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TDA8944j 2 x 7 w stereo bridge tied load (btl) audio ampli?er rev. 02 14 february 2000 product speci?cation c c 1. general description the TDA8944j is a dual-channel audio power ampli?er with an output power of 2 7 w at an 8 w load and a 12 v supply. the circuit contains two bridge tied load (btl) ampli?ers with an all-npn output stage and standby/mute logic. the TDA8944j comes in a 17-pin dil-bent-sil (dbs) power package. the TDA8944j is printed-circuit board (pcb) compatible with all other types in the tda894x family. one pcb footprint accommodates both the mono and the stereo products. 2. features n few external components n fixed gain n standby and mute mode n no on/off switching plops n low standby current n high supply voltage ripple rejection n outputs short-circuit protected to ground, supply and across the load n thermally protected n printed-circuit board compatible. 3. applications n mains fed applications (e.g. tv sound) n pc audio n portable audio. 4. quick reference data table 1: quick reference data symbol parameter conditions min typ max unit v cc supply voltage 6 12 18 v i q quiescent supply current v cc =12v; r l = - 2436ma i stb standby supply current - - 10 m a
philips semiconductors TDA8944j 2 x 7 w stereo btl audio ampli?er product speci?cation rev. 02 14 february 2000 2 of 21 9397 750 06861 ? philips electronics n.v. 2000. all rights reserved. 5. ordering information 6. block diagram p o output power thd = 10%; r l =8 w ; v cc =12v 67- w thd total harmonic distortion p o = 1 w - 0.03 0.1 % g v voltage gain 31 32 33 db svrr supply voltage ripple rejection 50 65 - db table 1: quick reference data continued symbol parameter conditions min typ max unit table 2: ordering information type number package name description version TDA8944j dbs17p plastic dil-bent-sil power package; 17 leads (lead length 12 mm) sot243-1 fig 1. block diagram. i dth mbk933 standby/ mute logic short circuit and temperature protection 20 k w 20 k w 9 12 17 14 10 11 v cc1 v cc 2 3 out2 + gnd1 15 gnd2 svr out2 - in2 - in2 + 8 TDA8944j 6 4 1 v cc2 16 out1 + out1 - in1 - in1 + mode
philips semiconductors TDA8944j 2 x 7 w stereo btl audio ampli?er product speci?cation rev. 02 14 february 2000 3 of 21 9397 750 06861 ? philips electronics n.v. 2000. all rights reserved. 7. pinning information 7.1 pinning 7.2 pin description fig 2. pin con?guration. handbook, halfpage TDA8944j mbk936 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 out1 - gnd1 v cc1 out1 + n.c. in1 + n.c. in1 - in2 - mode svr in2 + n.c. out2 + gnd2 v cc2 out2 - table 3: pin description symbol pin description out1 - 1 negative loudspeaker terminal 1 gnd1 2 ground channel 1 v cc1 3 supply voltage channel 1 out1 + 4 positive loudspeaker terminal 1 n.c. 5 not connected in1 + 6 positive input 1 n.c. 7 not connected in1 - 8 negative input 1 in2 - 9 negative input 2 mode 10 mode selection input (standby, mute, operating) svr 11 half supply voltage decoupling (ripple rejection) in2 + 12 positive input 2
philips semiconductors TDA8944j 2 x 7 w stereo btl audio ampli?er product speci?cation rev. 02 14 february 2000 4 of 21 9397 750 06861 ? philips electronics n.v. 2000. all rights reserved. 8. functional description the TDA8944j is a stereo btl audio power ampli?er capable of delivering 2 7w output power to an 8 w load at thd = 10%, using a 12 v power supply and an external heatsink. the voltage gain is ?xed at 32 db. with the three-level mode input the device can be switched from standby to mute and to operating mode. the TDA8944j outputs are protected by an internal thermal shutdown protection mechanism and a short-circuit protection. 8.1 input con?guration the TDA8944j inputs can be driven symmetrical (?oating) as well as asymmetrical. in the asymmetrical mode one input pin is connected via a capacitor to the signal ground which should be as close as possible to the svr (electrolytic) capacitor ground. note that the dc level of the input pins is half of the supply voltage v cc , so coupling capacitors for both pins are necessary. the input cut-off frequency is: (1) for r i =45k w and c i = 220 nf: (2) as shown in equation 1 and 2 , large capacitor values for the inputs are not necessary ; so the switch-on delay during charging of the input capacitors, can be minimized. this results in a good low frequency response and good switch-on behaviour. remark: to prevent hf oscillations do not leave the inputs open, connect a capacitor of at least 1.5 nf across the input pins close to the device. n.c. 13 not connected out2 - 14 negative loudspeaker terminal 2 gnd2 15 ground channel 2 v cc2 16 supply voltage channel 2 out2+ 17 positive loudspeaker terminal 2 table 3: pin description continued symbol pin description f icut off C () 1 2r i c i () C ------------------------------ - = f i cut off C () 1 24510 3 220 10 9 C () C ------------------------------------------------------------------ - 16 hz ==
philips semiconductors TDA8944j 2 x 7 w stereo btl audio ampli?er product speci?cation rev. 02 14 february 2000 5 of 21 9397 750 06861 ? philips electronics n.v. 2000. all rights reserved. 8.2 power ampli?er the power ampli?er is a bridge tied load (btl) ampli?er with an all-npn output stage, capable of delivering a peak output current of 2 a. the btl principle offers the following advantages: ? lower peak value of the supply current ? the ripple frequency on the supply voltage is twice the signal frequency ? no expensive dc-blocking capacitor ? good low frequency performance. 8.2.1 output power measurement the output power as a function of the supply voltage is measured on the output pins at thd = 10%; see figure 8 . the maximum output power is limited by the maximum supply voltage of 12 v and the maximum available output current: 2 a repetitive peak current. 8.2.2 headroom typical cd music requires at least 12 db (factor 15.85) dynamic headroom C compared to the average power output C for transferring the loudest parts without distortion. at v cc =12v, r l =8 w and p o = 4 w at thd = 0.1% (see figure 6 ), the average listening level (all) C music power C without any distortion yields: p o(all) = 4 w/15.85 = 252 mw. the power dissipation can be derived from figure 11 on page 10 for 0 db respectively 12 db headroom. for the average listening level a power dissipation of 4 w can be used for a heatsink calculation. 8.3 mode selection the TDA8944j has three functional modes, which can be selected by applying the proper dc voltage to pin mode. see figure 4 and 5 for the respective dc levels, which depend on the supply voltage level. the mode pin can be driven by a 3-state logic output stage: e.g. a microcontroller with additional components for dc-level shifting. standby in this mode the current consumption is very low and the outputs are ?oating. the device is in standby mode when (v cc - 0.5 v) < v mode TDA8944j will be reduced to <0.18 mw. table 4: power rating as function of headroom headroom power output (thd = 0.1%) power dissipation (p) 0 db p o =4w 8w 12 db p o(all) = 252 mw 4 w
philips semiconductors TDA8944j 2 x 7 w stereo btl audio ampli?er product speci?cation rev. 02 14 february 2000 6 of 21 9397 750 06861 ? philips electronics n.v. 2000. all rights reserved. mute in this mode the ampli?er is dc-biased but not operational (no audio output); t he dc level of the input and output pins remain on half the supply voltage. this allows the input coupling and supply voltage ripple rejection (svrr) capacitors to be charged to avoid pop-noise. the device is in mute mode when 3vTDA8944j contains two types of protection circuits, i.e. short-circuit and thermal shutdown. 8.5.1 short-circuit protection short-circuit to ground or supply line this is detected by a so-called missing current detection circuit which measures the current in the positive supply line and the current in the ground line. a difference between both currents larger than 0.4 a, switches the power stage to standby mode (high impedance). short-circuit across the load this is detected by an absolute-current measurement. an absolute-current larger than 2 a, switches the power stage to standby mode (high impedance). 8.5.2 thermal shutdown protection the junction temperature is measured by a temperature sensor; at a junction temperature of approximately 150 c this detection circuit switches the power stage to standby mode (high impedance).
philips semiconductors TDA8944j 2 x 7 w stereo btl audio ampli?er product speci?cation rev. 02 14 february 2000 7 of 21 9397 750 06861 ? philips electronics n.v. 2000. all rights reserved. 9. limiting values 10. thermal characteristics 11. static characteristics [1] with a load connected at the outputs the quiescent current will increase, the maximum of this increase being equal to the di fferential output voltage offset (d v out ) divided by the load resistance (r l ). [2] the dc output voltage with respect to ground is approximately 0.5v cc . [3] d v out = ? v out+ - v out - ? table 5: limiting values in accordance with the absolute maximum rating system (iec 60134). symbol parameter conditions min max unit v cc supply voltage no signal - 0.3 +25 v operating - 0.3 +18 v v i input voltage - 0.3 v cc + 0.3 v i orm repetitive peak output current - 2 a t stg storage temperature non-operating - 55 +150 c t amb operating ambient temperature - 40 +85 c p tot total power dissipation - 18 w v cc(sc) supply voltage to guarantee short-circuit protection -15v table 6: thermal characteristics symbol parameter conditions value unit r th(j-a) thermal resistance from junction to ambient in free air 40 k/w r th(j-mb) thermal resistance from junction to mounting base both channels driven 6.9 k/w table 7: static characteristics v cc =12v; t amb =25 c; r l =8 w ; v mode =0v; v i = 0 v; measured in test circuit figure 14 ; unless otherwise speci?ed. symbol parameter conditions min typ max unit v cc supply voltage operating 6 12 18 v i q quiescent supply current r l = [1] - 2436ma i stb standby supply current v mode =v cc --10 m a v o dc output voltage [2] -6-v d v out [3] differential output voltage offset - - 200 mv v mode mode selection input voltage operating mode 0 - 0.5 v mute mode 3 - v cc - 1.5 v standby mode v cc - 0.5 - v cc v i mode mode selection input current 0 < v mode philips semiconductors TDA8944j 2 x 7 w stereo btl audio ampli?er product speci?cation rev. 02 14 february 2000 8 of 21 9397 750 06861 ? philips electronics n.v. 2000. all rights reserved. 12. dynamic characteristics [1] the noise output voltage is measured at the output in a frequency range from 20 hz to 20 khz (unweighted), with a source impedan ce r s =0 w at the input. [2] supply voltage ripple rejection is measured at the output, with a source impedance r s =0 w at the input. the ripple voltage is a sine wave with a frequency f ripple and an amplitude of 707 mv (rms), which is applied to the positive supply rail. [3] output voltage in mute mode is measured with an input voltage of 1 v (rms) in a bandwidth of 20 khz, so including noise. fig 3. quiescent current as function of supply voltage. fig 4. quiescent current as function of mode voltage. handbook, halfpage 50 40 30 20 10 0 0481216 v cc (v) i q (ma) 20 mgl954 handbook, halfpage 50 40 30 20 10 0 0481216 v mode (v) i q (ma) 20 mgl955 v cc = 12 v table 8: dynamic characteristics v cc =12v; t amb =25 c; r l =8 w ; f = 1 khz; v mode = 0 v; measured in test circuit figure 14 ; audio pass band 22 hz to 22 khz; unless otherwise speci?ed. symbol parameter conditions min typ max unit p o output power thd = 10% 6 7 - w thd = 0.5% 4 5 - w thd total harmonic distortion p o = 1 w - 0.03 0.1 % g v voltage gain 31 32 33 db z i(dif) differential input impedance 70 90 110 k w v n(o) noise output voltage [1] - 90 120 m v svrr supply voltage ripple rejection f ripple = 1 khz [2] 50 65 - db f ripple = 100 hz to 20 khz [2] -60-db v o(mute) output voltage mute mode [3] --50 m v a cs channel separation r s =0 w 50 75 - db
philips semiconductors TDA8944j 2 x 7 w stereo btl audio ampli?er product speci?cation rev. 02 14 february 2000 9 of 21 9397 750 06861 ? philips electronics n.v. 2000. all rights reserved. fig 5. output voltage as function of mode voltage. no bandpass ?lter applied. fig 6. total harmonic distortion as function of output power. fig 7. total harmonic distortion as function of frequency. handbook, full pagewidth 20 16 v mode (v) 12 mgl957 8 4 0 v o (v) 10 1 10 - 3 10 - 2 10 - 1 10 - 4 10 - 5 v cc = 12 v handbook, halfpage thd (%) 10 - 2 10 2 10 1 10 - 1 p o (w) 10 2 10 1 10 - 1 10 - 2 mgl952 v cc = 12 v handbook, halfpage thd (%) 10 10 5 10 2 10 3 10 4 f (hz) 1 10 10 - 1 10 - 2 mgl953 p o = 0.1 w 1 w
philips semiconductors TDA8944j 2 x 7 w stereo btl audio ampli?er product speci?cation rev. 02 14 february 2000 10 of 21 9397 750 06861 ? philips electronics n.v. 2000. all rights reserved. thd = 10%. fig 8. output power as function of supply voltage. fig 9. total power dissipation as function of supply voltage. v cc =12v. fig 10. ef?ciency as function of output power. fig 11. power dissipation as function of output power. handbook, halfpage 20 16 12 8 4 0 0481216 v cc (v) p o (w) 20 mgl959 r l = 8 w 16 w handbook, halfpage 20 16 12 8 4 0 0481216 v cc (v) p tot (w) 20 mgl960 r l = 8 w 16 w handbook, halfpage 100 80 60 40 20 0 02468 p o (w) h (%) 10 mgl962 r l = 16 w 8 w handbook, halfpage 10 8 6 4 2 0 02468 p o (w) p (w) 10 mgl961 r l = 8 w 16 w
philips semiconductors TDA8944j 2 x 7 w stereo btl audio ampli?er product speci?cation rev. 02 14 february 2000 11 of 21 9397 750 06861 ? philips electronics n.v. 2000. all rights reserved. no bandpass ?lter applied. fig 12. channel separation as function of frequency. v cc = 12 v; r s =0 w ; v ripple = 707 mv (peak-to-peak); no bandpass ?lter applied. curves a: inputs short-circuited curves b: inputs short-circuited and connected to ground (asymmetrical application) fig 13. supply voltage ripple rejection as function of frequency. handbook, halfpage 0 - 20 - 40 - 60 - 80 - 100 10 10 2 10 3 10 4 10 5 f (hz) a cs (db) mgl958 handbook, full pagewidth svrr (db) 10 2 10 3 10 4 10 5 10 f (hz) - 20 0 - 40 - 60 - 80 mgl956 ch2 b a ch1
philips semiconductors TDA8944j 2 x 7 w stereo btl audio ampli?er product speci?cation rev. 02 14 february 2000 12 of 21 9397 750 06861 ? philips electronics n.v. 2000. all rights reserved. 13. internal circuitry table 9: internal circuitry pin symbol equivalent circuit 6 and 8 in1+ and in1 - 12 and 9 in2+ and in2 - 1 and 4 out1 - and out1+ 14 and 17 out2 - and out2+ 10 mode 11 svr 1.5 k w 1.5 k w 45 k w 45 k w v cc v cc v cc mgl946 1 : 1 1 : 1 1/2 v cc (svr) 8, 9 6, 12 40 w 100 w mgl947 1, 4, 14, 17 1/2 v cc 1 k w 10 k w 10 k w off high mute high 1 k w v cc v cc v cc mgl949 10 standby 20 k w 20 k w v cc mgl948 11
philips semiconductors TDA8944j 2 x 7 w stereo btl audio ampli?er product speci?cation rev. 02 14 february 2000 13 of 21 9397 750 06861 ? philips electronics n.v. 2000. all rights reserved. 14. application information 14.1 printed-circuit board (pcb) 14.1.1 layout and grounding for a high system performance level certain grounding techniques are essential. the input reference grounds have to be tied with their respective source grounds and must have separate tracks from the power ground tracks; this will prevent the large (output) signal currents from interfering with the small ac input signals. the small-signal ground tracks should be physically located as far as possible from the power ground tracks. supply and output tracks should be as wide as possible for delivering maximum output power. fig 14. application diagram. f ull pagewidth 3 16 out1 - - - - + + + + - r l 8 w r i 45 k w r s symmetrical input r i 45 k w r l 8 w out1 + in1 - in1 + out2 - out2 + gnd mgl950 in2 - in2 + mode svr 1 8 220 nf 6 9 12 10 11 4 14 17 15 2 + v cc 1000 m f 100 nf 20 k w 20 k w 10 m f - - - + + + + - r i 45 k w r i 45 k w r c1 c2 r v cc v cc signal gnd TDA8944j signal gnd short circuit and temperature protection standby/ mute logic microcontroller standby mode mute on 0 0 1 0 c1 c2 1 0 1/2 v cc 220 nf 1.5 nf 1.5 nf c i r s asymmetrical input 220 nf 220 nf c i 1/2 v cc 1/2 v cc 1/2 v cc 1/2 v cc
philips semiconductors TDA8944j 2 x 7 w stereo btl audio ampli?er product speci?cation rev. 02 14 february 2000 14 of 21 9397 750 06861 ? philips electronics n.v. 2000. all rights reserved. 14.1.2 power supply decoupling proper supply bypassing is critical for low-noise performance and high supply voltage ripple rejection. the respective capacitor locations should be as close as possible to the device and grounded to the power ground. proper power supply decoupling also prevents oscillations. for suppressing higher frequency transients (spikes) on the supply line a capacitor with low esr C typical 100 nf C has to be placed as close as possible to the device. for suppressing lower frequency noise and ripple signals, a large electrolytic capacitor C e.g. 1000 m f or greater C must be placed close to the device. the bypass capacitor on the svr pin reduces the noise and ripple on the midrail voltage. for good thd and noise performance a low esr capacitor is recommended. fig 15. printed-circuit board layout (single-sided); components view. i dth mgl951 on mute 220 nf 100 nf 1.5 nf 1000 m f 10 m f 220 nf 1 17 +- in2 - in2 + in1 - in1 + out1 - out1 + out2 - out2 + v cc gnd 54 mm 56 mm
philips semiconductors TDA8944j 2 x 7 w stereo btl audio ampli?er product speci?cation rev. 02 14 february 2000 15 of 21 9397 750 06861 ? philips electronics n.v. 2000. all rights reserved. 14.2 thermal behaviour and heatsink calculation the measured maximum thermal resistance of the ic package, r th(j-mb) is 6.9 k/w. a calculation for the heatsink can be made, with the following parameters: t amb(max) =50 c v cc = 12 v and r l =8 w t j(max) = 150 c. r th(tot) is the total thermal resistance between the junction and the ambient including the heatsink. in the heatsink calculations the value of r th(mb-h) is ignored. at v cc = 12 v and r l =8 w the measured worstcase sine-wave dissipation is 8 w; see figure 11 . for t j(max) = 150 c the temperature raise - caused by the power dissipation - is: 150 C 50 = 100 c. p r th(tot) = 100 c r th(tot) = 100/8 = 12.5 k/w r th(h-a) =r th(tot) Cr th(j-mb) = 12.5 C 6.9 = 5.6 k/w. the calculation above is for an application at worstcase (stereo) sine-wave output signals. in practice music signals will be applied, which decreases the maximum power dissipation to approximately half of the sine-wave power dissipation (see section 8.2.2 ). this allows for the use of a smaller heatsink: p r th(tot) = 100 c r th(tot) = 100/4 = 25 k/w r th(h-a) =r th(tot) Cr th(j-mb) = 25 C 6.9 = 18.1 k/w. to increase the lifetime of the ic, t j(max) should be reduced to 125 c. this requires a heatsink of approximately 12 k/w for music signals. 15. test information 15.1 quality information the general quality speci?cation for integrated circuits, snw-fq-611d is applicable. 15.2 test conditions t amb =25 c; v cc = 12 v; f = 1 khz; r l =8 w ; audio pass band 22 hz to 22 khz; unless otherwise speci?ed. remark: in the graphs as function of frequency no bandpass ?lter was applied; see figure 7 , 12 and 13 .
philips semiconductors TDA8944j 2 x 7 w stereo btl audio ampli?er product speci?cation rev. 02 14 february 2000 16 of 21 9397 750 06861 ? philips electronics n.v. 2000. all rights reserved. 16. package outline fig 16. dbs17p package outline. references outline version european projection issue date iec jedec eiaj dimensions (mm are the original dimensions) note 1. plastic or metal protrusions of 0.25 mm maximum per side are not included. sot243-1 0 5 10 mm scale d l e a c a 2 l 3 q w m b p 1 d d z e e x h 117 j e h non-concave 97-12-16 99-12-17 dbs17p: plastic dil-bent-sil power package; 17 leads (lead length 12 mm) sot243-1 view b : mounting base side m 2 e v m b unit a e 1 a 2 b p cd (1) e (1) z (1) de d h ll 3 m mm 17.0 15.5 4.6 4.4 0.75 0.60 0.48 0.38 24.0 23.6 20.0 19.6 10 2.54 v 0.8 12.2 11.8 1.27 e 2 5.08 2.4 1.6 e h 6 2.00 1.45 2.1 1.8 3.4 3.1 4.3 12.4 11.0 q j 0.4 w 0.03 x
philips semiconductors TDA8944j 2 x 7 w stereo btl audio ampli?er product speci?cation rev. 02 14 february 2000 17 of 21 9397 750 06861 ? philips electronics n.v. 2000. all rights reserved. 17. soldering 17.1 introduction to soldering through-hole mount packages this text gives a brief insight to wave, dip and manual soldering. a more in-depth account of soldering ics can be found in our data handbook ic26; integrated circuit packages (document order number 9398 652 90011). wave soldering is the preferred method for mounting of through-hole mount ic packages on a printed-circuit board. 17.2 soldering by dipping or by solder wave the maximum permissible temperature of the solder is 260 c; solder at this temperature must not be in contact with the joints for more than 5 seconds. the total contact time of successive solder waves must not exceed 5 seconds. the device may be mounted up to the seating plane, but the temperature of the plastic body must not exceed the speci?ed maximum storage temperature (t stg(max) ). if the printed-circuit board has been pre-heated, forced cooling may be necessary immediately after soldering to keep the temperature within the permissible limit. 17.3 manual soldering apply the soldering iron (24 v or less) to the lead(s) of the package, either below the seating plane or not more than 2 mm above it. if the temperature of the soldering iron bit is less than 300 c it may remain in contact for up to 10 seconds. if the bit temperature is between 300 and 400 c, contact may be up to 5 seconds. 17.4 package related soldering information [1] for sdip packages, the longitudinal axis must be parallel to the transport direction of the printed-circuit board. table 10: suitability of through-hole mount ic packages for dipping and wave soldering methods package soldering method dipping wave dbs, dip, hdip, sdip, sil suitable suitable [1]
philips semiconductors TDA8944j 2 x 7 w stereo btl audio ampli?er product speci?cation rev. 02 14 february 2000 18 of 21 9397 750 06861 ? philips electronics n.v. 2000. all rights reserved. 18. revision history table 11: revision history rev date cpcn description 02 000214 - product speci?cation; second version; supersedes initial version TDA8944j-01 of 14 april 1999 (9397 750 04881). modi?cations: ? table 1 on page 1 : svrr; typ value 65 db ? added ? figure 1 on page 2 : block diagram; pin numbers changed out2 -? 14 and out2+ ? 17 ? figure 2 on page 3 : pin con?guration; pin numbers changed out2 -? 14 and out2+ ? 17 ? section 8 functional description : C section 8.1 input con?guration on page 4 ? added. C section 8.2 power ampli?er on page 5 : ........, capable of delivering a peak output current of 1.5 a ? changed to 2 a. C section 8.2.1 output power measurement on page 5 ? added C section 8.2.2 headroom on page 5 ? added ? section 8.3 mode selection : C standby mode: v mode >(v cc - 0.5 v) ? changed to (v cc - 0.5 v) < v mode TDA8944j will be reduced to <0.18 mw ? added. C mute mode: the dc level of the input and output pins remain on half the supply voltage ? added; C 2.5 v < v mode <(v cc - 1.5 v) ? changed to 3 v < v mode <(v cc - 1.5 v) C section 8.3.1 switch-on and switch-off on page 6 ? section 8.4 supply voltage ripple rejection (svrr) on page 6 ? added ? section 8.5 built-in protection circuits on page 6 ? added ? table 5 on page 7 : C p tot value added 18 v C v cc(sc) value added 15 v ? table 6 on page 7 : C r th(j-a) value added 40 k/w C r th(j-c) value 10 ? changed to 6.9 k/w; condition in free air ? changed to both channels driven ? table 7 on page 7 : v mode - mute mode - value min 2.5 ? changed to 3 v ? table 8 on page 8 : C svrr; typ values 65 and 60 db ? added C a cs ; typ value 75 db ? added ? figure 3 to 13 : ?gures added ? section 13 internal circuitry on page 12 : ? added ? figure 14 : ?gure adjusted ? section 14.1 printed-circuit board (pcb) on page 13 : ? added ? figure 15 : ?gure added ? section 14.2 thermal behaviour and heatsink calculation on page 15 : ? added ? section 15.2 test conditions on page 15 : ? added 01 990414 - preliminary speci?cation; initial version.
philips semiconductors TDA8944j 2 x 7 w stereo btl audio ampli?er product speci?cation rev. 02 14 february 2000 19 of 21 9397 750 06861 ? philips electronics n.v. 2000 all rights reserved. 19. data sheet status [1] please consult the most recently issued data sheet before initiating or completing a design. 20. de?nitions short-form speci?cation the data in a short-form speci?cation is extracted from a full data sheet with the same type number and title. for detailed information see the relevant data sheet or data handbook. limiting values de?nition limiting values given are in accordance with the absolute maximum rating system (iec 60134). stress above one or more of the limiting values may cause permanent damage to the device. these are stress ratings only and operation of the device at these or at any other conditions above those given in the characteristics sections of the speci?cation is not implied. exposure to limiting values for extended periods may affect device reliability. application information applications that are described herein for any of these products are for illustrative purposes only. philips semiconductors make no representation or warranty that such applications will be suitable for the speci?ed use without further testing or modi?cation. 21. disclaimers life support these products are not designed for use in life support appliances, devices, or systems where malfunction of these products can reasonably be expected to result in personal injury. philips semiconductors customers using or selling these products for use in such applications do so at their own risk and agree to fully indemnify philips semiconductors for any damages resulting from such application. right to make changes philips semiconductors reserves the right to make changes, without notice, in the products, including circuits, standard cells, and/or software, described or contained herein in order to improve design and/or performance. philips semiconductors assumes no responsibility or liability for the use of any of these products, conveys no licence or title under any patent, copyright, or mask work right to these products, and makes no representations or warranties that these products are free from patent, copyright, or mask work right infringement, unless otherwise speci?ed. datasheet status product status de?nition [1] objective speci?cation development this data sheet contains the design target or goal speci?cations for product development. spec i?cation may change in any manner without notice. preliminary speci?cation quali?cation this data sheet contains preliminary data, and supplementary data will be published at a la ter date. philips semiconductors reserves the right to make changes at any time without notice in order to improve design and supply the best possible product. product speci?cation production this data sheet contains ?nal speci?cations. philips semiconductors reserves the right to make ch anges at any time without notice in order to improve design and supply the best possible product.
philips semiconductors TDA8944j 2 x 7 w stereo btl audio ampli?er product speci?cation rev. 02 14 february 2000 20 of 21 9397 750 06861 ? philips electronics n.v. 2000. all rights reserved. philips semiconductors - a worldwide company argentina: see south america australia: tel. +61 2 9704 8141, fax. +61 2 9704 8139 austria: tel. +43 160 101, fax. +43 160 101 1210 belarus: tel. +375 17 220 0733, fax. +375 17 220 0773 belgium: see the netherlands brazil: see south america bulgaria: tel. +359 268 9211, fax. +359 268 9102 canada: tel. +1 800 234 7381 china/hong kong: tel. +852 2 319 7888, fax. +852 2 319 7700 colombia: see south america czech republic: see austria denmark: tel. +45 3 288 2636, fax. +45 3 157 0044 finland: tel. +358 961 5800, fax. +358 96 158 0920 france: tel. +33 14 099 6161, fax. +33 14 099 6427 germany: tel. +49 40 23 5360, fax. +49 402 353 6300 hungary: see austria india: tel. +91 22 493 8541, fax. +91 22 493 8722 indonesia: see singapore ireland: tel. +353 17 64 0000, fax. +353 17 64 0200 israel: tel. +972 36 45 0444, fax. +972 36 49 1007 italy: tel. +39 039 203 6838, fax +39 039 203 6800 japan: tel. +81 33 740 5130, fax. +81 3 3740 5057 korea: tel. +82 27 09 1412, fax. +82 27 09 1415 malaysia: tel. +60 37 50 5214, fax. +60 37 57 4880 mexico: tel. +9-5 800 234 7381 middle east: see italy netherlands: tel. +31 40 278 2785, fax. +31 40 278 8399 new zealand: tel. +64 98 49 4160, fax. +64 98 49 7811 norway: tel. +47 22 74 8000, fax. +47 22 74 8341 philippines: tel. +63 28 16 6380, fax. +63 28 17 3474 poland: tel. +48 22 5710 000, fax. +48 22 5710 001 portugal: see spain romania: see italy russia: tel. +7 095 755 6918, fax. +7 095 755 6919 singapore: tel. +65 350 2538, fax. +65 251 6500 slovakia: see austria slovenia: see italy south africa: tel. +27 11 471 5401, fax. +27 11 471 5398 south america: tel. +55 11 821 2333, fax. +55 11 829 1849 spain: tel. +34 33 01 6312, fax. +34 33 01 4107 sweden: tel. +46 86 32 2000, fax. +46 86 32 2745 switzerland: tel. +41 14 88 2686, fax. +41 14 81 7730 taiwan: tel. +886 22 134 2865, fax. +886 22 134 2874 thailand: tel. +66 27 45 4090, fax. +66 23 98 0793 turkey: tel. +90 216 522 1500, fax. +90 216 522 1813 ukraine: tel. +380 44 264 2776, fax. +380 44 268 0461 united kingdom: tel. +44 208 730 5000, fax. +44 208 754 8421 united states: tel. +1 800 234 7381 uruguay: see south america vietnam: see singapore yugoslavia: tel. +381 11 3341 299, fax. +381 11 3342 553 for all other countries apply to: philips semiconductors, international marketing & sales communications, building be, p.o. box 218, 5600 md eindhoven, the netherlands, fax. +31 40 272 4825 internet: http://www.semiconductors.philips.com (sca69)
? philips electronics n.v. 2000. printed in the netherlands all rights are reserved. reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. the information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice. no liability will be accepted by the publisher for any consequence of its use. publication thereof does not convey nor imply any license under patent- or other industrial or intellectual property rights. date of release: 14 february 2000 document order number: 9397 750 06861 contents philips semiconductors TDA8944j 2 x 7 w stereo btl audio ampli?er 1 general description . . . . . . . . . . . . . . . . . . . . . . 1 2 features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 3 applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 4 quick reference data . . . . . . . . . . . . . . . . . . . . . 1 5 ordering information . . . . . . . . . . . . . . . . . . . . . 2 6 block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . 2 7 pinning information . . . . . . . . . . . . . . . . . . . . . . 3 7.1 pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 7.2 pin description . . . . . . . . . . . . . . . . . . . . . . . . . 3 8 functional description . . . . . . . . . . . . . . . . . . . 4 8.1 input configuration . . . . . . . . . . . . . . . . . . . . . . 4 8.2 power amplifier . . . . . . . . . . . . . . . . . . . . . . . . . 5 8.2.1 output power measurement . . . . . . . . . . . . . . . 5 8.2.2 headroom . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 8.3 mode selection . . . . . . . . . . . . . . . . . . . . . . . . . 5 8.3.1 switch-on and switch-off. . . . . . . . . . . . . . . . . . 6 8.4 supply voltage ripple rejection (svrr) . . . . . 6 8.5 built-in protection circuits . . . . . . . . . . . . . . . . . 6 8.5.1 short-circuit protection . . . . . . . . . . . . . . . . . . . 6 8.5.2 thermal shutdown protection . . . . . . . . . . . . . . 6 9 limiting values . . . . . . . . . . . . . . . . . . . . . . . . . . 7 10 thermal characteristics . . . . . . . . . . . . . . . . . . . 7 11 static characteristics . . . . . . . . . . . . . . . . . . . . . 7 12 dynamic characteristics . . . . . . . . . . . . . . . . . . 8 13 internal circuitry . . . . . . . . . . . . . . . . . . . . . . . . 12 14 application information . . . . . . . . . . . . . . . . . . 13 14.1 printed-circuit board (pcb). . . . . . . . . . . . . . . 13 14.1.1 layout and grounding . . . . . . . . . . . . . . . . . . . 13 14.1.2 power supply decoupling . . . . . . . . . . . . . . . . 14 14.2 thermal behaviour and heatsink calculation . 15 15 test information . . . . . . . . . . . . . . . . . . . . . . . . 15 15.1 quality information . . . . . . . . . . . . . . . . . . . . . 15 15.2 test conditions . . . . . . . . . . . . . . . . . . . . . . . . 15 16 package outline . . . . . . . . . . . . . . . . . . . . . . . . 16 17 soldering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 17.1 introduction to soldering through-hole mount packages . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 17.2 soldering by dipping or by solder wave . . . . . 17 17.3 manual soldering . . . . . . . . . . . . . . . . . . . . . . 17 17.4 package related soldering information . . . . . . 17 18 revision history . . . . . . . . . . . . . . . . . . . . . . . . 18 19 data sheet status . . . . . . . . . . . . . . . . . . . . . . . 19 20 definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 21 disclaimers . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

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