View TDA7564_839551.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

1/20 TDA7564 september 2003 n dmos power output n non-switching hi-efficiency n high output power capability 4x28w/4 w @ 14.4v, 1khz, 10% thd, 4x40w eiaj n max. output power 4x72w/2 w n full i 2 c bus driving: Cst-by C independent front/rear soft play/ mute C selectable gain 26db - 12db (for low noise line output function) C high efficiency enable/disable Ci 2 c bus digital diagnostics n full fault protection n dc offset detection n four independent short circuit protection n clipping detector (2% - 10%) protection description the TDA7564 is a new bcd technology quad bridge type of car radio amplifier in flexiwatt25 package specially intended for car radio applica- tions. thanks to the dmos output stage the TDA7564 has a very low distortion allowing a clear powerful sound. among the features, its superior efficiency performance coming from the internal exclusive structure, makes it the most suitable de- vice to simplify the thermal management in high power sets.the dissipated output power under av- erage listening condition is in fact reduced up to 50% when compared to the level provided by con- ventional class ab solutions.this device is equipped with a full diagnostics array that commu- nicates the status of each speaker through the i 2 c bus.the possibility to control the configuration and behaviour of the device by means of the i 2 c bus makes TDA7564 a very flexible machine. ordering number: TDA7564 flexiwatt25 multifunction quad power amplifier with built-in diagnostics features block diagram i2cbus thermal protection & dump reference cd_out data clk out rf+ short circuit protection & diagnostic clip detector mute1 mute2 12/26db vcc2 vcc1 12/26db 12/26db 12/26db short circuit protection & diagnostic short circuit protection & diagnostic short circuit protection & diagnostic out rf- out rr+ out rr- out lf+ out lf- out lr+ out lr- ac_gnd rf rr lf pw_gnd lr in lr s_gnd tab svr in lf in rr in rf d00au1211 multipower bcd technology mosfet output power stage
TDA7564 2/20 absolute maximum ratings thermal data pin connection (top view) symbol parameter value unit v op operating supply voltage 18 v v s dc supply voltage 28 v v peak peak supply voltage (for t = 50ms) 50 v v ck ck pin voltage 6 v v data data pin voltage 6 v i o output peak current (not repetitive t = 100ms) 8 a i o output peak current (repetitive f > 10hz) 6 a p tot power dissipation t case = 70c 85 w t stg , t j storage and junction temperature -55 to 150 c symbol parameter value unit r th j-case thermal resistance junction to case max. 1 c/w d99au1037 tab pw_gnd lr out lr- cd-out out lr+ v cc1 out lf- pw_gnd lf out lf+ svr in lf in lr s gnd in rr in rf ac gnd out rf+ pw_gnd rf out rf- v cc2 out rr+ ck out rr- pw_gnd rr data 1 25 2 3 4 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 22 23 24
3/20 TDA7564 figure 1. application circuit in rf c1 0.22 m f in rr c2 0.22 m f out rf out rr in lf c3 0.22 m f in lr c4 0.22 m f out lf out lr d00au1212 c5 1 m f c6 10 m f tab 47k - + - + - + - + vcc1 vcc2 c8 0.1 m f c7 3300 m f data i 2 c bus clk 12 11 14 15 22 25 13 s-gnd 16 10 4 cd out v 620 17 18 19 21 24 23 9 8 7 5 2 3 1
TDA7564 4/20 electrical characteristics (refer to the test circuit, v s = 14.4v; r l = 4 w ; f = 1khz; t amb = 25c; unless otherwise specified.) symbol parameter test condition min. typ. max. unit power amplifier v s supply voltage range 8 18 v i d total quiescent drain current 170 300 ma p o output power eiaj (v s = 13.7v) 35 40 w thd = 10% thd = 1% 25 28 22 w w r l = 2 w ; eiaj (v s = 13.7v) r l = 2 w ; thd 10% r l = 2 w ; thd 1% r l = 2 w ; max power 55 40 62 46 35 72 w w w w thd total harmonic distortion p o = 1w to 10w; std mode he mode; p o = 1.5w he mode; p o = 8w 0.02 0.015 0.15 0.1 0.1 0.5 % % % g v = 12db; std mode v o = 0.1 to 5vrms 0.02 0.05 % c t cross talk f = 1khz to 10khz, r g = 600 w 50 60 db r in input impedance 60 100 130 k w g v1 voltage gain 1 25 26 27 db d g v1 voltage gain match 1 -1 1 db g v2 voltage gain 2 11 12 13 db d g v2 voltage gain match 2 -1 1 db e in1 output noise voltage 1 r g = 600 w , 20hz to 22khz 35 100 m v e in2 output noise voltage 2 r g = 600 w ; gv = 12db 20hz to 22khz 12 30 m v svr supply voltage rejection f = 100hz to 10khz; v r = 1vpk; r g = 600 w 50 60 db bw power bandwidth 100 khz a sb stand-by attenuation 90 110 db i sb stand-by current consumption 25 100 m a a m mute attenuation 80 100 db v os offset voltage mute & play -100 0 100 mv t on turn on delay d2/d1 (ib1) 0 to 1 20 40 ms t off turn off delay d2/d1 (ib1) 1 to 0 20 40 ms v am min. supply mute threshold 7 7.5 8 v cd lk clip det high leakage current cd off 0 15 m a cd sat clip det sat. voltage cd on; i cd = 1ma 150 300 mv cd thd clip det thd level d0 (ib1) = 0 1 2 3 % d0 (ib1) = 1 5 10 15 % turn on diagnostics 1 (power amplifier mode) pgnd short to gnd det. (below this limit, the output is considered in short circuit to gnd) power amplifier in st-by 1.2 v pvs short to vs det. (above this limit, the output is considered in short circuit to vs) vs -1.2 v
5/20 TDA7564 pnop normal operation thresholds. (within these limits, the output is considered without faults). power amplifier in st-by 1.8 vs -1.8 v lsc shorted load det. 0.5 w lop open load det. 85 w lnop normal load det. 1.75 45 w turn on diagnostics 2 (line driver mode) pgnd short to gnd det. (below this limit, the output is considered in short circuit to gnd) power amplifier in st-by 1.2 v pvs short to vs det. (above this limit, the output is considered in short circuit to v s ) vs -1.2 v pnop normal operation thresholds. (within these limits, the output is considered without faults). 1.8 vs -1.8 v lsc shorted load det. 2 w lop open load det. 330 w lnop normal load det. 7 180 w permanent diagnostics 2 (power amplifier mode or line driver mode) pgnd short to gnd det. (below this limit, the output is considered in short circuit to gnd) power amplifier in mute or play, one or more short circuits protection activated 1.2 v pvs short to vs det. (above this limit, the output is considered in short circuit to v s ) vs -1.2 v pnop normal operation thresholds. (within these limits, the output is considered without faults). 1.8 vs -1.8 v l sc shorted load det. pow. amp. mode 0.5 w line driver mode 2 w v o offset detection power amplifier in play, ac input signals = 0 1.5 2 2.5 v i nl normal load current detection v o < (v s - 5)pk 500 ma i ol open load current detection v o < (v s - 5)pk 250 ma i 2 c bus interface f scl clock frequency 400 khz v il input low voltage 1.5 v v ih input high voltage 2.3 v electrical characteristics (continued) (refer to the test circuit, v s = 14.4v; r l = 4 w ; f = 1khz; t amb = 25c; unless otherwise specified.) symbol parameter test condition min. typ. max. unit
TDA7564 6/20 figure 2. quiescent current vs. supply voltage figure 3. output power vs. supply voltage (4 w ) figure 4. output power vs. supply voltage (2 w ) figure 5. distortion vs. output power (4 w , std) figure 6. distortion vs. output power (4 w , hi-eff) figure 7. distortion vs. output power (2 w , std) 8 1012141618 vs ( v ) 70 90 110 130 150 170 190 210 230 250 id (ma) vin = 0 no loads 8 9 10 11 12 13 14 15 16 17 18 vs ( v ) 5 10 15 20 25 30 35 40 45 50 55 60 65 70 po (w) rl = 4 ohm f = 1 khz thd = 10 % thd = 1 % po-max 8 9 10 11 12 13 14 15 16 vs ( v ) 10 20 30 40 50 60 70 80 90 100 po (w) rl = 2 ohm f = 1 khz thd = 10 % thd = 1 % po-max po ( w ) 0.1 1 10 0.01 0.1 1 10 thd (%) f = 10 khz f = 1 khz standard mode vs = 14.4 v rl = 4 ohm 0.1 1 10 po ( w ) 0.001 0.01 0.1 1 10 thd (%) f = 10 khz f = 1 khz hi-eff mode vs = 14.4 v rl = 4 ohm 0.1 1 10 po ( w ) 0.01 0.1 1 10 thd (%) f = 10 khz f = 1 khz standard mode vs = 14.4 v rl = 2 ohm
7/20 TDA7564 figure 8. distortion vs. frequency (4 w ) figure 9. distortion vs. frequency (2 w ) figure 10. crosstalk vs. frequency figure 11. supply voltage rejection vs. freq. figure 12. power dissipation & efficiency vs. output power (4 w , std, sine) figure 13. power dissipation & efficiency vs. output power (4w, hi-eff, sine) 10 100 1000 10000 f ( hz ) 0.01 0.1 1 10 thd (%) standard mode vs = 14.4 v rl = 4 ohm po = 4 w 10 100 1000 10000 f ( hz ) 0.1 1 10 thd (%) standard mode vs = 14.4 v rl = 2 ohm po = 8 w 10 100 1000 10000 f ( hz ) 20 30 40 50 60 70 80 90 crosstalk (db) standard mode rl = 4 ohm po = 4 w rg = 600 ohm 10 100 1000 10000 f ( hz ) 20 30 40 50 60 70 80 90 svr (db) std & he mode rg = 600 ohm vripple = 1 vpk 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 po ( w ) 0 10 20 30 40 50 60 70 80 90 ptot (w) 0 10 20 30 40 50 60 70 80 90 n (%) ptot standard mode vs = 14.4 v rl = 4 x 4 ohm f = 1 khz sine n 0.1 1 10 po ( w ) 0 10 20 30 40 50 60 70 80 90 ptot (w) 0 10 20 30 40 50 60 70 80 90 n (%) n ptot hi-eff mode vs = 14.4 v rl = 4 x 4 ohm f = 1 khz sine
TDA7564 8/20 figure 14. power dissipation vs. average ouput power (audio program simulation, 4 w ) figure 15. power dissipation vs. average ouput power (audio program simulation, 2 w ) 012345 po ( w ) 0 5 10 15 20 25 30 35 40 45 ptot (w) vs = 14 v rl = 4 x 4 ohm gaussian noise std mode hi-eff mode clip start 0123456789 po ( w ) 0 10 20 30 40 50 60 70 80 90 ptot (w) vs = 14 v rl = 4 x 2 ohm gaussian noise std mode hi-eff mode clip start diagnostics functional description: a) turn-on diagnostic it is activated at the turn-on (stand-by out) under i 2 cbus request. detectable output faults are: C short to gnd C short to vs C short across the speaker C open speaker to verify if any of the above misconnections are in place, a subsonic (inaudible) current pulse (fig. 16) is inter- nally generated, sent through the speaker(s) and sunk back.the turn on diagnostic status is internally stored until a successive diagnostic pulse is requested (after a i2c reading). if the "stand-by out" and "diag. enable" commands are both given through a single programming step, the pulse takes place first (power stage still in stand-by mode, low, outputs= high impedance). afterwards, when the amplifier is biased, the permanent diagnostic takes place. the previous turn on state is kept until a short appears at the outputs. figure 16. turn - on diagnostic: working principle ch- ch+ isource vs~5v isink t (ms) i (ma) isink isource ~100ms measure time
9/20 TDA7564 fig. 17 and 18 show svr and output waveforms at the turn-on (stand-by out) with and without turn-on diagnostic. figure 17. svr and output behaviour (case 1: without turn-on diagnostic) figure 18. svr and output pin behaviour (case 2: with turn-on diagnostic) bias (power amp turn-on) t diagnostic enable (permanent) permanent diagnostic acquisition time (100ms typ) permanent diagnostics data (output) permitted time i2cb data vsvr out fault event read data bias (power amp turn-on) permitted time turn-on diagnostic acquisition time (100ms typ) t read data permanent diagnostic acquisition time (100ms typ) permanent diagnostics data (output) permitted time diagnostic enable (turn-on) turn-on diagnostics data (output) permitted time i2cb data vsvr out diagnostic enable (permanent) fault event
TDA7564 10/20 the information related to the outputs status is read and memorized at the end of the current pulse top. the acquisition time is 100 ms (typ.). no audible noise is generated in the process. as for short to gnd / vs the fault-detection thresholds remain unchanged from 26 db to 12 db gain setting. they are as follows: concerning short across the speaker / open speaker, the threshold varies from 26 db to 12 db gain setting, since different loads are expected (either normal speaker's impedance or high impedance). the values in case of 26 db gain are as follows: if the line-driver mode (gv= 12 db and line driver mode diagnostic = 1) is selected, the same thresholds will change as follows: b) permanent diagnostics. detectable conventional faults are: C short to gnd C short to vs C short across the speaker the following additional features are provided: C output offset detection the TDA7564 has 2 operating statuses: 1 restart mode. the diagnostic is not enabled. each audio channel operates independently from each other. if any of the a.m. faults occurs, only the channel(s) interested is shut down. a check of the output status is made every 1 ms (fig. 19). restart takes place when the overload is removed. 2 diagnostic mode. it is enabled via i 2 c bus and self activates if an output overload (such to cause the intervention of the short-circuit protection) occurs to the speakers outputs. once activated, the di- agnostics procedure develops as follows (fig. 20): C to avoid momentary re-circulation spikes from giving erroneous diagnostics, a check of the output sta- tus is made after 1ms: if normal situation (no overloads) is detected, the diagnostic is not performed and the channel returns back active. C instead, if an overload is detected during the check after 1 ms, then a diagnostic cycle having a duration of about 100 ms is started. d01au1253 s.c. to gnd x s.c. to vs 0v 1.8v v s -1.8v v s x normal operation 1.2v v s -1.2v s.c. across load x open load 0v 1.75 w 45 w infinite x normal operation 0.5 w 85 w d01au1327 d02au1340 s.c. across load x open load 0 w 7 w 180 w infinite x normal operation 2 w 330 w
11/20 TDA7564 C after a diagnostic cycle, the audio channel interested by the fault is switched to restart mode. the relevant data are stored inside the device and can be read by the microprocessor. when one cycle has terminated, the next one is activated by an i 2 c reading. this is to ensure continuous diagnostics throughout the car-radio operating time. C to check the status of the device a sampling system is needed. the timing is chosen at microprocessor level (over half a second is recommended). figure 19. restart timing without diagnostic enable (permanent) - each 1ms time, a sampling of the fault is done figure 20. restart timing with diagnostic enable (permanent) output dc offset detection any dc output offset exceeding 2v are signalled out. this inconvenient might occur as a consequence of ini- tially defective or aged and worn-out input capacitors feeding a dc component to the inputs, so putting the speakers at risk of overheating. this diagnostic has to be performed with low-level output ac signal (or vin = 0). the test is run with selectable time duration by microprocessor (from a "start" to a "stop" command): C start = last reading operation or setting ib1 - d5 - (offset enable) to 1 C stop = actual reading operation excess offset is signalled out if persistent throughout the assigned testing time. this feature is disabled if any overloads leading to activation of the short-circuit protection occurs in the process. ac diagnostic. it is targeted at detecting accidental disconnection of tweeters in 2-way speaker and, more in general, presence of capacitively (ac) coupled loads. this diagnostic is based on the notion that the overall speaker's impedance (woofer + parallel tweeter) will tend to increase towards high frequencies if the tweeter gets disconnected, because the remaining speaker (woofer) would be out of its operating range (high impedance). the diagnostic decision is made according to peak output t 1-2ms 1ms 1ms 1ms 1ms overcurrent and short circuit protection intervention (i.e. short circuit to gnd) short circuit removed out t overcurrent and short circuit protection intervention (i.e. short circuit to gnd) short circuit removed 1-2ms 100/200ms 1ms 1ms
TDA7564 12/20 current thresholds, as follows: iout > 500mapk = normal status iout < 250mapk = open tweeter to correctly implement this feature, it is necessary to briefly provide a signal tone (with the amplifier in "play") whose frequency and magnitude are such to determine an output current higher than 500mapk in normal con- ditions and lower than 250mapk should the parallel tweeter be missing. the test has to last for a minimum num- ber of 3 sine cycles starting from the activation of the ac diagnostic function ib2) up to the i2c reading of the results (measuring period). to confirm presence of tweeter, it is necessary to find at least 3 current pulses over 500ma over all the measuring period, else an "open tweeter" message will be issued. the frequency / magnitude setting of the test tone depends on the impedance characteristics of each specific speaker being used, with or without the tweeter connected (to be calculated case by case). high-frequency tones (> 10 khz) or even ultrasonic signals are recommended for their negligible acoustic impact and also to maximize the impedance module's ratio between with tweeter-on and tweeter-off. fig. 21 shows the load impedance as a function of the peak output voltage and the relevant diagnostic fields. this feature is disabled if any overloads leading to activation of the short-circuit protection occurs in the process. figure 21. current detection: load impedance magnitude |z| vs. output peak voltage of the sinus multiple faults when more misconnections are simultaneously in place at the audio outputs, it is guaranteed that at least one of them is initially read out. the others are notified after successive cycles of i 2 c reading and faults removal, provided that the diagnostic is enabled. this is true for both kinds of diagnostic (turn on and permanent). the table below shows all the couples of double-fault possible. it should be taken into account that a short circuit with the 4 ohm speaker unconnected is considered as double fault. double fault table for turn on diagnostic s. gnd (so) s. gnd (sk) s. vs s. across l. open l. s. gnd (so) s. gnd s. gnd s. vs + s. gnd s. gnd s. gnd s. gnd (sk) / s. gnd s. vs s. gnd open l. (*) s. vs / / s. vs s. vs s. vs s. across l. / / / s. across l. n.a. open l. / / / / open l. (*) 12345678 1 2 3 5 10 20 30 50 vout (peak) load |z| (ohm) iout (peak) <250ma iout (peak) >500ma low current detection area (open load) d5 = 1 of the dbx byres high current detection area (normal load) d5 = 0 of the dbx bytes
13/20 TDA7564 s. gnd (so) / s. gnd (sk) in the above table make a distinction according to which of the 2 outputs is shorted to ground (test-current source side= so, test-current sink side = sk). more precisely, in channels lf and rr, so = ch+, sk = ch-; in channels lr and rf, so = ch-, sk = ch+ . in permanent diagnostic the table is the same, with only a difference concerning open load(*) , which is not among the recognisable faults. should an open load be present during the device's normal working, it would be detected at a subsequent turn on diagnostic cycle (i.e. at the successive car radio turn on). faults availability all the results coming from i 2 c bus, by read operations, are the consequence of measurements inside a defined period of time. if the fault is stable throughout the whole period, it will be sent out. this is true for dc diagnostic (turn on and permanent), for offset detector, for ac diagnostic (the low current sensor needs to be stable to confirm the open tweeter). to guarantee always resident functions, every kind of diagnostic cycles (turn on, permanent, offset, ac) will be reactivate after any i 2 c reading operation. so, when the micro reads the i 2 c, a new cycle will be able to start, but the read data will come from the previous diag. cycle (i.e. the device is in turn on state, with a short to gnd, then the short is removed and micro reads i 2 c. the short to gnd is still present in bytes, because it is the result of the previous cycle. if another i 2 c reading operation occurs, the bytes do not show the short). in general to observe a change in diagnostic bytes, two i 2 c reading operations are necessary. i 2 c programming/reading sequences a correct turn on/off sequence respectful of the diagnostic timings and producing no audible noises could be as follows (after battery connection): turn-on: (stand-by out + diag enable) --- 500 ms (min) --- muting out turn-off: muting in --- 20 ms --- (diag disable + stand-by in) car radio installation: diag enable (write) --- 200 ms --- i 2 c read (repeat until all faults disappear). ac test: feed h.f. tone -- ac diag enable (write) --- wait > 3 cycles --- i 2 c read (repeat i 2 c reading until tweeter-off message disappears). offset test: device in play (no signal) -- offset enable - 30ms - i 2 c reading (repeat i 2 c reading until high-offset message disappears).
TDA7564 14/20 i 2 c bus interface data transmission from microprocessor to the TDA7564 and viceversa takes place through the 2 wires i 2 c bus inter- face, consisting of the two lines sda and scl (pull-up resistors to positive supply voltage must be connected). data validity as shown by fig. 22, the data on the sda line must be stable during the high period of the clock. the high and low state of the data line can only change when the clock signal on the scl line is low. start and stop conditions as shown by fig. 23 a start condition is a high to low transition of the sda line while scl is high. the stop condition is a low to high transition of the sda line while scl is high. byte format every byte transferred to the sda line must contain 8 bits. each byte must be followed by an acknowledge bit. the msb is transferred first. acknowledge the transmitter* puts a resistive high level on the sda line during the acknowledge clock pulse (see fig. 24). the receiver** the acknowledges has to pull-down (low) the sda line during the acknowledge clock pulse, so that the sdaline is stable low during this clock pulse. * transmitter = master ( m p) when it writes an address to the TDA7564 = slave (TDA7564) when the m p reads a data byte from TDA7564 ** receiver = slave (TDA7564) when the m p writes an address to the TDA7564 = master ( m p) when it reads a data byte from TDA7564 figure 22. data validity on the i 2 cbus figure 23. timing diagram on the i 2 cbus figure 24. acknowledge on the i 2 cbus sda scl data line stable, data valid change data allowed d99au1031 scl sda start i 2 cbus stop d99au1032 scl 1 msb 23789 sda start acknowledgment from receiver d99au1033
15/20 TDA7564 software specifications all the functions of the TDA7564 are activated by i 2 c interface. the bit 0 of the "address byte" defines if the next bytes are write instruction (from m p to TDA7564) or read instruction (from TDA7564 to m p). chip address: x = 0 write to device x = 1 read from device if r/w = 0, the m p sends 2 "instruction bytes": ib1 and ib2. ib1 ib2 d7 d0 1101100xd8 hex d7 x d6 diagnostic enable (d6 = 1) diagnostic defeat (d6 = 0) d5 offset detection enable (d5 = 1) offset detection defeat (d5 = 0) d4 front channel gain = 26db (d4 = 0) gain = 12db (d4 = 1) d3 rear channel gain = 26db (d3 = 0) gain = 12db (d3 = 1) d2 mute front channels (d2 = 0) unmute front channels (d2 = 1) d1 mute rear channels (d1 = 0) unmute rear channels (d1 = 1) d0 clip detector 2% (d0 = 0) clip detector 10% (d0 = 1) d7 x d6 used for testing d5 used for testing d4 stand-by on - amplifier not working - (d4 = 0) stand-by off - amplifier working - (d4 = 1) d3 power amplifier mode diagnostic (d3 = 0) line driver mode diagnostic (d3 = 1) d2 current detection diagnostic enabled (d2 = 1) current detection diagnostic defeat (d2 = 0) d1 right channels power amplifier working in standard mode (d1 = 0) power amplifier working in high efficiency mode (d1 = 1) d0 left channels power amplifier working in standard mode (d0 = 0) power amplifier working in high efficiency mode (d0 = 1)
TDA7564 16/20 if r/w = 1, the TDA7564 sends 4 "diagnostics bytes" to m p: db1, db2, db3 and db4. db1 db2 d7 thermal warning active (d7 = 1) d6 diag. cycle not activated or not terminated (d6 = 0) diag. cycle terminated (d6 = 1) d5 channel lf current detection output peak current < 250ma - open load (d5 = 1) output peak current > 500ma - open load (d5 = 0) d4 channel lf turn-on diagnostic (d4 = 0) permanent diagnostic (d4 = 1) d3 channel lf normal load (d3 = 0) short load (d3 = 1) d2 channel lf turn-on diag.: no open load (d2 = 0) open load detection (d2 = 1) offset diag.: no output offset (d2 = 0) output offset detection (d2 = 1) d1 channel lf no short to vcc (d1 = 0) short to vcc (d1 = 1) d0 channel lf no short to gnd (d1 = 0) short to gnd (d1 = 1) d7 offset detection not activated (d7 = 0) offset detection activated (d7 = 1) d6 current sensor not activated (d6 = 0) current sensor activated (d6 = 1) d5 channel lr current detection output peak current < 250ma - open load (d5 = 1) output peak current > 500ma - open load (d5 = 0) d4 channel lr turn-on diagnostic (d4 = 0) permanent diagnostic (d4 = 1) d3 channel lr normal load (d3 = 0) short load (d3 = 1) d2 channel lr turn-on diag.: no open load (d2 = 0) open load detection (d2 = 1) permanent diag.: no output offset (d2 = 0) output offset detection (d2 = 1) d1 channel lr no short to vcc (d1 = 0) short to vcc (d1 = 1) d0 channel lr no short to gnd (d1 = 0) short to gnd (d1 = 1)
17/20 TDA7564 db3 db4 d7 stand-by status (= ib1 - d4) d6 diagnostic status (= ib1 - d6) d5 channel rf current detection output peak current < 250ma - open load (d5 = 1) output peak current > 500ma - open load (d5 = 0) d4 channel rf turn-on diagnostic (d4 = 0) permanent diagnostic (d4 = 1) d3 channel rf normal load (d3 = 0) short load (d3 = 1) d2 channel rf turn-on diag.: no open load (d2 = 0) open load detection (d2 = 1) permanent diag.: no output offset (d2 = 0) output offset detection (d2 = 1) d1 channel rf no short to vcc (d1 = 0) short to vcc (d1 = 1) d0 channel rf no short to gnd (d1 = 0) short to gnd (d1 = 1) d7 x d6 x d5 channel rr current detection output peak current < 250ma - open load (d5 = 1) output peak current > 500ma - open load (d5 = 0) d4 channel rr turn-on diagnostic (d4 = 0) permanent diagnostic (d4 = 1) d3 channel rr normal load (d3 = 0) short load (d3 = 1) d2 channel rr turn-on diag.: no open load (d2 = 0) open load detection (d2 = 1) permanent diag.: no output offset (d2 = 0) output offset detection (d2 = 1) d1 channel rr no short to vcc (d1 = 0) short to vcc (d1 = 1) d0 channel rr no short to gnd (d1 = 0) short to gnd (d1 = 1)
TDA7564 18/20 examples of bytes sequence 1 - turn-on diagnostic - write operation 2 - turn-on diagnostic - read operation the delay from 1 to 2 can be selected by software, starting from t.b.d. ms 3a - turn-on of the power amplifier with 26db gain, mute on, diagnostic defeat, high eff. mode both channels.. 3b - turn-off of the power amplifier 4 - offset detection procedure enable 5 - offset detection procedure stop and reading operation (the results are valid only for the offset detection bits (d2 of the bytes db1, db2, db3, db4). n the purpose of this test is to check if a d.c. offset (2v typ.) is present on the outputs, produced by input capacitor with anomalous leakage current or humidity between pins. n the delay from 4 to 5 can be selected by software, starting from t.b.d. ms 6 - current detection procedure start (the ac inputs must be with a proper signal that depends on the type of load) 7 - current detection reading operation (the results valid only for the current sensor detection bits - d5 of the bytes db1, db2, db3, db4). n during the test, a sinus wave with a proper amplitude and frequency (depending on the loudspeaker under test) must be present. the minimum number of periods that are needed to detect a normal load is 5. n the delay from 6 to 7 can be selected by software, starting from t.b.d. ms. start address byte with d0 = 0 ack ib1 with d6 = 1 ack ib2 ack stop start address byte with d0 = 1 ack db1 ack db2 ack db3 ack db4 ack stop start address byte with d0 = 0 ack ib1 ack ib2 ack stop x000000x xxx1x011 start address byte with d0 = 0 ack ib1 ack ib2 ack stop x0xxxxxx xxx0xxxx start address byte with d0 = 0 ack ib1 ack ib2 ack stop xx1xx11x xxx1x0xx start address byte with d0 = 1 ack db1 ack db2 ack db3 ack db4 ack stop start address byte with d0 = 0 ack ib1 ack ib2 ack stop xx01111x xxx1x1xx start address byte with d0 = 1 ack db1 ack db2 ack db3 ack db4 ack stop
19/20 TDA7564 outline and mechanical data dim. mm inch min. typ. max. min. typ. max. a 4.45 4.50 4.65 0.175 0.177 0.183 b 1.80 1.90 2.00 0.070 0.074 0.079 c 1.40 0.055 d 0.75 0.90 1.05 0.029 0.035 0.041 e 0.37 0.39 0.42 0.014 0.015 0.016 f (1) 0.57 0.022 g 0.80 1.00 1.20 0.031 0.040 0.047 g1 23.75 24.00 24.25 0.935 0.945 0.955 h (2) 28.90 29.23 29.30 1.139 1.150 1.153 h1 17.00 0.669 h2 12.80 0.503 h3 0.80 0.031 l (2) 22.07 22.47 22.87 0.869 0.884 0.904 l1 18.57 18.97 19.37 0.731 0.747 0.762 l2 (2) 15.50 15.70 15.90 0.610 0.618 0.626 l3 7.70 7.85 7.95 0.303 0.309 0.313 l4 5 0.197 l5 3.5 0.138 m 3.70 4.00 4.30 0.145 0.157 0.169 m1 3.60 4.00 4.40 0.142 0.157 0.173 n 2.20 0.086 o 2 0.079 r 1.70 0.067 r1 0.5 0.02 r2 0.3 0.12 r3 1.25 0.049 r4 0.50 0.019 v1 3? (typ.) v5? (tp.) v2 20? (typ.) v3 45? (typ.) (2): molding protusion included (1): dam-bar protusion not included flexiwatt25 (vertical) h3 r4 g v g1 l2 h1 h f m1 l flex25me v3 o l3 l4 h2 r3 n v2 r r2 r2 c b l1 m r1 l5 r1 r1 e d a pin 1 v v1 v1 7034862
information furnished is believed to be accurate and reliable. however, stmicroelectronics assumes no responsibility for the co nsequences 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. specifications mentioned in this publicati on are subject to change without notice. this publication supersedes and replaces all information previously supplied. stmicroelectronics prod ucts are not authorized for use as critical components in life support devices or systems without express written approval of stmicroelectro nics. the st logo is a registered trademark of stmicroelectronics. all other names are the property of their respective owners ? 2003 stmicroelectronics - all rights reserved stmicroelectronics group of companies australia - belgium - brazil - canada - china - czech republic - finland - france - germany - hong kong - india - israel - ital y - japan - malaysia - malta - morocco - singapore - spain - sweden - switzerland - united kingdom - united states www.st.com 20/20 TDA7564

▲Up To Search▲

Price & Availability of TDA7564

	To Download TDA7564 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .