TDA7265SA
18W+18W STEREO AMPLIFIER WITH MUTE & ST-BY
1
■■■■■■■■■
FEATURES
WIDE SUPPLY VOLTAGE RANGE (UP TO +25V ABS MAX.)SPLIT SUPPLY
HIGH OUTPUT POWER 18+18W@THD = 10%, RL= 8Ω, VS = ±17.5VNO POP AT TURN-ON/OFFMUTE (POP FREE)
STAND-BY FEATURE (LOW Iq)
SHORT CIRCUIT PROTECTION TO GNDTHERMAL OVERLOAD PROTECTIONCLIPWATT 11 PACKAGE
Figure 1. PackageClipwatt11Table 1. Order Codes
Part NumberTDA7265SA
PackageClipwatt11
2DESCRIPTION
plication as Hi-Fi music centers and stereo TVsets.
The TDA7265SA is pin to pin compatible withTDA7269, TDA7269A, TDA7269SA, TDA7265,TDA7499, TDA7499SA.
The TDA7265SA is class AB Dual Audio Poweramplifier assembled in the @ Clipwatt 11 pack-age, specially designed for high quality sound ap-Figure 2. Test and Application Diagram
+VS1000µFMUTE/ST-BYIN (L)1µF57+-815K+5VµP18KGND910IN- (R)34OUT (L)18KIN- (L)4.7Ω100nF560Ω560Ω18K1µFIN (R)11-+16-VS1000µFD94AU08515K1µFRL (L)2OUT (R)4.7Ω100nFRL (R)July 2004
Rev. 21/12
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TDA7265SA
Table 2. Absolute Maximum Ratings
SymbolVSIOPtotTambTstg, Tj
DC Supply Voltage
Output Power Current (internally limited)Total Power Dissipation (Tamb = 70°C)Ambient Operating Temperature (1)Storage and Junction Temperature
Parameter
Value±254.5300 to 70-40 to 150
UnitVAW°C°C
Figure 3. Pin Connection (Top view)
1110987654321IN+(1)IN-(1)GNDIN-(2)IN+(2)-VSMUTEOUTPUT(2)+VSOUTPUT(1)-VSD03AU1506Table 3. Thermal Data
SymbolRth j-caseRth j-amb
Parameter
Thermal Resistance Junction-caseThermal Resistance Junction-ambient
Value max = 3 48
Unit°C/W°C/W
Figure 4. Single Supply Application
+VSC51000µFMUTEPLAY5V0MUTEQ1BSX33R215KC2100µFC3 1µFIN (L)57+-89C4 1µFIN (R)11+-1016GNDOUT (R)R630KR71KR94.7ΩC80.1µFOUT(R)2IN- (R)IN- (L)34OUT (L)R430KR51KC9 470µFR84.7ΩC70.1µFC10 470µFC60.1µFD1 5.1VR110KC11µFR315KOUT(L)D96AU444A2/12
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TDA7265SA
Table 4. Electrical Characteristcs
(Refer to the test circuit VS = ±17.5V; RL = 8Ω; RS = 50Ω; GV = 30dB, f = 1KHz; Tamb = 25°C, unlessotherwise specified)
SymbolVSIqVOSIbPO
Parameter
Supply Voltage RangeTotal Quiescent CurrentInput Offset Voltage
Non Inverting Input Bias CurrentOutput Power
THD = 10%; RL = 8Ω;
VS = ±13V; RL = 4Ω; THD = 1%; RL = 8Ω;
VS = ±13V; RL = 4Ω;
THD
Total Harmonic Distortion
RL = 8Ω; PO = 1W; f = 1KHz; RL = 8Ω; PO = 0.1 to 5W; f = 100Hz to 15KHz; RL = 4Ω; PO = 1W; f = 1KHz; RL = 4Ω; VS = ±10V;PO = 0.1 to 5W;
f = 100Hz to 15KHz;
CTSRGOLeNRiSVRTj
Cross TalkSlew Rate
Open Loop Voltage GainTotal Output NoiseInput ResistanceSupply Voltage Rejection(each channel)
Thermal Shut-down Junction TemperatureMute /Play thresholdMute AttenuationStand-by Mute threshold Stand-by Attenuation
Quiescent Current @ Stand-by
-760-3.5
f = 100Hz; VR = 0.5VA Curve
f = 20Hz to 22KHz
15
f = 1KHz;f = 10KHz;
6.5
70601080342060145
8
0.02
1
-20
500181813130.03
0.7
Test Condition
Min.±5
80Typ.
Max.±2513020
UnitVmAmVnAWWWW%%%%
dBdBV/µsdBµVµVKΩdB°C
MUTE FUNCTION [ref +VS] (*)VMUTEAMUTEVST-BYAST-BYIqST-BY
-670-2.51103
6-1.5-5
VdBVdBmA
STAND-BY FUNCTIONS [ref: +VS] (only for Split Supply)
(*) In mute condition the current drawn from Pin 5 must be ≤650µA
3/12
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3MUTE 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 generatorsare off.
–When Vpin5 between = +VS -2.5V and VS -6V the final stage current generators are switched on andthe amplifier is in mute mode.
–When Vpin5 lower than = +VS -6V the amplifier is play mode.Figure 5.
+VS(V)20t-VS-20VIN(mV)Vpin5(V)VSVS-2.5VS-6VS-10Iq(mA)0VOUT(V)OFFSTDBYMUTEPLAYSTDBYPLAYOFFSTDBYD94AU086MUTEMUTEMUTE4/12
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TDA7265SA
Figure 6. Test and Application Circuit (Stereo Configuration)
+VSC4C5R2C3MUTE/ST-BYIN (L)C1+VS57+-834R1SW1ST-BYDZQ1OUT (L)R5IN- (L)R6R7C8RL (L)R4SW2MUTER3GND910IN- (R)R8R9C2 IN (R)11-+16-VSC72OUT (R)R10C9RL (R)C6D94AU087B4APPLICATION SUGGESTIONS (DEMO BOARD SCHEMATIC)
The recommended values of the external components are those shown the demoboard schematic different val-ues can be used, the following table can help the designerTable 5. .
COMPONENT
R1R2R3R4R5, R8R6, R9R7, R10C1, C2C3C4, C6C5, C7C8, C9Dz
SUGGESTION
VALUE
10KΩ15KΩ18KΩ15KΩ18KΩ560Ω4.7Ω1µF1µF1000µF0.1µF0.1µF5.1V
PURPOSE
Mute CircuitMute CircuitMute CircuitMute CircuitClosed Loop Gain Setting (*)
Frequency StabilityInput DC DecouplingSt-By/Mute Time Constant
Supply Voltage BypassSupply Voltage BypassFrequency StabilityMute Circuit
Larger On/Off TimeLARGER THAN RECOMMENDED VALUEIncrease of Dz Biasing Current
Vpin #5 Shifted DownwardVpin #5 Shifted UpwardVpin #5 Shifted UpwardIncrease of GainDecrease of GainDanger of Oscillations
Danger of OscillationsHigher Low Frequency CutoffSmaller On/Off TimeDanger of OscillationsDanger of OscillationsVpin #5 Shifted UpwardVpin #5 Shifted DownwardVpin #5 Shifted DownwardSMALLER THAN RECOMMENDED VALUE
(*) Closed loop gain has to be ≥25dB
5/12
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TDA7265SA
5PC BOARD
Figure 7. Evaluation Board Top Layer Layou
Figure 8. Evaluation Board Bottom Layer Layout
Figure 9. Component Layout
6/12
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TDA7265SA
Figure 10. Quiescent Current vs. Supply
Voltage
Figure 13. Output Power vs. Supply Voltage
Figure 11. Frequency ResponseFigure 14. Quiescent Current vs. Pin #5 VoltageFigure 12. Output Power vs. Supply VoltageFigure 15. Attenuation vs. Pin #5 Voltage
7/12
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Figure 16. SVR vs. Frequency
Figure 18. Power Dissipation vs. Output Power
Figure 17. Attenuation vs. Pin #5 VoltageFigure 19. Power Dissipation vs. Output Power
6HEAT SINK DIMENSIONING:
In order to avoid the thermal protection intervention, that is placed approximatively at Tj = 150°C, it is im-portant the dimensioning of the Heat Sinker RTh (°C/W).The parameters that influence the dimensioning are:–Maximum dissipated power for the device (Pdmax)–Max thermal resistance Junction to case (RTh j-c)–Max. ambient temperature Tamb max–Quiescent current Iq (mA)Example:VCC = ±17.5V, Rload = 8ohm, RTh j-c = 3 °C/W , Tamb max = 50°C2Vcc
Pdmax = (N° channels) · --------------------------+Iq⋅Vcc2
Π⋅Rload
2
8/12
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Pdmax = 2 · ( 7.7 ) + 1.0 = 16 W150–Tamb max–50(Heat Sinker) RTh c-a=----------------------------------------–RTh j-c=150----------------------–3=3.25°C/W
16Pd maxIn figure 20 is shown the Power derating curve for the device.Figure 20. Power derating curve
353025(b)Pd (W)2015(c)105004080Tamb(°C)120160(a)a)b)c)Infinite Heatsink1.5 °C/ W3.0 °C/ W7CLIPWATT ASSEMBLING SUGGESTIONS
The suggested mounting method of Clipwatt on external heat sink, requires the use of a clip placed as much aspossible in the plastic body center, as indicated in the example of figure 21.A thermal grease can be used in order to reduce the additional thermal resistance of the contact between pack-age and heatsink.A pressing force of 7 - 10 Kg gives a good contact and the clip must be designed in order to avoid a maximumcontact pressure of 15 Kg/mm2 between it and the plastic body case.As example, if a 15Kg force is applied by the clip on the package, the clip must have a contact area of 1mm2at least.Figure 21. Example of right placement of the clip
9/12
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Figure 22. Clipwatt11 Mechanical Data & Package DimensionsDIM.ABCDEFF1GG1H1H2H3LL1L2L3MM110.719.8517.914.55115.52.542.5411.20.4211.5716.871.7171218.60.7810.7000.5800.4330.2170.1000.1000.4410.490.770.80.151.50.550.880.151.8317.130.0620.6640.0670.6690.4800.7320.0190.0300.031mmMIN.TYP.MAX.3.21.050.0060.0590.0020.0350.0060.0720.674MIN.inchTYP.MAX.0.1260.041Weight: 1.80grOUTLINE ANDMECHANICAL DATAClipwatt110044448 G10/12
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Table 6. Revision History
DateSeptember 2003
July 2004
Revision
12
First Issue
Changing of the Style-sheet.
Changed the maturity from Product Preview to Final.
Description of Changes
11/12
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TDA7265SA
Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequencesof 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 grantedby implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subjectto change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are notauthorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics.
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