TDA2003 10w car radio audio amplifier TDA2003 g e n e r a l d e s c r i p t i o n the TDA2003 is suitable for use as audio am plifier in cassette tape player.the device provides a high output current capacity (up to 3.5a) very low harm onic and crossover distortion. com p letely safe operation is guaranteed due to protection against dc and ac short circuit between all pins and ground, therm a l over-range, load dum p voltage surge up to 40v and fortuitous open ground. absolute maximum ra tings (t a=25 c) c h a r a c t e r i s t i c s s y m b o l v a l u e u n i t s peak supply v o ltage vs 40 v dc supply v o ltage vs 28 v operating supply v o ltage vs 18 v output peak current (repetitive) io 3.5 a output peak current (non repetitive) io 4.5 a power dissipation at t case=90 c p t o t 2 0 w s t orage t e m p erature t s tg -40~+150 c junction t e m p erature tj -40~+150 c pin connection 5 4 3 2 1 n on inverting inpu t output ground inverting input supply voltage tiger electronic co.,ltd
TDA2003 schema tic diagram test circuit c1 1.0uf rx 39 c2 470uf TDA2003 c4 1000uf r1 220 r2 2.2 r3 1 100nf cx 39nf 100uf c3 100nf +vcc vi rl 1 2 3 4 5 c5 470uf TDA2003 c4 1000uf r1220 r2 2.2 100nf +vcc rl 1 2 3 4 5 v ma 100nf rx=20*r2 cx=1/(2 b*r1) d c t e s t c i r c u i t a c t e s t c i r c u i t
TDA2003 electrical characteristics ( refer to the test circuit ,vcc= 16v,ta=25 c) characteristics symbol test conditions min typ max unit dc characteristics supply voltage vcc 8 18 v quiescent output voltage vo 6.1 6.9 7.7 v quiescent drain current id 40 55 ma ac characteristics r l =8 ? 5.5 6 r l =2 ? 9 10 r l =3.2 ? 7.5 output power po thd=10%, f=1khz r l =1.6 ? 12 w po=0.5w, r l =4 ? 14 po=6w, r l =4 ? 55 po=0.5w, r l =2 ? 10 input sensitivity vi f=1khz po=10w, r l =2 ? 50 mv input saturation voltage vi(rms) 300 mv frequency response(-3db) b po=1w, r l =4 ? 40 15000 hz po=0.05w to 4.5w, r l =4 ? 0.15 distortion thd f=1khz po=0.05w to 7.5w, r l =2 ? 0.15 % input resistance (pin 1) ri open loop f=1khz 70 150 k ? input noise current e n 60 200 pa input noise voltage i n 1 5 v f=1khz 80 open loop voltage gain gvo f=10khz 60 db closed loop voltage gain gvc f=1khz, r l =2 ? 39.3 40 40.3 db po=6w, r l =4 ? 69 efficiency f=1khz po=10w, r l =2 ? 65 % supply voltage rejection svr vripple=0.5v,f=100hz, rg=10k? , r l =4 ? 30 36 db
TDA2003 applica t ion circuit c1 1.0uf rx 39 c2 470uf 2003 c4 1000uf r1 220 r2 2. 2 r3 1 100nf cx 39nf 100uf c3 100nf +vcc vi rl 1 2 3 4 5 c5 t y pical application circuit 2.2uf 10uf 2003 15uf 1 200 430 0.1uf 0.1uf vcc=14.4v rl=4 1 2 3 4 5 16 16 2.2uf d2003 1 2 3 4 5 c3 c4 20w bridge configuration application the v a lue of the capacitors c3 and c4 are dif f erent to optim ize the svr (t y p . 40db) 2003 15uf 0.1uf 1nf vcc=14.4v rl=4 1 2 3 4 5 620 2003 1 2 3 4 5 0.1uf 0.1uf 0.1uf 0.1uf c3 low cost bridge configuration application circuit (po=18w)
TDA2003 built-in protection systems load dum p voltage surge the TDA2003 has a circuit which enables it to withstand a voltage pulse train, on pin 5, of the ty pe shown in fig. 2. if the supply voltage peaks to m o re than 40v, then an lc filter m u st be inserted between the supply and pin 5, in order to assure that the pulses at pin 5 will be head within the lim its shown in fig.1. a suggested lc network is shown in fig.2.w ith this network, a train of pulses with am plitude up to 120v and width of 2m s can be applied at point a. this ty pe of protection is on when the supply voltage (pulsed or dc ) exceeds 18v.for this reason the m a xim u m operating supply voltage is 18v. f i g u r e 1 f i g u r e 2 short circuit (ac and dc conditions ) the tda 2003 can withstand a permanent short-circuit on the output for a supply voltage up to 16v. polarity inversion high current (up to 5a) can be handled by the device with no dam a ge for a longer period than the blow-out tim e of a quick 1a fuse(nor m a lly connected in series with the supply ) . the feature is added to avoid destructi on if, during fitting to the car, a m i stake on connection of the supply is m a de. open gr ound when the radio is in the on condition and the ground is accidentally opened, a standard audio am plifier will be dam a ged. on the tda 2003 protection diodes are included to avoid any dam a ge.
TDA2003 inductive load a protection diode is provide between pin 4 and pin 5(see the internal schematic diagram) to allow use of the TDA2003 with inductive lo ads. in particular, the TDA2003 can drive a coupling transformer for audio modulation. dc voltage the maximum operating dc voltage on the TDA2003 is 18v. however the device can withstand a dc voltage up to 28v with no damage. this could occur during winter if two batteries were 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 heat-sink can have a smaller factor compared with that of a conventional circuit. there is no device damage in case of excessive junction temperature: all that happens is that po( and there ptot) and id are reduced. application suggestion the recommended values of the components ar e those shown on application circuit of typical application circuit. different values can be used .the following table can help the designer. component recommended value purpose smaller than recommended value large than recommended value r1 (gv-1)*r2 gain setting increase of gain r2 2.2 ? gain and svr setting decrease of svr r3 1 ? frequency stability danger of oscillation at high frequency with inductive loads. rx =20*r2 upper frequency cut off poor high frequencies attenuation danger of oscillation c1 2.2 f input dc decoupling noise at switch-on switch-off c2 470 f ripple rejection decrease of svr c3 0.1 f supply voltage by pass danger of oscillation c4 1000 f supply voltage by pass higher low frequency cut off
TDA2003 (continue) com ponent recom m e nded value purpose large than recom m e nded value large than recom m e nded value c5 0.1 f frequency stability danger of oscillation at high frequencies with inductive loads cx 1/(2 *b*r1 ) upper frequency cut off sm all bandwidth large bandwidth characteristics curves quiescent output voltage quiescent drain current output power vs. vs. supply voltage vs. supply voltage supply voltage output power vs. load gain vs. input sensitivity gain vs. input sensitivity resistance
TDA2003 distortion vs. distortion vs. supply voltage rejection o u t p u t p o w e r f r e q u e n c y v s . v o l t a g e g a i n supply voltage rejection power dissipation and power dissipation and v s . f r e q u e n c y e f f i c i e n c y v s . o u t p u t e f f i c i e n c y v s . o u t p u t p o w e r ( r l = 4 ? ) p o w e r ( r l = 2 ? ) maxim u m power dissipation maxim u m allowable ty pical values of capacitor and supply voltage (sine dissipation and am bient (cx) for different values of wave operation) tem p erature frequency response
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