TDA2004A march 1995 10 + 10w stereo amplifier for car radio multiwatt11 ordering number : TDA2004A pin connection (top view) its main features are : low distortion. low noise . high reliability of the chip and of the package with additional safety during operation thanks to protec- tions against : . output ac short circuit to ground . very inductive loads . overrating chip temperature . load dump voltage surge . fortuitous open ground space and cost saving : very low number of exter- nal 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 am- plifier in multiwatt ? package specifically desi- gned for car radio applications ; stereo amplifiers are easily designed using this device that provides a high current capability (up to 3.5 a) and that can dri- ve very low impedance loads (down to 1.6 w ). 1/10
thermal data symbol parameter value unit r th j-case thermal resistance junction-case max. 3 c/w absolute maximum ratings symbol parameter value unit v s opearting supply voltage 18 v v s dc supply voltage 28 v v s peak supply voltage (for 50ms) 40 v i o (*) output peak current (non repetitive t = 0.1ms) 4.5 a i o (*) output peak current (repetitive f 3 10hz) 3.5 a p tot power dissipation at t case = 60 c30w t j , t stg storage and junction temperature C40 to 150 c electrical characteristics (refer to the test circuit, t amb = 25 c, g v = 50db, rt h (heatsink) = 4 c/w, unless otherwise specified) symbol parameter test condition min. typ. max. unit v s supply voltage 8 18 v v o quiescent output voltage vs = 14.4v v s = 13.2v 6.6 6.0 7.2 6.6 7.8 7.2 v v i d total quiescent drain current v s = 14.4v v s = 13.2v 65 62 120 120 ma ma i sb stand-by current pin 3 grounded 5 ma p o output power (each channel) f = 1khz, d = 10% v s = 14.4v r l = 4 w r l = 3.2 w r l = 2 w r l = 1.6 w 6 7 9 10 6.5 8 10(*) 11 w w w w v s = 13.2v r l = 3.2 w r l = 1.6 w 6 9 6.5 10 w w v s = 16v; r l = 2 w 12 w d distortion (each channel) f = 1khz v s = 14.4v; r l = 4 w p o = 50mw to 4w v s = 14.4v; r l = 2 w p o = 50mw to 6w v s = 13.2v; r l = 3.2 w p o = 50mw to 3w v s = 13.2v; r l = 1.6 w p o = 50mw to 6w 0.2 0.3 0.2 0.3 1 1 1 1 % % % % ct cross talk v s = 14.4v v o = 4vrms r l = 4 w f = 1khz f = 10khz r g = 5k w 50 40 60 45 db db v i input saturation voltage 300 mv (*) the max. output current is internally limited. TDA2004A 2/10
notes : (*) 9.3w without bootstrap (**) bandwith filter : 22hz to 22khz. electrical characteristics (continued symbol parameter test condition min. typ. max. unit r i input resistance (non inverting input) f = 1khz 70 200 k w f l low frequency roll off (-3db) r l = 4 w r l = 2 w r l = 3.2 w r l = 1.6 w 35 50 40 55 hz hz hz hz f h high frequency roll off (-3db) r l = 1.6 w to 4 w 15 khz g v voltage gain (open loop) f = 1khz 90 db voltage gain (closed loop) f = 1khz 48 50 51 db closed loop gain matching 0.5 db e n total input noise voltage r g = 10k w (**) 1.5 5 m v svr supply voltage rejection f ripple = 100hz; r g = 10k w c3 = 10 m f v ripple = 0.5vrms 35 45 db h efficiency v s = 14.4v f = 1khz r l = 4 w p o = 6.5w r l = 2 w p o = 10w v s = 13.2v f = 1khz r l = 3.2 w p o = 6.5w r l = 1.6 w p o = 10w 70 60 70 60 % % % % t j thermal shutdown junction temperature 145 c figure 1 : test and application circuit. TDA2004A 3/10
figure 2 : p.c. board and component layout of the fig. 1 (scale 1 : 1). figure 4 : quiescent drain current vs. supply voltage. figure 3 : quiescent output voltage vs. supply voltage. TDA2004A 4/10
figure 7 : output power vs. supply voltage. figure 8 : distortion vs. frequency. figure 6 : output power vs. supply voltage. figure 5 : distortion vs. output power. figure 9 : distortion vs. frequency. figure 10 : supply voltage rejection vs. c 3 . TDA2004A 5/10
figure 11 : supply voltage rejection vs. frequency. figure 12 : supply voltage rejection vs. values of capacitors c 2 and c 3 . figure 15 : maximum allowable power dissipation vs. ambient temperature. figure 16 : total power dissipation and efficiency vs. output power. figure 13 : supply voltage rejection vs. values of capacitors c 2 and c 3 . figure 14 : gain vs. input sensitivity. TDA2004A 6/10
figure 17 : total power dissipation and efficiency vs. output power . application suggestion the recommended values of the components are those shown on application circuit of fig.1. different values can be used ; the following table can help the designer. component recomm. value purpose larger than smaller than r1 120k w optimization of the output signal simmetry smaller p o max. smaller p o max. r2, r4 1k w close loop gain setting (*) increase of gain decrease of gain r3, r5 3.3 w decrease of gain increase of gain r6, r7 1 w frequency stability danger of oscillation at high frequency with inductive load c1, c2 2.2 m f input dc decoupling high turn-on delay high turn-on pop higher low frequency cutoff. increase of noise c3 10 m f ripple rejection increase of svr. increase of the switch- on time. degradation of svr. c4, c6 100 m f boostrapping increase of distortion at low frequency c5, c7 100 m f feedback input dc decoupling. c8, c9 0.1 m f frequency stability danger of oscillation. c10, c11 1000 m f to 2200 m f output dc decoupling. higher low-frequency cut-off. (*) the closedCloop gain must be higher than 26db. TDA2004A 7/10
builtCin protection systems load dump voltage surge the TDA2004A has a circuit which enables it to wi- thstand 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 inserted between the supply and 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 pulse with 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) exceeds 18 v. for this reason the ma- ximum operating supply voltage is 18 v. short circuit (ac conditions) the TDA2004A can withstand an accidental short- circuit from the output to ground caused by a wrong connection during normal working. polarity inversion high current (up to 10 a) can be handled by the de- vice with no damage for a longer period than the blow-out time of a quick 2 a fuse (normally connec- ted in series with the supply). this feature is added to avoid destruction, if during fitting to the car, a mi- stake 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 dio- des 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 28 v with no damage. this could occur during win- ter if two batteries are series connected to crank the engine. thermal shut-down the presence of a thermal limiting circuit offers the following advantages : 1) an overload on 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 jun- ction temperature ; all that happens is the p o (and therefore p tot ) and i d are reduced. the maximum allowable power dissipation depends 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 ther- mal resistance. figure 18. figure 19. TDA2004A 8/10
multiwatt11 package mechanical data dim. mm inch min. typ. max. min. typ. max. a 5 0.197 b 2.65 0.104 c 1.6 0.063 d 1 0.039 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 dia1 3.65 3.85 0.144 0.152 TDA2004A 9/10
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 part ies which may result from its use. no license is granted by implication or otherwise under any patent or patent rights of sgs-thomson microelectronics. speci fica- tions mentioned in t his publication are subject to change without notice. this publication supersedes and repl aces all information pre- viously supplied. sgs-thomson microelectronics products are not authorized for use as critical components in life support dev ices or systems without express written approval of sgs-thomson microelec tronics. ? 1995 sgs-thomson microelectronics - all rights reserved multiwatt? is a registered trademark of sgs-thomson microelec tronics sgs-thomson microelectronics group of comp anies 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. TDA2004A 10/10
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