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TDA2004A
10 + 10W STEREO AMPLIFIER FOR CAR RADIO
Its main features are : Low distortion. Low noise. High reliability of the chip and of the package with additional safety during operation thanks to protections against : RCUIT TO GROUND NDUCTIVE LOADS NG CHIP TEMPERATURE TOUS OPEN GROUND Space and cost saving : very low number of external components, very simple mounting system with no electrical isolation between the package and the heatsink. DESCRIPTION The TDA2004A is a class B dual audio power amplifier in MULTIWATT(R) package specifically desi-
.OUTPUTACSHORTCI .VERYI .OVERRATI .LOADDUMPVOLTAGESURGE .FORTUI
MULTIWATT11 ORDERING NUMBER : TDA2004A
gned for car radio applications ; stereoamplifiers 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 ).
PIN CONNECTION (top view)
March 1995
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ABSOLUTE MAXIMUM RATINGS
Symbol VS VS VS IO (*) IO (*) Ptot Tj, Tstg Opearting Supply Voltage DC Supply Voltage Peak Supply Voltage (for 50ms) Output Peak Current (non repetitive t = 0.1ms) Output Peak Current (repetitive f 10Hz) Power Dissipation at Tcase = 60C Storage and Junction Temperature Parameter 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.
THERMAL DATA
Symbol Parameter Max. Value 3 Unit C/W
Rth j-case Thermal Resistance Junction-case
ELECTRICAL CHARACTERISTICS (Refer to the test circuit, Tamb = 25C, GV = 50dB, Rth (heatsink) = 4C/W, unless otherwise specified)
Symbol VS VO Id ISB PO Parameter Supply Voltage Quiescent Output Voltage Total Quiescent Drain Current Stand-by Current Output Power (each channel) VS = 14.4V VS = 13.2V VS = 14.4V VS = 13.2V Pin 3 grounded 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; R L = 2 d Distortion (each channel) f = 1KHz VS = 14.4V; RL = 4 PO = 50mW to 4W VS = 14.4V; RL = 2 PO = 50mW to 6W VS = 13.2V; RL = 3.2 PO = 50mW to 3W VS = 13.2V; RL = 1.6 PO = 50mW to 6W VS = 14.4V VO = 4Vrms RL = 4 f = 1KHz f = 10KHz R g = 5K Test Condition Min. 8 6.6 6.0 7.2 6.6 65 62 5 Typ. Max. 18 7.8 7.2 120 120 Unit V V V mA mA mA
6 7 9 10 6 9
6.5 8 10(*) 11 6.5 10 12 0.2 0.3 0.2 0.3 1 1 1 1
W W W W w w w % % % %
CT
Cross Talk
50 40 300
60 45
dB dB mV
Vi 2/10
Input Saturation Voltage
TDA2004A
ELECTRICAL CHARACTERISTICS (continued
Symbol Ri fL Parameter Input Resistance (non inverting input) f = 1KHz Low Frequency Roll off (-3dB) RL = 4 RL = 2 RL = 3.2 RL= 1.6 RL = 1.6 to 4 f = 1KHz f = 1KHz Rg = 10K (**) fripple = 100Hz; R g = 10K C3 = 10F Vripple = 0.5Vrms VS = 14.4V RL = 4 RL = 2 VS = 13.2V RL = 3.2 RL = 1.6 f = 1KHz PO = 6.5W PO = 10W f = 1KHZ PO = 6.5W PO = 10W 35 48 15 90 50 0.5 1.5 45 5 51 Test Condition Min. 70 Typ. 200 35 50 40 55 Max. Unit K Hz Hz Hz Hz KHz dB dB dB V dB
fH GV
High Frequency Roll off (-3dB) Voltage gain (open loop) Voltage gain (closed loop) closed loop gain matching
eN SVR
Total Input noise Voltage Supply Voltage Rejection Efficiency
70 60 70 60 145
% % % % C
TJ
Thermal Shutdown Junction Temperature
Notes : (*) 9.3W without Bootstrap (**) Bandwith Filter : 22Hz to 22KHz.
Figure 1 : Test and Application Circuit.
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Figure 2 : P.C. Board and Component layout of the fig. 1 (scale 1 : 1).
Figure 3 : Quiescent Output Voltage vs. Supply Voltage.
Figure 4 : Quiescent Drain Current vs. Supply Voltage.
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Figure 5 : Distortion vs. Output Power. Figure 6 : Output Power vs. Supply Voltage.
Figure 7 : Output Power vs. Supply Voltage.
Figure 8 : Distortion vs. Frequency.
Figure 9 : Distortion vs. Frequency.
Figure 10 : Supply Voltage Rejection vs. C3.
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Figure 11 : Supply Voltage Rejection vs. Frequency. Figure 12 : Supply Voltage Rejection vs. Values of Capacitors C2 and C3.
Figure 13 : Supply Voltage Rejection vs. Values of Capacitors C2 and C3.
Figure 14 : Gain vs. Input Sensitivity.
Figure 15 : Maximum Allowable Power Dissipation vs. Ambient Temperature.
Figure 16 : Total Power Dissipation and Efficiency vs. Output Power.
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Figure 17 : Total Power Dissipation and Efficiency vs. Output Power .
APPLICATION SUGGESTION The recommended values of the componentsare those shown on application circuit of fig.1. Different values can be used ; the following table can help the designer.
Component R1 R2, R4 R3, R5 R6, R7 Recomm. Value 120K 1K 3.3 1 Purpose Larger Than Smaller Than Smaller PO max. Decrease of gain Increase of gain Optimization of the Smaller PO max. output signal simmetry Close loop gain setting (*) Frequency stability Increase of gain Decrease of gain Danger of oscillation at high frequency with inductive load High turn-on delay High turn-on pop Higher low frequency cutoff. Increase of noise
C1, C2
2.2F
Input DC decoupling
C3
10F
Ripple Rejection
Increase of SVR. Degradation of SVR. Increase of the switchon time. Increase of distortion at low frequency
C4, C6 C5, C7 C8, C9 C10, C11
100F 100F 0.1F 1000F to 2200F
Boostrapping Feedback Input DC decoupling. Frequency Stability Output DC decoupling.
Danger of oscillation. Higher low-frequency cut-off.
(*) The closed-loop gain must be higher than 26dB.
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BUILT-IN PROTECTION SYSTEMS LOAD DUMP VOLTAGE SURGE The TDA2004A has a circuit which enables it to withstand a voltage pulse train, on pin 9, of the type shown in Fig. 19. If the supply voltage peaks to more than 40 V, then an LC filter must be insertedbetweenthe supplyand pin 9, in order to assure that the pulses at pin 9 will be held within the limits shown. A suggested LC network is shown in Fig. 18. With this network, a train of pulsewith amplitude up to 120 V and with of 2 ms can be applied to point A. This type of protection is ON when the supply voltage (pulse or DC) exceeds18 V. For this reason the maximum operating supply voltage is 18 V. Figure 18. POLARITY INVERSION High current (up to 10 A) can be handled by the device with no damage for a longer period than the blow-out time of a quick 2 A 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. OPEN GROUND When the ratio is the ON condition and the ground is accidentally opened, a standard audio amplifier will be damaged. On the TDA2004A protection diodes are included to avoid any damage. INDUCTIVE LOAD A protection diode is provided to allow use of the TDA2004A with inductive loads. DC VOLTAGE The maximum operating DC voltage on the TDA2004A is 18 V. However the device can withstand a DC voltage up to 28V withno damage. This could occurduring winter if two batteries are series connected to crank the engine. Figure 19. THERMAL SHUT-DOWN The presence of a thermal limiting circuit offers the following advantages : 1) an overloadon the output(even if it is permanent), or an excessive ambient 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 the PO (and therefore Ptot) and Id are reduced. The maximum allowable power dissipationdepends upon the size of the external heatsink(i.e. its thermal resistance) ; fig. 15 shown this dissipable power as a function of ambient temperature for different thermal resistance.
SHORT CIRCUIT (AC conditions) The TDA2004A can withstand an accidental shortcircuit from the output to ground caused by a wrong connection during normal working.
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MULTIWATT11 PACKAGE MECHANICAL DATA
DIM. A B C D E F G G1 H1 H2 L L1 L2 L3 L4 L7 M M1 S S1 Dia1 MIN. mm TYP. MAX. 5 2.65 1.6 0.55 0.95 1.95 17.25 20.2 22.5 22.5 18.1 17.75 10.9 2.9 4.85 5.43 2.6 2.6 3.85 MIN. inch TYP. MAX. 0.197 0.104 0.063 0.022 0.037 0.077 0.679 0.795 0.886 0.886 0.713 0.699 0.429 0.114 0.191 0.214 0.102 0.102 0.152
1 0.49 0.88 1.45 16.75 19.6 21.9 21.7 17.4 17.25 10.3 2.65 4.25 4.73 1.9 1.9 3.65 0.019 0.035 0.057 0.659 0.772 0.862 0.854 0.685 0.679 0.406 0.104 0.167 0.186 0.075 0.075 0.144
0.039
1.7 17
0.067 0.669
22.2 22.1 17.5 10.7 4.55 5.08
0.874 0.87 0.689 0.421 0.179 0.200
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Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics 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 SGS-THOMSON Microelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. SGS-THOMSON Microelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of SGS-THOMSON Microelectronics. (c) 1995 SGS-THOMSON Microelectronics - All Rights Reserved MULTIWATT (R) is a Registered Trademark of SGS-THOMSON Microelectronics SGS-THOMSON Microelectronics GROUP OF COMPANIES Australia - Brazil - France - Germany - Hong Kong - Italy - Japan - Korea - Malaysia - Malta - Morocco - The Netherlands - Singapore Spain - Sweden - Switzerland - Taiwan - Thaliand - United Kingdom - U.S.A.
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