generators are switched on and the amplifier is in mute mode - when Vpin5 is lower than +VS - 6V the amplifier is play mode. t -VS -20 VIN (mV) Vpin5 (V) VS VS-2.5 VS-6 VS-10 Iq (mA) 0 VOUT (V) OFF STDBY MUTE 6/11 PLAY STDBY PLAY OFF STDBY D94AU086 MUTE MUTE MUTE TDA7265 Figure 15: Test and Application Circuit (Stereo Configuration) +VS C4 C5 R2 C3 MUTE/ ST-BY IN (L) C1 +V S 5 7 + 8 3 R1 SW1 ST-BY DZ Q1 4 OUT (L) R5 IN- (L) R6 R7 C8 RL (L) R4 SW2 MUTE R3 GND 9 10 IN- (R) R8 R9 C2 IN (R) 11 + 1 6 -VS C7 2 OUT (R) R10 C9 RL (R) C6 D94AU087B Figure 16: PC Board and Components Layout of the figure 15 (1:1 scale) 7/11 TDA7265 APPLICATIONS SUGGESTION (Demo Board Schematic) The recommended values of the external compoCOMPONENTS R1 R2 R3 R4 R5, R8 R6, R9 R7, R10 C1, C2 C3 C4, C6 C5, C7 C8, C9 Dz Q1 RECOMMENDED VALUE 10K 15K 18K 15K 18K 560 4.7 1F 1F 1000F 0.1F 0.1F 5.1V BC107 PURPOSE Mute Circuit Mute Circuit Mute Circuit Mute Circuit Closed Loop Gain Setting (*) Frequency Stability Input DC Decoupling St-By/Mute Time Constant Supply Voltage Bypass Supply Voltage Bypass Frequency Stability Mute Circuit Mute Circuit Larger On/Off Time nents are those shown are the demo board schematic different values can be used: the following table can help the designer. LARGER THAN RECOMMENDED VALUE Increase of Dz Biasing Current Vpin # 5 Shifted Downward Vpin # 5 Shifted Upward Vpin # 5 Shifted Upward Increase of Gain Decrease of Gain Danger of Oscillations Danger of Oscillations Higher Low Frequency Cutoff Smaller On/Off Time Danger of Oscillations Danger of Oscillations Vpin # 5 Shifted Upward Vpin # 5 Shifted Downward Vpin # 5 Shifted Downward SMALLER THAN RECOMMENDED VALUE (*) Closed loop gain has to be => 25dB MUTE, STAND-BY TRUTH TABLE SW1 B B A A SW2 A B A B STAND-BY STAND-BY MUTE PLAY 8/11 TDA7265 BRIDGE APPLICATION Another application suggestion concerns the BRIDGE configuration, where the two power amplifiers are connected as shown by the schematic diagram of figure. 17. This application shows, however, some operative limits due to dissipation and current capability of the output stage. For this reason, we reccomend to use the TDA7265 in bridge with the supply voltage equal/lower than 16V when the load is 8; with higher loads (i.e.16), the amplifier can work correctly in the whole supply voltage range. The detected characteristics of T.H.D. vs Pout and Frequency Response are shown in fig.18 and fig.19. With R1=8, Vs=+/-16V the maximum output power obtainable is 50W at T.D.H.=10%. The quiescent current remains unchanged with respect to the stereo configuration (~80mA as typical at Vs=+/-16V). The last point to take into consideration concerns the short-circuit protection. As for the stereo application, the TDA7265 is fully protected against any kind of short-circuit ( between Out/Gnd, Out/+Vs and Out/-Vs). Figure 17: Bridge Application Circuit ST-BY/ MUTE C3 0.1F C1 IN 1F 5 7 + 8 3 4 R1 36K R2 560 R4 560 R3 36K C8 5.6nF C4 1000F R5 4.7 +VS C7 0.1F 9 RL 10 C2 11 + 1 6 2 1F R6 4.7 -VS C6 1000F C9 0.1F D94AU190 C5 0.1F Figure 18: Distortion vs. Output Power Figure 19: Frequency Response of the Bridge Applications 9/11 TDA7265 MULTIWATT11 PACKAGE MECHANICAL DATA DIM. A B C D E F G G1 H1 H2 L L1 L2 L3 L4 L7 M M1 S S1 Dia1 21.5 21.4 17.4 17.25 10.3 2.65 4.1 4.88 1.9 1.9 3.65 4.3 5.08 17.5 10.7 0.49 0.88 1.57 16.87 19.6 20.2 22.3 22.2 18.1 17.75 10.9 2.9 4.5 5.3 2.6 2.6 3.85 0.846 0.843 0.685 0.679 0.406 0.104 0.161 0.192 0.075 0.075 0.144 0.169 0.200 0.689 0.421 1.7 17 1 0.55 0.95 1.83 17.13 0.019 0.035 0.062 0.664 0.772 0.795 0.878 0.874 0.713 0.699 0.429 0.114 0.177 0.209 0.102 0.102 0.152 0.067 0.669 mm MIN. TYP. MAX. 5 2.65 1.6 0.039 0.022 0.037 0.072 0.674 MIN. inch TYP. MAX. 0.197 0.104 0.063 10/11 TDA7265 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. 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 (c) 1998 STMicroelectronics - Printed in Italy - All Rights Reserved STMicroelectronics GROUP OF COMPANIES Australia - Brazil - Canada - China - France - Germany - Italy - Japan - Korea - Malaysia - Malta - Mexico - Morocco - The Netherlands Singapore - Spain - Sweden - Switzerland - Taiwan - Thailand - United Kingdom - U.S.A. 11/11 |
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