 |
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
| Datasheet File OCR Text: |
| TDA7566 MULTIFUNCTION QUAD POWER AMPLIFIER WITH BUILT-IN DIAGNOSTICS FEATURES s s s s s s s s s DMOS POWER OUTPUT HIGH OUTPUT POWER CAPABILITY 4x25W/ 4 @ 14.4V, 1KHZ, 10% THD, 4x35W EIAJ MAX. OUTPUT POWER 4x60W/2W FULL I2C BUS DRIVING:- ST-BYINDEPENDENT FRONT/REAR SOFT PLAY/ MUTE- SELECTABLE GAIN 26dB - 12dB- I2C BUS DIGITAL DIAGNOSTICS FULL FAULT PROTECTION DC OFFSET DETECTION FOUR INDEPENDENT SHORT CIRCUIT PROTECTION CLIPPING DETECTOR (1%/10%) ESD PROTECTION MULTIPOWER BCD TECHNOLOGY MOSFET OUTPUT POWER STAGE FLEXIWATT25 ORDERING NUMBER: TDA7566 a very low distortion allowing a clear powerful sound. This device is equipped with a full diagnostics array that communicates the status of each speaker through the I2C bus. The possibility to control the configuration and behaviour of the device by means of the I2C bus makes TDA7566 a very flexible machine. DESCRIPTION The TDA7566 is a new BCD technology QUAD BRIDGE type of car radio amplifier in Flexiwatt25 package specially intended for car radio applications. Thanks to the DMOS output stage the TDA7566 has BLOCK DIAGRAM CLK DATA VCC1 VCC2 CD_OUT REFERENCE THERMAL PROTECTION & DUMP I2C BUS MUTE1 MUTE2 CLIP DETECTOR IN RF F OUT RF+ 12/26dB OUT RFR SHORT CIRCUIT PROTECTION & DIAGNOSTIC OUT RR+ 12/26dB OUT RRF SHORT CIRCUIT PROTECTION & DIAGNOSTIC OUT LF+ 12/26dB OUT LFR SHORT CIRCUIT PROTECTION & DIAGNOSTIC OUT LR+ 12/26dB OUT LRSHORT CIRCUIT PROTECTION & DIAGNOSTIC SVR D00AU1229 IN RR IN LF IN LR AC_GND RF RR LF LR TAB PW_GND S_GND September 2003 1/19 TDA7566 ABSOLUTE MAXIMUM RATINGS Symbol Vop VS Vpeak VCK VDATA IO IO Ptot Tstg, Tj Operating Supply Voltage DC Supply Voltage Peak Supply Voltage (for t = 50ms) CK pin Voltage Data Pin Voltage Output Peak Current (not repetitive t = 100s) Output Peak Current (repetitive f > 10Hz) Power Dissipation Tcase = 70C Storage and Junction Temperature Parameter Value 18 28 50 6 6 8 6 85 -55 to 150 Unit V V V V V A A W C THERMAL DATA Symbol Rth j-case Description Thermal Resistance Junction-case Max. Value 1 Unit C/W PIN CONNECTION (top view) 25 24 23 22 DATA PW_GND RR OUT RRCK OUT RR+ 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 VCC2 OUT RFPW_GND RF OUT RF+ AC GND IN RF IN RR S GND IN LR IN LF SVR OUT LF+ PW_GND LF OUT LFVCC1 OUT LR+ 4 3 2 1 CD-OUT OUT LRPW_GND LR TAB D99AU1037 2/19 TDA7566 Figure 1. Test and Application Circuit C8 0.1F C7 3300F Vcc1 6 Vcc2 20 17 18 19 + OUT RR + OUT LF + OUT LR TAB + OUT RF DATA I2C BUS CLK C1 0.22F IN RF C2 0.22F IN RR C3 0.22F IN LF C4 0.22F IN LR S-GND 25 22 21 24 23 9 8 7 15 14 11 5 2 12 3 13 16 10 4 1 47K C5 1F C6 10F CD OUT V D00AU1212 3/19 TDA7566 ELECTRICAL CHARACTERISTICS (Refer to the test circuit, VS = 14.4V; RL = 4; f = 1KHz; GV = 26dB; Tamb = 25C; unless otherwise specified.) Symbol Parameter POWER AMPLIFIER Supply Voltage Range VS Id Total Quiescent Drain Current Output Power PO Test Condition Min. 8 EIAJ (VS = 13.7V) THD = 10% THD = 1% RL = 2; EIAJ (VS = 13.7V) RL = 2; THD 10% RL = 2; THD 1% RL = 2; MAX POWER PO = 1W to 10W; GV = 12dB; VO = 0.1 to 5VRMS CT RIN GV1 GV1 GV2 EIN1 EIN2 SVR BW ASB ISB AM VOS VAM TON TOFF CDLK CDSAT CDTHD Cross Talk Input Impedance Voltage Gain 1 Voltage Gain Match 1 Voltage Gain 2 Output Noise Voltage 1 Output Noise Voltage 2 Supply Voltage Rejection Power Bandwidth Stand-by Attenuation Stand-by Current Mute Attenuation Offset Voltage Min. Supply Voltage Threshold Turn on Delay Turn off Delay Clip Det High Leakage Current Clip Det Sat. Voltage Clip Det THD level Mute & Play D2/D1 (IB1) 0 to 1 D2/D1 (IB1) 1 to 0 CD off 0 5 Rg = 600; 20Hz to 22kHz Rg = 600; GV = 12dB; 20Hz to 22kHz f = 100Hz to 10kHz; Vr = 1Vpk; Rg = 600 f = 1KHz to 10KHz, RG = 600W 50 60 25 -1 32 22 16 50 32 25 55 150 35 25 20 55 38 30 60 0.04 0.02 60 100 26 0 12 35 12 50 100 90 80 -100 7 60 130 27 1 100 0.1 0.05 Typ. Max. 18 300 Unit V mA W W W W W W W % % dB K dB dB dB V V dB KHz dB A dB mV V ms ms A mV % % V THD Total Harmonic Distortion 110 25 100 0 7.5 20 20 0 1 10 100 100 8 50 50 15 300 2 15 1.2 CD on; ICD = 1mA D0 (IB1) = 0 D0 (IB1) = 1 TURN ON DIAGNOSTICS 1 (Power Amplifier Mode) Pgnd Short to GND det. (below this Power Amplifier in st-by limit, the Output is considered in Short Circuit to GND) Pvs Short to Vs det. (above this limit, the Output isconsidered in Short Circuit to VS) Pnop Normal operation thresholds.(Within these limits, the Output is considered without faults). Lsc Shorted Load det. Lop Open Load det. Lnop Normal Load det. Vs -1.2 V 1.8 Vs -1.8 V 0.5 85 1.65 45 4/19 TDA7566 ELECTRICAL CHARACTERISTICS (continued) (Refer to the test circuit, VS = 14.4V; RL = 4; f = 1KHz; GV = 26dB; Tamb = 25C; unless otherwise specified.) Symbol Parameter Test Condition TURN ON DIAGNOSTICS 2 (Line Driver Mode) Pgnd Short to GND det. (below this Power Amplifier in st-by limit, the Output is considered in Short Circuit to GND) Pvs Short to Vs det. (above this limit, the Output isconsidered in Short Circuit to VS) Pnop Normal operation thresholds. (Within these limits, the Output is considered without faults). Lsc Shorted Load det. Lop Open Load det. Lnop Normal Load det. PERMANENT DIAGNOSTICS 2 (Power Amplifier Mode or Line Driver Mode) Pgnd Short to GND det. (below this Power Amplifier in Mute or Play, limit, the Output is considered in one or more short circuits Short Circuit to GND) protection activated Pvs Short to Vs det. (above this limit, the Output is considered in Short Circuit to VS) Pnop Normal operation thresholds.(Within these limits, the Output is considered without faults). Shorter Load det. Power Amplifier mode LSC Line Driver mode Offset Detection Power Amplifier in play, AC Input VO signals = 0 INL Normal load current detection VO < (VS - 5)pk IOL Open load current detection I C BUS INTERFACE Clock Frequency fSCL VIL Input Low Voltage VIH Input High Voltage 2 Min. Typ. Max. 1.2 Unit V Vs -1.2 V 1.8 Vs -1.8 V 2 330 7 180 1.2 V Vs -1.2 V 1.8 Vs -1.8 V 1.5 2 0.5 2 2.5 500 V mA mA 250 400 1.5 2.3 KHz V V 5/19 TDA7566 Figure 2. Quiescent Current vs. Supply Voltage Id (mA) 250 230 210 190 170 150 130 Vin = 0 NO LOADS Figure 5. Distortion vs. Output Power (4) THD (%) 10 Vs = 14.4 V RL = 4 Ohm 1 f = 10 KHz 0.1 f = 1 KHz 110 90 70 50 8 10 12 Vs (V) 14 16 18 0.01 0.1 1 Po (W) 10 Figure 3. Output Power vs. Supply Voltage (4) Po (W) 70 65 60 55 50 45 40 35 30 25 20 15 10 5 8 9 10 11 12 13 Vs (V) 14 15 16 17 18 THD= 1 % RL = 4 Ohm f = 1 KHz THD= 10 % Po-max Figure 6. Distortion vs. Output Power (2) THD (%) 10 Vs = 14.4 V RL = 2 Ohm 1 f = 10 KHz 0.1 f = 1 KHz 0.01 0.1 1 Po (W) 10 Figure 4. Output Power vs. Supply Voltage (2) Po (W) 80 75 70 65 60 55 50 45 40 35 30 25 20 15 10 5 8 Figure 7. Distortion vs. Frequency (4) THD (%) 10 Po-max RL = 2 Ohm f = 1 KHz THD= 10 % Vs = 14.4 V RL = 4 Ohm Po = 4 W 1 0.1 THD= 1 % 9 10 11 12 Vs (V) 13 14 15 16 0.01 10 100 f (Hz) 1000 10000 6/19 TDA7566 Figure 8. Distortion vs. Frequency (2W) THD (%) 10 Vs = 14.4 V RL = 2 Ohm Po = 8 W 1 90 80 70 60 50 Ptot 40 40 30 20 10 0 26 Vs = 14.4 V RL = 4x4 Ohm f= 1 KHz SINE n Figure 11. Power Dissipation & Efficiency vs. Output Power (4, SINE) Ptot (W) n (%) 90 80 70 60 50 0.1 30 20 10 0.01 10 100 f (Hz) 1000 10000 0 0 2 4 6 8 10 12 14 Po (W) 16 18 20 22 24 Figure 9. Crosstalk vs. Frequency Figure 12. Power Dissipation vs. Average Ouput Power (Audio Program Simulation, 4) Ptot (W) 45 40 CROSSTALK (dB) 90 80 35 70 30 Vs = 14.4 V RL = 4x4 Ohm GAUSSIAN NOISE CLIP START 60 50 40 30 20 10 Vs = 14.4 V RL = 4 Ohm Po = 4 W Rg = 600 Ohm 25 20 15 10 5 100 f (Hz) 1000 10000 0 1 2 Po (W) 3 4 5 Figure 10. Supply Voltage Rejection vs. Freq. SVR (dB) 90 80 70 Figure 13. Power Dissipation vs. Average Ouput Power (Audio Program Simulation, 2) Ptot (W) 90 80 70 60 Vs = 14.4 V RL = 4x2 Ohm GAUSSIAN NOISE CLIP START 60 50 40 30 20 10 Rg = 600 Ohm Vripple = 1 Vpk 50 40 30 20 10 0 100 f (Hz) 1000 10000 0 1 2 3 4 Po (W) 5 6 7 8 7/19 TDA7566 DIAGNOSTICS FUNCTIONAL DESCRIPTION: a) TURN-ON DIAGNOSTIC. It is activated at the turn-on (stand-by out) under I2Cbus request. Detectable output faults are: - SHORT TO GND - SHORT TO Vs - SHORT ACROSS THE SPEAKER - OPEN SPEAKER To verify if any of the above misconnections are in place, a subsonic (inaudible) current pulse (fig. 14) is internally 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 14. Turn - On diagnostic: working principle Vs~5V Isource I (mA) Isource Isink CH+ CH- Isink ~100ms Measure time t (ms) Fig. 15 and 16 show SVR and OUTPUT waveforms at the turn-on (stand-by out) with and without TURN-ON DIAGNOSTIC. Figure 15. SVR and Output behaviour (CASE 1: without turn-on diagnostic) Vsvr Out Permanent diagnostic acquisition time (100mS Typ) Bias (power amp turn-on) Diagnostic Enable (Permanent) t FAULT event Permanent Diagnostics data (output) permitted time Read Data I2CB DATA 8/19 TDA7566 Figure 16. SVR and Output pin behaviour (CASE 2: with turn-on diagnostic) Vsvr Out Turn-on diagnostic acquisition time (100mS Typ) Permanent diagnostic acquisition time (100mS Typ) t Diagnostic Enable (Turn-on) Turn-on Diagnostics data (output) permitted time Diagnostic Enable (Permanent) FAULT event Bias (power amp turn-on) permitted time Read Data Permanent Diagnostics data (output) permitted time I2CB DATA 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: S.C. to GND x Normal Operation x S.C. to Vs 0V 1.2V 1.8V VS-1.8V VS-1.2V D01AU1253 VS 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: S.C. across Load x Normal Operation x Open Load 0V 0.5 1.5 70 130 D01AU1254 Infinite If the Line-Driver mode (Gv= 12 dB and Line Driver Mode diagnostic = 1) is selected, the same thresholds will change as follows: S.C. across Load x Normal Operation x Open Load 0 1.5 4.5 200 400 D01AU1252 infinite 9/19 TDA7566 b) PERMANENT DIAGNOSTICS. Detectable conventional faults are: - SHORT TO GND - SHORT TO Vs - SHORT ACROSS THE SPEAKER The following additional features are provided: - OUTPUT OFFSET DETECTION - AC DIAGNOSTIC The TDA7566 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. 17). Restart takes place when the overload is removed. 2 DIAGNOSTIC mode. It is enabled via I2C 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 diagnostics procedure develops as follows (fig. 18): - To avoid momentary re-circulation spikes from giving erroneous diagnostics, a check of the output status is made after 1ms: if normal situation (no overloads) is detected, the diagnostic is not performed and the channel returns back active. - 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. - 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 I2C reading. This is to ensure continuous diagnostics throughout the car-radio operating time. - 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 17. Restart timing without Diagnostic Enable (Permanent) Each 1ms time, a sampling of the fault is done Out 1-2mS 1mS 1mS 1mS 1mS t Overcurrent and short circuit protection intervention (i.e. short circuit to GND) Short circuit removed Figure 18. Restart timing with Diagnostic Enable (Permanent) 1mS 100mS 1mS 1mS t Overcurrent and short Short circuit removed (i.e. short circuit to GND) 10/19 TDA7566 OUTPUT DC OFFSET DETECTION. Any DC output offset exceeding 2V are signalled out. This inconvenient might occur as a consequence of initially 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): START = Last reading operation or setting IB1 - D5 - (OFFSET enable) to 1 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 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 conditions and lower than 250mApk should the parallel tweeter be missing. The test has to last for a minimum number of 3 sine cycles starting from the activation of the AC diagnostic function IB2 Load |z| (Ohm) 50 Iout (peak) <250mA 30 20 Low current detection area (Open load) D5 = 1 of the DBx byres Iout (peak) >500mA 10 5 3 2 High current detection area (Normal load) D5 = 0 of the DBx bytes 1 1 2 3 4 5 6 7 8 Vout (Peak) 11/19 TDA7566 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 I2C 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 (so) S. GND (sk) S. Vs S. Across L. Open L. S. GND / / / / S. GND (sk) S. GND S. GND / / / S. Vs S. Vs + S. GND S. Vs S. Vs / / S. Across L. S. GND S. GND S. Vs S. Across L. / Open L. S. GND Open L. (*) S. Vs N.A. Open L. (*) 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 LR, 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 I2Cbus, 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 I2C reading operation. So, when the micro reads the I2C, 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 I2C. The short to Gnd is still present in bytes, because it is the result of the previous cycle. If another I2C reading operation occurs, the bytes do not show the short). In general to observe a change in Diagnostic bytes, two I2C reading operations are necessary. I2C PROGRAMMING/READING SEQUENCE 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 --- I2C read (repeat until All faults disappear). AC TEST: FEED H.F. TONE -- AC DIAG ENABLE (write) --- WAIT > 3 CYCLES --- I2C read (repeat I2C reading until tweeter-off message disappears). OFFSET TEST: Device in Play (no signal) -- OFFSET ENABLE - 30ms - I2C reading (repeat I2C reading until high-offset message disappears). 12/19 TDA7566 I2C BUS INTERFACE Data transmission from microprocessor to the TDA7566 and viceversa takes place through the 2 wires I2C BUS interface, consisting of the two lines SDA and SCL (pull-up resistors to positive supply voltage must be connected). Data Validity As shown by fig. 20, 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. 21 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. 22). 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 (P) when it writes an address to the TDA7566 slave (TDA7566) when the P reads a data byte from TDA7566 ** Receiver slave (TDA7566) when the P writes an address to the TDA7566 master (P) when it reads a data byte from TDA7566 Figure 20. Data Validity on the I2C BUS SDA SCL DATA LINE STABLE, DATA VALID CHANGE DATA ALLOWED D99AU1031 Figure 21. SCL I2CBUS SDA D99AU1032 START STOP Figure 22. SCL 1 2 3 7 8 9 SDA MSB START D99AU1033 ACKNOWLEDGMENT FROM RECEIVER 13/19 TDA7566 SOFTWARE SPECIFICATIONS All the functions of the TDA7566 are activated by I2C interface. The bit 0 of the "ADDRESS BYTE" defines if the next bytes are write instruction (from P to TDA7566) or read instruction (from TDA7566 to P). Chip Address: D7 1 1 0 1 1 0 0 D0 X D8 Hex X = 0 Write to device X = 1 Read from device If R/W = 0, the P sends 2 "Instruction Bytes": IB1 and IB2. IB1 D7 D6 D5 D4 X Diagnostic enable (D6 = 1) Diagnostic defeat (D6 = 0) Offset Detection enable (D5 = 1) Offset Detection defeat (D5 = 0) Front Channel Gain = 26dB (D4 = 0) Gain = 12dB (D4 = 1) Rear Channel Gain = 26dB (D3 = 0) Gain = 12dB (D3 = 1) Mute front channels (D2 = 0) Unmute front channels (D2 = 1) Mute rear channels (D1 = 0) Unmute rear channels (D1 = 1) CD 2% (D0 = 0) CD 10% (D0 = 1) D3 D2 D1 D0 IB2 D7 D6 D5 D4 D3 D2 D1 D0 X used for testing used for testing Stand-by on - Amplifier not working - (D4 = 0) Stand-by off - Amplifier working - (D4 = 1) Power amplifier mode diagnostic (D3 = 0) Line driver mode diagnostic (D3 = 1) Current detection diagnostic enabled (D2 = 1) Current detection diagnostic defeat (D2 = 0) X X 14/19 TDA7566 If R/W = 1, the TDA7566 sends 4 "Diagnostics Bytes" to mP: DB1, DB2, DB3 and DB4. DB1 D7 D6 D5 Thermal warning active (D7 = 1) Diag. cycle not activated or not terminated (D6 = 0) Diag. cycle terminated (D6 = 1) Channel LF current detection Output peak current < 250mA - Open load (D5 = 1) Output peak current > 500mA - Open load (D5 = 0) Channel LF Turn-on diagnostic (D4 = 0) Permanent diagnostic (D4 = 1) Channel LF Normal load (D3 = 0) Short load (D3 = 1) 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) Channel LF No short to Vcc (D1 = 0) Short to Vcc (D1 = 1) Channel LF No short to GND (D1 = 0) Short to GND (D1 = 1) D4 D3 D2 D1 D0 DB2 D7 D6 D5 Offset detection not activated (D7 = 0) Offset detection activated (D7 = 1) Current sensor not activated (D6 = 0) Current sensor activated (D6 = 1) Channel LR current detection Output peak current < 250mA - Open load (D5 = 1) Output peak current > 500mA - Open load (D5 = 0) Channel LR Turn-on diagnostic (D4 = 0) Permanent diagnostic (D4 = 1) Channel LR Normal load (D3 = 0) Short load (D3 = 1) 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) Channel LR No short to Vcc (D1 = 0) Short to Vcc (D1 = 1) Channel LR No short to GND (D1 = 0) Short to GND (D1 = 1) D4 D3 D2 D1 D0 15/19 TDA7566 DB3 D7 D6 D5 Stand-by status (= IB1 - D4) Diagnostic status (= IB1 - D6) Channel RF current detection Output peak current < 250mA - Open load (D5 = 1) Output peak current > 500mA - Open load (D5 = 0) Channel RF Turn-on diagnostic (D4 = 0) Permanent diagnostic (D4 = 1) Channel RF Normal load (D3 = 0) Short load (D3 = 1) 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) Channel RF No short to Vcc (D1 = 0) Short to Vcc (D1 = 1) Channel RF No short to GND (D1 = 0) Short to GND (D1 = 1) D4 D3 D2 D1 D0 DB4 D7 D6 D5 X X Channel R Rcurrent detection Output peak current < 250mA - Open load (D5 = 1) Output peak current > 500mA - Open load (D5 = 0) Channel RR Turn-on diagnostic (D4 = 0) Permanent diagnostic (D4 = 1) Channel RR Normal load (D3 = 0) Short load (D3 = 1) 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) Channel RR No short to Vcc (D1 = 0) Short to Vcc (D1 = 1) Channel RR No short to GND (D1 = 0) Short to GND (D1 = 1) D4 D3 D2 D1 D0 16/19 TDA7566 Examples of bytes sequence 1 - Turn-On diagnostic - Write operation Start Address byte with D0 = 0 ACK IB1 with D6 = 1 ACK IB2 ACK STOP 2 - Turn-On diagnostic - Read operation Start Address byte with D0 = 1 ACK DB1 ACK DB2 ACK DB3 ACK DB4 ACK STOP 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. Start Address byte with D0 = 0 ACK IB1 X000000X ACK IB2 XXX1X0XX ACK STOP 3b - Turn-Off of the power amplifier Start Address byte with D0 = 0 ACK IB1 X0XXXXXX ACK IB2 XXX0XXXX ACK STOP 4 - Offset detection procedure enable Start Address byte with D0 = 0 ACK IB1 XX1XX11X ACK IB2 XXX1X0XX ACK STOP 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). Start s s Address byte with D0 = 1 ACK DB1 ACK DB2 ACK DB3 ACK DB4 ACK STOP 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 leackage current or humidity between pins. 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) Start Address byte with D0 = 0 ACK IB1 XX01111X ACK IB2 XXX1X1XX ACK STOP 7 - Current detection reading operation (the results valid only for the current sensor detection bits - D5 of the bytes DB1, DB2, DB3, DB4). Start s s Address byte with D0 = 1 ACK DB1 ACK DB2 ACK DB3 ACK DB4 ACK STOP 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. The delay from 6 to 7 can be selected by software, starting from T.B.D. ms. 17/19 TDA7566 mm TYP. 4.50 1.90 1.40 0.90 0.39 1.00 24.00 29.23 17.00 12.80 0.80 22.47 18.97 15.70 7.85 5 3.5 4.00 4.00 2.20 2 1.70 0.5 0.3 1.25 0.50 inch TYP. 0.177 0.074 0.055 0.035 0.015 0.040 0.945 1.150 0.669 0.503 0.031 0.884 0.747 0.618 0.309 0.197 0.138 0.157 0.157 0.086 0.079 0.067 0.02 0.12 0.049 0.019 DIM. A B C D E F (1) G G1 H (2) H1 H2 H3 L (2) L1 L2 (2) L3 L4 L5 M M1 N O R R1 R2 R3 R4 V V1 V2 V3 MIN. 4.45 1.80 0.75 0.37 0.80 23.75 28.90 MAX. 4.65 2.00 1.05 0.42 0.57 1.20 24.25 29.30 MIN. 0.175 0.070 0.029 0.014 0.031 0.935 1.139 MAX. 0.183 0.079 0.041 0.016 0.022 0.047 0.955 1.153 OUTLINE AND MECHANICAL DATA 22.07 18.57 15.50 7.70 22.87 19.37 15.90 7.95 0.869 0.731 0.610 0.303 0.904 0.762 0.626 0.313 3.70 3.60 4.30 4.40 0.145 0.142 0.169 0.173 5 (T p.) 3 (Typ.) 20 (Typ.) 45 (Typ.) Flexiwatt25 (vertical) (1): dam-bar protusion not included (2): molding protusion included V C B V V3 H3 H H1 H2 R3 R4 V1 R2 R L L1 A L4 O L2 N L3 V1 V2 R2 L5 G G1 F FLEX25ME R1 R1 R1 E M M1 D Pin 1 7034862 18/19 TDA7566 Information furnished is believed to be accurate and reliable. However, STMicroelectronics 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 STMicroelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics. The ST logo is a registered trademark of STMicroelectronics 2002 STMicroelectronics - All Rights Reserved STMicroelectronics GROUP OF COMPANIES Australia - Brazil - Canada - China - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan -Malaysia - Malta - Morocco Singapore - Spain - Sweden - Switzerland - United Kingdom - United States. http://www.st.com (R) 19/19 |
Price & Availability of TDA7566
 |
|
|
|
|
All Rights Reserved © IC-ON-LINE 2003 - 2022 |
| [Add Bookmark] [Contact Us] [Link exchange] [Privacy policy] |
|
Mirror Sites : [www.datasheet.hk]
[www.maxim4u.com] [www.ic-on-line.cn]
[www.ic-on-line.com] [www.ic-on-line.net]
[www.alldatasheet.com.cn]
[www.gdcy.com]
[www.gdcy.net] |