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TDA2005
20W BRIDGE AMPLIFIER FOR CAR RADIO
High output power : PO = 10 + 10 W@RL = 2, d = 10% ; PO = 20W@RL = 4 , d = 1 %. High reliability of the chip and package with additional complete safety during operation thanks to protection against : OUTPUT DC AND AC SHORT CIRCUIT TO GROUND OVERRATING CHIP TEMPERATURE LOAD DUMP VOLTAGE SURGE FORTUITOUS OPEN GROUND VERY INDUCTIVE LOADS Flexibility in use : bridge or stereo booster amplifiers with or without boostrap and with programmable gain and bandwidth. Space and cost saving : very low number of external components, very simple mounting system with no electrical isolation between the package and the heatsink (one screw only). In addition, the circuit offers loudspeaker protection during short circuit for one wire to ground.
. . . . .
MULTIWATT11 ORDERING NUMBERS : TDA2005M (Bridge Appl.) TDA2005S (Stereo Appl.)
DESCRIPTION The TDA2005 is class B dual audio power amplifier in MULTIWATT® package specifically designed for car radio application : power booster amplifiers are easily designed using this device that provides a high current capability (up to 3.5 A) and that can drive very low impedance loads (down to 1.6 in
ABSOLUTE MAXIMUM RATINGS
Symbol Vs Vs Vs Io (*) Io (*) Ptot Tstg, Tj Parameter Operating Supply Voltage DC Supply Voltage Peak Supply Voltage (for 50 ms) Output Peak Current (non repetitive t = 0.1 ms) Output Peak Current (repetitive f 10 Hz) Power Dissipation at Tcase = 60 °C Storage and Junction Temperature Value 18 28 40 4.5 3.5 30 40 to 150 Unit V V V A A W °C
(*) The max. output current is internally limited.
PIN CONNECTION
11 10 9 8 7 6 5 4 3 2 1 BOOTSTRAP(1) OUTPUT(1) +VS OUTPUT(2) BOOTSTRAP(2) GND INPUT+(2) INPUT-(2) SVRR INPUT-(1) INPUT+(1)
TAB CONNECTED TO PIN 6
D95AU318
October 1998
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SCHEMATIC DIAGRAM
THERMAL DATA
Symbol R th j-case 2/20 Parameter Thermal Resistance Junction-case Max. Value 3 Unit °C/W
TDA2005
BRIDGE AMPLIFIER APPLICATION (TDA2005M) Figure 1 : Test and Application Circuit (Bridge amplifier)
Figure 2 : P.C. Board and Components Layout of Figure 1 (1:1 scale)
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ELECTRICAL CHARACTERISTICS (refer to the Bridge applicationcircuit, Tamb = 25oC, GV = 50dB, Rth (heatsink) = 4oC/W, unless otherwise specified)
Symbol Vs Vos Id Po Parameter Supply Voltage Output Offset Voltage (1) (between pin 8 and pin 10) Total Quiescent Drain Current Output Power Vs = 14.4V Vs = 13.2V Vs = 14.4V Vs = 13.2V d = 10% Vs = 14.4V Vs = 13.2V d Distortion RL = 4 RL = 3.2 f = 1 Hz RL = 4 RL = 3.2 RL = 3.2 18 20 17 75 70 20 22 19 Test Conditions Min. 8 Typ. Max. 18 150 150 150 160 Unit V mV mV mA mA W
f = 1kHz RL = 4 Vs = 14.4V Po = 50mW to 15W Vs = 13.2V RL = 3.2 Po = 50mW to 13W f = 1kHz Po = 2W Po = 2W f = 1kHz RL = 3.2 RL = 3.2 f = 1kHz Rg = 10k (2) Rg = 10k, C4 = 10µF fripple = 100Hz, Vripple = 0.5V Vs = 14.4V, f = 1 Po = 20W Po = 22W Vs = 13.2V, f = 1 Po = 19W kHz RL = 4 RL = 3.2 kHz RL = 3.2 45 20 50 3 55 RL = 4 RL = 3.2 70 9 8
1 1
% % mV mV k
Vi
Input Sensitivity
Ri fL fH Gv eN SVR
Input Resistance Low Frequency Roll Off ( 3dB) High Frequency Roll Off ( 3dB) Closed Loop Voltage Gain Total Input Noise Voltage Supply Voltage Rejection Efficiency
40
Hz kHz dB
10
µV dB
60 60 58 145
% % % °C
Tj VOSH
Notes :
Thermal Shut-down Junction Temperature Output Voltage with one Side of
1. the Speaker shorted to ground For TDA2005M only 2. Bandwith Filter : 22Hz to 22kHz.
Vs = 14.4V, RL = 4 f = 1kHz, Ptot = 13W Vs = 14.4V Vs = 13.2V RL = 4 RL = 3.2
2
V
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Figure 3 : Output Offset Voltage versus Supply Voltage Figure 4 : Distortion versus Output Power (bridge amplifier)
Figure 5 :
Distortion versus Output Power (bridge amplifier)
BRIDGE AMPLIFIER DESIGN The following consideraions can be useful when designing a bridge amplifier.
Parameter Vo max Io max Po max
Where :
Peak Output Voltage (before clipping) Peak Output Current (before clippling) RMS Output Power (before clipping)
VCE sat = output transistors saturation voltage VS = allowable supply voltage RL = load impedance
Single Ended 1 (Vs 2 VCE sat)
Bridge Vs 2 VCE sat VS - 2 VCE sat RL (VS - 2 VCE sat)2 2 RL
2
1 VS - 2 VCE sat 2 RL
2 1 (VS - 2 VCE sat) 2 RL 4
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Voltage and current swings are twice for a bridge amplifier in comparison with single ended amplifier. In order words, with the same RL the bridge configuration can deliver an output power that is four times the output power of a single ended amplifier, while, with the same max output current the bridge configuration can deliver an output power that is twice the output power of a single ended amplifier. Core must be taken when selecting VS and RL in order to avoid an output peak current above the absolute maximum rating. From the expression for I Omax, assuming VS = 14.4V and VCE sat = 2V, the minimum load that can be driven by TDA2005 in bridge configuration is : VS - 2 VCEsat 14.4 -4 = 2.97 = RL min = IO max 3.5 The voltage gain of the bridge configurationisgiven by (see Figure 34) : V0 R1 R3 =1+ + GV = V1 R2 R4 R4 R2 + R4 STEREO AMPLIFIER APPLICATION (TDA2005S) Figure 7 : Typical Application Circuit For sufficiently high gains (40 to 50dB) it is possible to put R2 = R4 and R3 = 2 R1, simplifing the formula in : R1 GV = 4
R2
Gv (dB) 40 50
R 1 () 1000 1000
R2 = R4 () 39 12
R3 () 2000 2000
Figure 6 : Bridge Configuration
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ELECTRICAL CHARACTERISTICS (refer to the Stereo application circuit, Tamb = 25oC, GV = 50dB, Rth (heatsink) = 4oC/W, unless otherwwise specified)
Symbol Vs Vo Id Po Supply Voltage Quiescent Output Voltage Total Quiescent Drain Current Output Power (each channel) Vs = 14.4V Vs = 13.2V Vs = 14.4V Vs = 13.2V f = 1kHz, d = 10% Vs = 14.4V RL = 4 RL = 3.2 RL = 2 RL = 1.6 Vs = 13.2V RL = 3.2 RL = 1.6 Vs = 16V RL = 2 f = 1kHz RL = 4 Vs = 14.4V Po = 50mW to 4W Vs = 14.4V RL = 2 Po = 50mW to 6W Vs = 13.2V RL = 3.2 Po = 50mW to 3W RL = 1.6 Vs = 13.2V Po = 40mW to 6W Vs = 14.4V, Vo = 4VRMS RL = 4, Rg = 5k f = 1kHz f = 10kHz 300 f = 1kHz, Po = 1W RL = 4 RL = 3.2 f = 1kHz RL = 2 RL = 2 f = 1kHz f = 1kHz Rg = 10k (2) Rg = 10k, C3 = 10µF fripple = 100Hz, Vripple = 0.5V Vs = 14.4V, f = 1kHz Po = 6.5W RL = 4 Po = 10W RL = 2 Vs = 13.2V, f = 1kHz Po = 6.5W RL = 3.2 Po = 100W RL = 1.6 35 48 15 90 50 0.5 1.5 45 5 51 70 6 5.5 200 50 k Hz kHz dB dB dB µV dB 6 7 9 10 6 9 Parameter Test Conditions Min. 8 6.6 6 7.2 6.6 65 62 6.5 8 10 11 6.5 10 12 Typ. Max. 18 7.8 7.2 120 120 Unit V V V mA mA W
d
Distortion (each channel)
0.2 0.3 0.2 0.3
1 1 1 1
% % % % dB
CT
Cross Talk (1)
60 45 mV mV
Vi Vi
Input Saturation Voltage Input Sensitivity
Ri fL fH Gv Gv Gv eN SVR
Input Resistance Low Frequency Roll Off ( 3dB) High Frequency Roll Off ( 3dB) Voltage Gain (open loop) Voltage Gain (closed loop) Closed Loop Gain Matching Total Input Noise Voltage Supply Voltage Rejection Efficiency
70 60 70 60
% % % %
Notes :
1. 2.
For TDA2005M only Bandwith Filter : 22Hz to 22kHz.
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Figure 8 : Quiescent Output Voltage versus Supply Voltage (Stereo amplifier) Figure 9 : Quiescent Drain Current versus Supply Voltage (Stereo amplifier)
Figure 10 : Distortion versus Output Power (Stereo amplifier)
Figure 11 : Output Power versus Supply Voltage (Stereo amplifier)
Figure 12 : Output Power versus Supply Voltage (Stereo amplifier)
Figure 13 : Distortion versus Frequency (Stereo amplifier)
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Figure 14 : Distortion versus Frequency (Stereo amplifier) Figure 15 : Supply Voltage Rejection versus C3 (Stereo amplifier)
Figure 16 : Supply Voltage Rejection versus Frequency (Stereo amplifier)
Figure 17 : Supply Voltage Rejection versus C2 and C3 (Stereo amplifier)
Figure 18 : Supply Voltage Rejection versus C2 and C3 (Stereo amplifier)
Figure 19 : Gain versus Input Sensitivity (Stereo amplifier)
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Figure 21 : Total Power Dissipation and Efficiency versus Output Power (Bridge amplifier)
Figure 20 : Gain versus Input Sensitivity (Stereo amplifier)
Figure 22 : Total Power Dissipation and Efficiency versus Output Power (Stereo amplifier)
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APPLICATION SUGGESTION The recommended values of the components are those shown on Bridge applicatiion circuit of Figure 1. Different values can be used ; the following table can help the designer.
Comp. R1 R2 R3 Recom. Value 120 k 1k 2 k Purpose Optimization of the Output Symmetry Larger Than Smaller Po max Smaller Than Smaller Po max
R4, R5
12
Closed Loop Gain Setting (see Bridge Amplifier Design) (*)
R6, R7 C1 C2
1 2.2 µF 2.2 µF
Frequency Stability Input DC Decoupling Optimization of Turn on Pop and Turn on Delay Supply by Pass Ripple Rejection Bootstrapping Feedback Input DC Decoupling, Low Frequency Cut-off Frequency Stability
Danger of Oscillation at High Frequency with Inductive Loads
High Turn on Delay
Higher Turn on Pop, Higher Low Frequency Cut-off, Increase of Noise Danger of Oscillation
C3 C4 C5, C7 C6, C8 C 9, C10
0.1 µF 10 µF 100 µF 220 µF 0.1 µF
Increase of SVR, Increase of the Switch-on Time
Degradation of SVR. Increase of Distortion at low Frequency Higher Low Frequency Cut-off Danger of Oscillation
(*) The closed loop gain must be higher than 32dB.
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APPLICATION INFORMATION Figure 23 : Bridge Amplifier without Boostrap
Figure 24 : P.C. Board and Components Layout of Figure 23 (1:1 scale)
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APPLICATION INFORMATION (continued) Figure 25 : Low Cost Bridge Amplifier (GV = 42dB)
Figure 26 : P.C. Board and Components Layout of Figure 25 (1:1 scale)
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APPLICATION INFORMATION (continued) Figure 27 : 10 + 10 W Stereo Amplifier with Tone Balance and LoudnessControl
Figure 28 : Tone Control Response (circuit of Figure 29)
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APPLICATION INFORMATION (continued) Figure 29 : 20W Bus Amplifier
Figure 30 : Simple 20W Two Way Amplifier (FC = 2kHz)
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APPLICATION INFORMATION (continued) Figure 31 : Bridge Amplifier Circuit suited for Low-gain Applications (GV = 34dB)
Figure 32 : Example of Muting Circuit
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BUILT-IN PROTECTION SYSTEMS Load Dump Voltage Surge The TDA2005 has a circuit which enables it to withstanda voltagepulse train, on Pin 9, of the type shown in Figure 34. If the supply voltage peaks to more than 40V, then an LC filter must be inserted between the supply and pin 9, in order to assure that the pulses at pin 9 will be held withing the limits shown. A suggestedLC networkis shownin Figure33.With this network, a train of pulses with amplitude up to 120V and width of 2ms can be applied at point A. This type of protection is ON when the supply voltage (pulse or DC) exceeds 18V. For this reason the maximum operating supply voltage is 18V. Figure 33 Thermal Shut-down The presence of a thermal limiting circuit offers the following advantages : 1) an overload on the output (even if it is p erm an e n t ), o r a n ex c es si ve a mb ien t temperature can be easily withstood. 2) the heatsink can have a smaller factor of safety compared with that of a conventional circuit. There is no device damage in the case of excessive junction temperature : all that happens is that PO (and thereforePtot) and Id are reduced. The maximum allowable power dissipation depends upon the size of the external heatsink(i.e. its thermal resistance) ; Figure 35 shows the dissipable power as a function of ambient temperature for different thermal resistance. Loudspeaker Protection The circuit offers loudspeaker protection during short circuit for one wire to ground. Open Ground When the ratio is in the ON condition and the ground is accidentally opened, a standard audio amplifier will be damaged.On the TDA2005 protection diodes are included to avoid any damage. Inductive Load A protection diode is provided to allow use of the TDA2005 with inductive loads. DC Voltage The maximum operating DC voltage for the TDA2005 is 18V. However the device can withstand a DC voltage up to 28V with no damage. This could occur during winter if twobatteries are series connectedto crank the engine.
Figure 34
Short Circuit (AC and DC conditions) TheTDA2005 can withstanda permanentshort-circuit on the output for a supply voltage up to 16V. Polarity Inversion High current (up to 10A) can be handled by the device with no damage for a longer period than the blow-out time of a quick 2A fuse (normally connected in series with the supply). This feature is added to avoid destruction, if during fitting to the car, a mistake on the connection of the supply is made.
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Figure 35 : Maximum Allowable Power Dissipation versus Ambient Temperature Figure 36 : Output Power and Drain Current versus Case Temperature
Figure 37 : Output Power and Drain Current versus Case Temperature
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DIM. 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 4.55 5.08 17.5 10.7 22.2 22.1 0.49 0.88 1.45 16.75 19.6 20.2 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 0.179 0.200 0.689 0.421 0.874 0.87 1.7 17 1 0.55 0.95 1.95 17.25 0.019 0.035 0.057 0.659 0.772 0.795 0.886 0.886 0.713 0.699 0.429 0.114 0.191 0.214 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 0.077 0.679 MIN. inch TYP. MAX. 0.197 0.104 0.063
OUTLINE AND MECHANICAL DATA
Multiwatt11 V
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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 © 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. http://www.st.com
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