ST TDA7562 handbook
Contents
1. THD 10 L Vs 14 4V L RL 4 Ohm Po 4W 1 0 1 0 01 10 100 1000 10000 a TDA7562 Figure 8 Distortion vs Frequency 20 Figure 11 Power Dissipation amp Efficiency vs Output Power 40 STD SINE THD Piot W n 10 90 90 BU Vs 14 4 V 80 RL 4x 4 Ohm n Vs 14 4 V 70 f 1 KHz SINE 70 RL 2 Ohm 1 Po 8W 60 60 50 50 Ptot 40 40 0 1 30 30 20 20 10 10 0 01 10 100 1000 10000 0 0 f Hz 0 2 4 6 8 10 12 14 16 18 20 22 24 26 Po W Figure 9 Crosstalk vs Frequency Figure 12 Power Dissipation vs Average Ouput Power Audio Program qe Simulation 4Q Ptot W 80 45 407 Vs 14V 70 RL 4 x 4 Ohm 35 GAUSSIAN NOISE 60 CLIP RL 40hm 30 START so__Po 4W Rg 600 Ohm 25 40 20 30 15 20 10 00 1000 10000 10 f Hz 5 0 12. Short Circuit Protection amp Diagnostic e Short Circuit Protection amp Diagnostic May 2003 1 17 TDA7562 ABSOLUTE MAXIMUM RATINGS Symbol Parameter Vop Vs Vo Operating Supply Voltage Vo Vs DC Supply Voltage Voe Vpeak Peak Supply Voltage for t 50ms Vo O CK pin Voltage Data Pin Voltage Output Peak Current not repetitive t 100us lo Output Peak Current repetitive f gt 10Hz Prot Power Dissipation Tcase 70 C Storage and Junction Temperature THERMAL DATA Symbol Te mmer OO OO ve Uni Rihj case Thermal Resistance Junction to case Max PIN CONNECTION Top view TAB DATA PW_GND RR OUT RR CK OUT RR Vcc2 OUT RF PW_GND RF OUT RF AC GND IN RF IN RR S_GND IN LR IN LF SVR OUT LF PW_GND LF OUT LF Voci OUT LR CD OUT OUT LR PW_GND LR STBY TAB D00AU1230 D 2 17 TDA7562 Figure 1 Application Circuit D00AU1231A a 3 17 TDA7562 ELECTRICAL CHARACTERISTICS Refer to the test circuit Vs 14 4V RL 4Q f 1KHZ Tamb 25 C unless otherwise specified POWER AMPLIFIER Supply Voltage Range la Total Quiescent Drain Current Output Power THD Total Harmonic Distortion Voltage Gain 1 Voltage Gain Match 1 Voltage Gain 2 G AGV G AGv2 Voltage Gain Match 2 Output Noise Voltage 1 Output Noise Voltage 2 Supply Voltage Rejection E
3. BY OUT DIAG ENABLE 500 ms min MUTING OUT TURN OFF MUTING IN 20 ms DIAG DISABLE STAND BY IN 10ms PIN2 0 Car Radio Installation PIN2 gt 7V 10ms DIAG ENABLE write 200 ms DC read repeat until All faults disappear OFFSET TEST Device in Play no signal OFFSET ENABLE 30ms 1 C reading repeat IC reading until high offset message disappears FAST MUTING The muting time can be shortened to less than 1ms by setting IB2 D5 1 This option can be useful in transient battery situations i e during car engine cranking to quickly turnoff the amplifier for avoiding any audible effects caused by noise transients being injected by preamp stages 10 17 GU TDA7562 CC BUS INTERFACE Data transmission from microprocessor to the TDA7562 and viceversa takes place through the 2 wires 1 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 16 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 17 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
4. C BUS INTERFACE Clock Frequency a 5 17 TDA7562 Figure 2 Quiescent Current vs Supply Voltage Id MA 250 230 Vin 0 NO LOADS 210 190 170 150 130 110 90 8 10 121 41 6 18 Vs V Figure 3 Output Power vs Supply Voltage 49 Po W 70 65 60 55 50 45 40 35 30 Vs V Figure 4 Output Power vs Supply Voltage 29 Po W 80 75 70 THD 10 THD 1 8 9 10 11 12 13 14 15 16 6 17 Figure 5 Distortion vs Output Power 4Q THD 10 L Va 14 4 V L BL 4 Ohm 1 f 10 KHz 0 1 f 1 KHz 0 01 0 1 1 10 Po W Figure 6 Distortion vs Output Power 29 THD 10 vs 14 4V L RL 2 Ohm 1 10 KHz 1 KHz 0 1 0 01 0 1 1 10 Po W Figure 7 Distortion vs Output Power 49
5. 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 18 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 uP when it writes an address to the TDA7562 slave TDA7562 when the uP reads a data byte from TDA7562 Receiver slave TDA7562 when the uP writes an address to the TDA7562 master uP when it reads a data byte from TDA7562 Figure 16 Data Validity on the I CBUS ae A DATA LINE CHANGE STABLE DATA DATA VALID ALLOWED D99AU1031 Figure 17 Timing Diagram on the I CBUS eee em d ACKNOWLEDGMENT D99AU1033 FROM RECEIVER SI 11 17 TDA7562 SOFTWARE SPECIFICATIONS All the functions of the TDA7562 are activated by IC interface The bit 0 of the ADDRESS BYTE defines if the next bytes are write instruction from uP to TDA7562 or read instruction from TDA7562 to uP Chip Address D7 DO X 0 Write to device X 1 Read from device If R W 0 the uP sends 2 Instruction Bytes IB1 and IB2 cu enable D6 1 Diagnostic defeat D6 0 Offset Detection enable D5 1 Offset Detection defeat D5 0 Front Channel Gain 30dB D4 0 Gain 16dB D4 1 Rear Channel Gain 30dB D3
6. ohm speaker unconnected is considered as double fault Double fault table for Turn On Diagnostic LS GND 50 S GND sk S GND so S GND S GND S Vs S GND S GND see __ se sw ss 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 so CH sk CH FAULTS AVAILABILITY All the results coming from 12Cbus 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 To guarantee always resident functions every kind of diagnostic cycles will be reactivate after any GC reading operation So when the micro reads the DC 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 turned On with a short to Gnd then the short is removed and micro reads IC The short to Gnd is still present in bytes because it is the result of the previous cycle If another ke reading operation occurs the bytes do not show the short In general to observe a change in Diagnostic bytes two 2C reading operations are necessary CC 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 PIN2 gt 7V 10ms STAND
7. 0 Gain 16dB D3 1 Mute front channels D2 0 Unmute front channels D2 1 Mute rear channels D1 0 Unmute rear channels D1 1 CD 2 DO 0 CD 10 DO 1 used for testing Normal muting time D5 0 Fast muting time D5 1 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 12 17 GU TDA7562 If R W 1 the TDA7562 sends 4 Diagnostics Bytes to uP D I DB2 DB3 and DB4 D I Thermal warning active D7 1 Diag cycle not activated or not terminated D6 0 Diag cycle terminated D6 1 Channel LF Normal load D3 0 Short load D3 1 Channel LF 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 Offset detection not activated D7 0 Offset detection activated D7 1 Channel LR Normal load D3 0 Short load D3 1 Channel LR 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 a 13 17 TDA7562 D7 14 17 Stand by status IB1 D4 Channel RF Turn on diagnostic D4 0 X Channel RF Normal load D3 0 Short load D3 1 Channel RF No output offset D2 0 Ou
8. 2 3 4 5 Po W Figure 10 Supply Voltage Rejection vs Freq Figure 13 Power Dissipation vs Average Ouput Power Audio Program S SVR dB Simulation 20 Ptot W 80 90 80 70 Vs 14V 70 RL 4x2 Ohm GAUSSIAN NOISE CLIP 60 60 START 50 50 Au Rg 600 Ohm 40 40 Vripple 1 Vpk 30 30 20 20 10 100 1000 10000 10 Hz d 0 2 3 4 5 6 Z 8 Po W IST 7 17 TDA7562 DIAGNOSTICS FUNCTIONAL DESCRIPTION Detectable conventional faults are SHORT TO GND SHORT TO Vs SHORT ACROSS THE SPEAKER The following additional features are provided OUTPUT OFFSET DETECTION The TDA7562 has 2 operating statuses 1 RESTART mode The diagnostic is not enabled Each audio channel operates independently from each oth er 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 14 Restart takes place when the overload is removed 2 DIAGNOSTIC mode It is enabled via 12C 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 15 To avoid momentary re circulation spikes from giving erroneous diagnostics a check of the output status is made after ims if normal situation no overloads is detected the diagnostic is not per formed and the channel returns back active Instead if an
9. 2211550 1870 1890 0510 oera oe 7 70 7 85 7 95 0 309 0 313 E as nas 0 142 3 5 5 0138 138 ee 360 f 440 303 0 145 0 142 0 157 220 Flexiwatt27 vertical 1 dam bar protusion not included 2 molding protusion included FLEX27ME 7139011 a 16 17 TDA7562 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 2003 STMicroelectronics All Rights Reserved STMicroelectronics GROUP OF COMPANIES Australia Brazil Ca
10. GL TDA7562 MULTIFUNCTION QUAD POWER AMPLIFIER WITH BUILT IN DIAGNOSTICS FEATURES m DMOS POWER OUTPUT m HIGH OUTPUT POWER CAPABILITY 4x25W 40 14 4V 1KHZ 10 THD 4x35W EIAJ m MAX OUTPUT POWER 4x60W 2Q m FULL I C BUS DRIVING ST BY INDEPENDENT FRONT REAR SOFT PLAY MUTE SELECTABLE GAIN 30dB 16dB FOR LOW NOISE LINE OUTPUT FUNCTION DC BUS DIGITAL DIAGNOSTICS m FULL FAULT PROTECTION m DC OFFSET DETECTION m FOUR INDEPENDENT SHORT CIRCUIT PROTECTION m CLIPPING DETECTOR PIN WITH SELECTABLE THRESHOLD 2 10 m ST BY MUTE PIN m ESD PROTECTION DESCRIPTION The TDA7562 is a new BCD technology Quad BLOCK DIAGRAM CLK DATA VCC1 a ST BY MUTE MULTIPOWER BCD TECHNOLOGY MOSFET OUTPUT POWER STAGE FLEXIWATT27 Vertical Bridge type of car radio amplifier in Flexiwatt27V package specially intended for car radio applica tions Thanks to the DMOS output stage the TDA7562 has 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 1 C bus The possibility to control the configuration and the behaviour of the device by means of the DC bus makes TDA7562 a very flexible machine VCC2 a Thermal Ref Protection malai A amp Dump IN RE Al Short Circuit Protection Diagnostic e Short Circuit Protection amp Diagnostic
11. IN Ein2 S A V V St By Mute pin for Mute St By Mute pin for Operating St By Mute pin Current Clip Det High Leakage Current Clip Det Sat Voltage Clip Det THD level TOFF Vspy V V CT Rin VI v2 VR BW SB ISB AM OS AM ON MU OP IMU CDLK CDsat CDTHD 4 17 Test Gonaition Win Typ max J Unit e ia ae 80 200 EIAJ Vs 13 7V 5 Ww THD 10 THD 1 Ri 2Q EIAJ Vs 13 7V RL 29 THD 10 RL 2Q THD 1 RL 2Q MAX POWER KQ Rg 6000 20Hz to 22kHz Rg 6009 GV 16dB 20Hz to 22kHz f 100Hz to 10kHz Vr 1Vpk Rg 600Q lt D2 D1 IB1 0 to 1 D2 D1 IB1 1 to 0 VSTBY MUTE lt 1 5V CD off CD on Icp 1mA DO IB1 0 IB1 1 D TDA7562 ELECTRICAL CHARACTERISTICS continued Refer to the test circuit Vs 14 4V RL 4Q f 1KHZ Tamb 25 C unless otherwise specified Symbol emaer 1 TestCondion Min Tp Mex Unit DIAGNOSTICS Power Amplifier Mode or Line Driver Mode 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 Short to Vs det above this limit the Output is considered in Short Circuit to Vs Normal operation thresholds Within these limits the Output is considered without faults Shorted Load det Power Amplifier Mode Press Line Driver Mode l oaeen HH E 1 P 1
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13. overload is detected during the check after 1 ms then a diagnostic cycle having a du ration 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 microproces sor level over half a second is recommended Figure 14 Restart timing without Diagnostic Enable Each 1mS time a sampling of the fault is done Overcurrent and short circuit protection intervention Short circuit removed i e short circuit to GND Figure 15 Restart timing with Diagnostic Enable Overcurrent and short Short circuit removed i e short circuit to GND 8 17 IST TDA7562 As for SHORT TO GND Vs the fault detection thresholds remain unchanged from 30 dB to 16 dB gain setting They are as follows S C to GND Normal Operation S C to Vs ON 1 99 1 8V Val EN Vg 1 2V Vs D01AU1253 Concerning SHORT ACROSS THE SPEAKER the threshold varies from 30 dB to 16 dB gain setting since different loads are expected either normal speaker s impedance or high impedance The values in case of 30 dB gain are as follows S C across Load Normal O
14. peration OV 0 52 1 50 Infinite D01AU1254mod If the Line Driver mode Gv 16 dB and Line Driver Mode diagnostic 1 is selected the same thresholds will change as follows S C across Load Normal Operation 00 1 5Q 4 50 infinite D01AU1252mod 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 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 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 ke reading and faults removal provided that the diagnostic is enabled The table below shows all the couples of double fault possible It should be taken into account that a short circuit IST 9 17 TDA7562 with the 4
15. tput 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 Channel RR RNormal load D3 0 Short load D3 1 Channel RR 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 Dy TDA7562 Examples of bytes sequence 1 Turn On of the power amplifier with 30dB gain mute on diagnostic defeat CD 2 X0000000 XXX1XX11 2 Turn Off of the power amplifier XOXXXXXX XXXOXXXX 3 Offset detection procedure enable XX1XX11X XXX1 XXXX 4 Offset detection procedure stop and reading operation the results are valid only for the offset detection bits D2 of the bytes D I DB2 DB3 DB4 m 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 m The delay from 4 to 5 can be selected by software starting from T B D ms SI 15 17 TDA7562 CG Ben ES di N VD VA di N VD VA Edita 0 183 OUTLINE AND 0 070 MECHANICAL DATA Pe Em eee ee i 0 055 07s 0 90 1 08 0 085 0 095 007 BEE F0 0 57 r 0 022 Laan Lann ae Loser Lann A e ee ers mazo f 066 C Mma foss i SEE D E 0 869 0 884 0 904 18 57 18 97 19 37 0 731 0 747 0 762
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ST TDA7562 handbook