Download: 25 +25W STEREO AMPLIFIER WITH MUTE & ST-BY

® 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 am- plifier assembled in the Multiwatt package, spe- cially designed for high quality sound application as Hi-Fi music centers and stereo TV sets. Figure 1: Typical Application Circuit in Split Supply +VS 1000µF 15K 1µF MUTE/ ST-BY 3 IN (L) 7 + 4 OUT (L) 1µF - 18K 4.7Ω RL (L) 8 IN- (L) 100nF 15K 18K GND 9 560Ω +5V µP 10 IN- (R) 560Ω 18K 1µF - 2 OUT (R) IN (R) 11 + 4.7Ω16RL (R) -VS 100nF 1000µF D94AU085 April 2002 1/11,

ABSOLUTE MAXIMUM RATINGS

Symbol Parameter Value Unit VS DC Supply Voltage ±25 V IO Output Peak Current (internally limited) 4.5 A Ptot Power Dissipation Tcase = 70°C 30 W Top Operating Temperature -20 to 85 °C Tstg, Tj Storage and Junction Temperature -40 to +150 °C

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 Value Unit Rth j-case Thermal Resistance Junction-case Max 2 °C/W

Fig 2: Typical Application Circuit in Single Supply

+V D1 5.1V S R1 C1 R3 C5 C6 10K 1µF 15K 1000µF 0.1µF MUTE 3

PLAY

5V Q1 IN (L) 7 C9 470µF BSX33 + 4 OUT (L) 0 C3 1µF - MUTE R2 R4 R8 OUT 15K 30K 4.7Ω 8 IN- (L) (L) C7 9 0.1µF C2 R5 100µF C4 1µF 1K IN (R) 11 + C10 470µF2 IN- (R) - R6 R9 OUT 30K 4.7Ω 10 OUT (R) (R) C8 1 0.1µF6 R7 1K

GND

D96AU444A 2/11,

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 Test Condition Min. Typ. Max. Unit VS Supply Range +5 +25 V Iq Total Quiescent Current 80 130 mA VOS Input Offset Voltage –20 +20 mV Ib Non Inverting Input Bias Current 500 nA PO Music Output Power (*) THD = 10%; RL = 8Ω ; 32 W VS = + 22.5V PO Output Power THD = 10% RL = 8Ω ; 20 25 W VS + 16V; RL = 4Ω 25 W THD = 1% RL = 8Ω ; 20 W VS + 16V; RL = 4Ω 20 W THD Total Harmonic Distortion RL = 8Ω ; PO = 1W; f = 1KHz 0.01 % RL = 8Ω ; 0.7 % PO = 0.1 to 15W; f = 100Hz to 15KHz RL = 4Ω ; PO = 1W; f = 1KHz 0.02 % RL = 4Ω ; VS + 16V; 1 % PO = 0.1 to 12W; f = 100Hz to 15KHz CT Cross Talk f = 1KHz 70 dB f = 10KHz 60 dB SR Slew Rate 10 V/µs GOL Open Loop Voltage Gain 80 dB eN Total Input Noise A Curve 3 µV f = 20Hz to 22KHz48µV Ri Input Resistance 15 20 KΩ SVR Supply Voltage Rejection fr = 100Hz Vr = 0.5V 60 dB (each channel) Tj Thermal Shut-down 145 °C Junction Temperature MUTE FUNCTION [ref: +VS] VTMUTE Mute / Play Threshold -7 -6 -5 V AM Mute Attenuation 60 70 dB STAND-BY FUNCTION [ref: +VS] VTST-BY Stand-by / Mute Threshold -3.5 -2.5 -1.5 V AST-BY Stand-by Attenuation 110 dB Iq ST-BY Quiescent Current @ Stand-by 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, 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, 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, MUTE STAND-BY FUNCTION - when Vpin5 is between +VS - 2.5V and +VS - 6V the final stage current generators are The pin 5 (MUTE/STAND-BY) controls the ampli- switched on and the amplifier is in mute fier status by two different thresholds, referred to mode +VS. - when Vpin5 is lower than +VS - 6V the am- - When Vpin5 higher than = +VS - 2.5V the plifier is play mode. amplifier is in Stand-by mode and the final stage generators are off Figure 15 +VS (V) t -VS -20

VIN

(mV) Vpin5 (V)

VS

VS-2.5 VS-6 VS-10 Iq (mA)

VOUT

(V) OFF PLAY STDBY PLAY OFF STDBY STDBY MUTE D94AU086 MUTE MUTE MUTE 6/11,

Figure 16: Test and Application Circuit (Stereo Configuration)

+VS C4 C5 R2 C3 +VS MUTE/ ST-BY 3 R1 Q1 IN (L) 7 + 4 OUT (L) SW1 C1 - ST-BY DZ R5 R7 RL (L) 8 IN- (L) C8 R4 R3 GND 9 R6 SW2 10 IN- (R) R9

MUTE

R8 C2 - 2 OUT (R) IN (R) 11 + R1016RL (R) -VS C9 C7 C6 D94AU087B

Figure 17: PC Board and Components Layout of the figure 15 (1:1 scale)

7/11,

APPLICATIONS SUGGESTION nents are those shown are the demo board sche-

(Demo Board Schematic) matic different values can be used: the following table can help the designer.

The recommended values of the external compo-

COMPONENTS RECOMMENDEDVALUE PURPOSE LARGER THAN SMALLER THAN RECOMMENDED VALUE RECOMMENDED VALUE R1 10KΩ Mute Circuit Increase of DzBiasing 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 Closed Loop Gain Increase of Gain Setting (*) R6, R9 560Ω Decrease of Gain R7, R10 4.7Ω Frequency Stability Danger of Oscillations Danger of Oscillations C1, C2 1µF Input DC Higher Low FrequencyDecoupling Cutoff C3 1µF St-By/Mute TimeConstant Larger On/Off Time Smaller On/Off Time C4, C6 1000µF Supply VoltageBypass Danger of Oscillations C5, C7 0.1µF Supply VoltageBypass Danger of Oscillations C8, C9 0.1µF Frequency Stability Dz 5.1V Mute Circuit Q1 BC107 Mute Circuit (*) Closed loop gain has to be => 25dB

MUTE, STAND-BY TRUTH TABLE

SW1 SW2BASTAND-BYBBSTAND-BYAAMUTEABPLAY 8/11, BRIDGE APPLICATION The detected characteristics of T.H.D. vs Pout Another application suggestion concerns the and Frequency Response are shown in fig.19 and BRIDGE configuration, where the two power am- fig.20. plifiers are connected as shown by the schematic With R1=8Ω, Vs=+/-16V the maximum output diagram of figure. 18. power obtainable is 50W at T.D.H.=10%. This application shows, however, some operative The quiescent current remains unchanged with limits due to dissipation and current capability of respect to the stereo configuration (~80mA as the output stage. For this reason, we reccomend typical at Vs=+/-16V). to use the TDA7265 in bridge with the supply volt- The last point to take into consideration concerns age equal/lower than ±16V when the load is 8Ω; the short-circuit protection. As for the stereo appli- with higher loads (i.e.16Ω), the amplifier can work cation, the TDA7265 is fully protected against any correctly in the whole supply voltage range. kind of short-circuit ( between Out/Gnd, Out/+Vs and Out/-Vs). Figure 18: Bridge Application Circuit ST-BY/ +V MUTE SC3 C4 0.1µF 1000µF53C1 R5 4.7Ω C7 7 0.1µF IN + 4 1µF - R1 36KΩ R2 560Ω RL R4 560Ω C8 10 5.6nF R3 36KΩ C2 - 2 + 1µF16R6 4.7Ω -VS C5 C6 C9 D94AU190 0.1µF 1000µF 0.1µF Figure 19: Distortion vs. Output Power Figure 20: Frequency Response of the Bridge Ap- plications 9/11, mm inch DIM. MIN. TYP. MAX. MIN. TYP. MAX. OUTLINE ANDA50.197 MECHANICAL DATA B 2.65 0.104 C 1.6 0.063D10.039 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 0.713 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 L7 2.65 2.9 0.104 0.114 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 Multiwatt11 V Dia1 3.65 3.85 0.144 0.152 10/11, 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]

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