TDA7265A

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 = 8Ω, VS = +20V NO POP AT TURN-ON/OFF MUTE (POP FREE) STAND-BY FEATURE (LOW Iq) SHORT CIRCUIT PROTECTION THERMAL OVERLOAD PROTECTION Multiwatt11 ORDERING NUMBER: TDA7265 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 in Split Supply +VS 15K 1000µF 1µF MUTE/ ST-BY IN (L) 7 +5V + 4 OUT (L) 8 IN- (L) - 1µF 15K 3 5 18K GND 4.7Ω 18K RL (L) 100nF 560Ω 9 µP 10 IN- (R) 560Ω 18K 1µF IN (R) 11 - 2 + 1 6 -VS OUT (R) 4.7Ω RL (R) 100nF 1000µF D94AU085 April 2002 1/11 TDA7265 ABSOLUTE MAXIMUM RATINGS Symbol Value Unit VS DC Supply Voltage Parameter ±25 V IO Ptot Output Peak Current (internally limited) Power Dissipation Tcase = 70°C 4.5 30 A W Top Operating Temperature -20 to 85 °C -40 to +150 °C Tstg, Tj Storage and Junction Temperature PIN CONNECTION (Top view) 11 IN+(1) 10 IN-(1) 9 GND 8 IN-(2) 7 IN+(2) 6 -VS 5 MUTE 4 OUTPUT(2) 3 +VS 2 OUTPUT(1) 1 -VS TAB CONNECTED TO PIN 6 D95AU316 THERMAL DATA Symbol Description Thermal Resistance Junction-case Rth j-case Value Unit 2 °C/W Max Fig 2: Typical Application Circuit in Single Supply +VS D1 5.1V R1 10K R3 15K C1 1µF C5 1000µF MUTE PLAY 5V 0 MUTE Q1 BSX33 R2 15K C2 100µF IN (L) 3 5 7 + 4 OUT (L) 8 IN- (L) - C3 1µF 9 C4 1µF IN (R) 11 C6 0.1µF C9 470µF R4 30K R5 1K + 2 IN- (R) R8 4.7Ω C7 0.1µF OUT (L) C10 470µF 10 1 6 GND OUT (R) R6 30K R7 1K R9 4.7Ω C8 0.1µF D96AU444A 2/11 OUT (R) TDA7265 ELECTRICAL CHARACTERISTICS (Refer to the test circuit, VS = + 20V; RL = 8Ω; RS = 50Ω; GV = 30dB; f = 1KHz; Tamb = 25°C, unless otherwise specified.) Symbol Parameter VS Iq Supply Range VOS Input Offset Voltage Test Condition Min. Total Quiescent Current Ib Non Inverting Input Bias Current PO Music Output Power (*) PO Output Power 80 –20 THD = 10%; RL = 8Ω ; VS = + 22.5V THD = 10% RL = 8Ω ; VS + 16V; RL = 4Ω 20 THD = 1% RL = 8Ω ; VS + 16V; RL = 4Ω THD Total Harmonic Distortion Typ. +5 RL = 8Ω ; PO = 1W; f = 1KHz Cross Talk SR GOL eN Ri SVR Tj 130 mA +20 mV 32 W 25 25 W W 20 20 W W 0.01 % 0.7 % 1 % 0.02 dB dB Slew Rate 10 V/µs Open Loop Voltage Gain 80 dB Total Input Noise f = 1KHz f = 10KHz % 70 60 A Curve f = 20Hz to 22KHz Input Resistance Supply Voltage Rejection (each channel) 15 fr = 100Hz Mute Attenuation 20 µV µV KΩ 60 dB 145 °C 3 4 Vr = 0.5V Thermal Shut-down Junction Temperature MUTE FUNCTION [ref: +VS] Mute / Play Threshold VTMUTE AM V nA RL = 4Ω ; VS + 16V; PO = 0.1 to 12W; f = 100Hz to 15KHz CT Unit +25 500 RL = 8Ω ; PO = 0.1 to 15W; f = 100Hz to 15KHz RL = 4Ω ; PO = 1W; f = 1KHz Max. -7 -6 60 70 -3.5 -2.5 8 -5 V dB STAND-BY FUNCTION [ref: +VS] VTST-BY Stand-by / Mute Threshold AST-BY Stand-by Attenuation Iq ST-BY Quiescent Current @ Stand-by -1.5 V 110 dB 3 mA Note : (*) FULL POWER up to. VS = ±22.5V with RL = 8Ω and VS = ±16V with RL = 4Ω 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 1KHz. 3/11 TDA7265 Figure 3: Quiescent Current vs. Supply Voltage Figure 4: Frequency Response Figure 5: Output Power vs. Supply Voltage Figure 6: T.H.D. vs. Output Power Figure 7: Output Power vs. Supply Voltage Figure 8: T.H.D. vs. Output Power 4/11 TDA7265 Figure 9: Quiescent Current vs. Pin # 5 Voltage Figure 10: Attenuation vs. Pin # 5 Voltage Figure 11: SVR vs. Frequency Figure 12: Crosstalk vs. Frequency Figure 13: Power Dissipaton vs. Output Power Figure 14: Power Dissipaton vs. Output Power 5/11 TDA7265 - 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. 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 15 +VS (V) 20 t -VS -20 VIN (mV) Vpin5 (V) VS VS-2.5 VS-6 VS-10 Iq (mA) 0 VOUT (V) OFF PLAY STDBY PLAY OFF STDBY STDBY MUTE 6/11 D94AU086 MUTE MUTE MUTE TDA7265 Figure 16: Test and Application Circuit (Stereo Configuration) +VS R2 C3 MUTE/ ST-BY Q1 R1 IN (L) SW1 ST-BY DZ 7 R3 + 4 OUT (L) 8 IN- (L) - GND C5 3 5 C1 R4 C4 +VS R5 R7 RL (L) C8 R6 9 SW2 MUTE 10 R9 IN- (R) R8 C2 IN (R) 11 - 2 OUT (R) + 1 R10 6 -VS C7 RL (R) C9 C6 D94AU087B Figure 17: 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 compo- 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 SMALLER THAN RECOMMENDED VALUE COMPONENTS RECOMMENDED VALUE R1 10KΩ Mute Circuit Increase of Dz Biasing Current R2 15KΩ Mute Circuit Vpin # 5 Shifted Downward Vpin # 5 Shifted Upward R3 18KΩ Mute Circuit Vpin # 5 Shifted Upward Vpin # 5 Shifted Downward R4 15KΩ Mute Circuit Vpin # 5 Shifted Upward Vpin # 5 Shifted Downward R5, R8 18KΩ Increase of Gain R6, R9 560Ω Closed Loop Gain Setting (*) R7, R10 4.7Ω Frequency Stability Danger of Oscillations C1, C2 1µF Input DC Decoupling C3 1µF St-By/Mute Time Constant C4, C6 1000µF Supply Voltage Bypass Danger of Oscillations C5, C7 0.1µF Supply Voltage Bypass Danger of Oscillations C8, C9 0.1µF Frequency Stability Dz 5.1V Mute Circuit Q1 BC107 Mute Circuit PURPOSE (*) Closed loop gain has to be => 25dB MUTE, STAND-BY TRUTH TABLE 8/11 SW1 SW2 B A STAND-BY B B STAND-BY A A MUTE A B PLAY Decrease of Gain Danger of Oscillations Higher Low Frequency Cutoff Larger On/Off Time Smaller On/Off Time 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. 18. 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 8Ω; with higher loads (i.e.16Ω), 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.19 and fig.20. With R1=8Ω, 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 18: Bridge Application Circuit ST-BY/ MUTE C3 0.1µF C1 IN 5 7 3 + R5 4.7Ω 4 - 1µF R4 560Ω 10 1µF C7 0.1µF R2 560Ω 9 11 +VS R1 36KΩ 8 C2 C4 1000µF - RL C8 5.6nF R3 36KΩ 2 + 1 R6 4.7Ω 6 -VS D94AU190 Figure 19: Distortion vs. Output Power C5 0.1µF C6 1000µF C9 0.1µF Figure 20: Frequency Response of the Bridge Applications 9/11 TDA7265 mm DIM. MIN. TYP. inch MAX. MIN. TYP. MAX. A 5 0.197 B 2.65 0.104 C 1.6 D 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 0.862 0.874 0.886 22.5 0.854 0.87 0.886 18.1 0.685 0.772 H2 20.2 22.5 0.795 L 21.9 22.2 L1 21.7 22.1 L2 17.4 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 0.114 S 1.9 2.6 0.075 S1 1.9 2.6 0.075 0.102 Dia1 3.65 3.85 0.144 0.152 10/11 OUTLINE AND MECHANICAL DATA 0.102 Multiwatt11 V 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 2002 STMicroelectronics – Printed in Italy – All Rights Reserved STMicroelectronics GROUP OF COMPANIES Australia - Brazil - Canada - China - Finland - France - Germany - Hong Kong - India -Israel - Italy - Japan - Malaysia - Malta - Morocco Singapore - Spain - Sweden - Switzerland - United Kingdom - United States. http://www.st.com 11/11