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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 in Split Supply
Multiwatt11 ORDERING NUMBER: TDA7265
+VS 1000µF MUTE/ ST-BY IN (L) 1µF 3
15K
1µF
5 7 + -
4
OUT (L) 18K 4.7 100nF 560
8 15K +5V µP 18K GND 9 10
IN- (L)
RL (L)
IN- (R)
560 18K
1µF
IN (R)
11
+ 1 6 -VS 1000µF
2
OUT (R) 4.7 100nF
RL (R)
D94AU085
April 2002
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ABSOLUTE MAXIMUM RATINGS
Symbol VS IO Ptot Top Tstg, Tj DC Supply Voltage Output Peak Current (internally limited) Power Dissipation Tcase = 70°C 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
Fig 2: Typical Application Circuit in Single Supply
D1 5.1V R1 10K PLAY 5V 0 MUTE C1 1µF R3 15K MUTE Q1 BSX33 R2 15K C2 100µF C3 1µF IN (L) 5 7 + -
+VS C5 1000µF 3 4 OUT (L) R4 30K R5 1K + 2 IN- (R) R6 30K R7 1K C9 470µF C6 0.1µF
8 9 C4 1µF IN (R) 11
IN- (L)
R8 4.7 C7 0.1µF C10 470µF
OUT (L)
10 1 6 GND
OUT (R)
R9 4.7 C8 0.1µF
OUT (R)
D96AU444A
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ELECTRICAL CHARACTERISTICS (Refer to the test circuit, VS = + 20V; RL = 8; RS = 50; GV = 30dB; f = 1KHz; Tamb = 25°C, 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% RL = 8 ; VS + 16V; RL = 4 THD = 1% RL = 8 ; VS + 16V; RL = 4 THD Total Harmonic Distortion RL = 8 ; PO = 1W; f = 1KHz RL = 8 ; PO = 0.1 to 15W; f = 100Hz to 15KHz RL = 4 ; PO = 1W; f = 1KHz RL = 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 -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 20 500 32 Test Condition Min. +5 80 Typ. Max. +25 130 +20 Unit V mA mV nA W
20
25 25 20 20 0.01 0.7
W W W W % %
% %
dB dB V/µs dB µV µV K dB °C
MUTE FUNCTION [ref: +VS] Mute / Play Threshold VTMUTE AM VTST-BY AST-BY Iq ST-BY Mute Attenuation Stand-by / Mute Threshold Stand-by Attenuation Quiescent Current @ Stand-by STAND-BY FUNCTION [ref: +VS]
-6 70 -2.5 110 3
-5
V dB
-1.5
V dB mA
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 1KHz.
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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
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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
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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 15
+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
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PLAY
STDBY
PLAY
OFF STDBY
D94AU086
MUTE
MUTE
MUTE
TDA7265
Figure 16: Test and Application Circuit (Stereo Configuration)
+VS C4 C5
R2
C3
MUTE/ ST-BY IN (L) C1
+VS 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 17: PC Board and Components Layout of the figure 15 (1:1 scale)
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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 1µF 1µF 1000µF 0.1µF 0.1µF 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
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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 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.19 and fig.20. 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 18: Bridge Application Circuit
ST-BY/ MUTE +VS
C3 0.1µF C1 5 7 + 8 3 4
C4 1000µF R5 4.7
IN 1µF
C7 0.1µF
R1 36K R2 560 R4 560 R3 36K C8 5.6nF
9
RL
10
C2
11
+ 1 6
2
1µF
R6 4.7 -VS C6 1000µF C9 0.1µF
D94AU190
C5 0.1µF
Figure 19: Distortion vs. Output Power
Figure 20: Frequency Response of the Bridge Applications
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DIM. MIN. A B C D E F G G1 H1 H2 L L1 L2 L3 L4 L7 M M1 S S1 Dia1 21.9 21.7 17.4 17.25 10.3 2.65 4.25 4.73 1.9 1.9 3.65 0.49 0.88 1.45 16.75 19.6
mm TYP. MAX. 5 2.65 1.6 1 0.55 0.95 1.7 17 1.95 17.25 20.2 22.2 22.1 17.5 10.7 4.55 5.08 22.5 22.5 18.1 17.75 10.9 2.9 4.85 5.43 2.6 2.6 3.85 0.862 0.854 0.685 0.679 0.406 0.104 0.167 0.186 0.075 0.075 0.144 0.019 0.035 0.057 0.659 0.772 MIN.
inch TYP. MAX. 0.197 0.104 0.063 0.039 0.022 0.037 0.067 0.669 0.077 0.679 0.795 0.874 0.87 0.689 0.421 0.179 0.200 0.886 0.886 0.713 0.699 0.429 0.114 0.191 0.214 0.102 0.102 0.152
OUTLINE AND MECHANICAL DATA
Multiwatt11 V
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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
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