TDA7383

TDA7383 ® 4 x 30W QUAD BRIDGE CAR RADIO AMPLIFIER HIGH OUTPUT POWER CAPABILITY: 4 x 35W/4Ω MAX. 4 x 30W/4Ω EIAJ 4 x 22W/4Ω @ 14.4V, 1KHz, 10% 4 x 18.5W/4Ω @ 13.2V, 1KHz, 10% CLIPPING DETECTOR LOW DISTORTION LOW OUTPUT NOISE ST-BY FUNCTION MUTE FUNCTION AUTOMUTE AT MIN. SUPPLY VOLTAGE DETECTION DIAGNOSTICS FACILITY FOR: – CLIPPING – OUT TO GND SHORT – OUT TO VS SHORT – THERMAL SHUTDOWN LOW EXTERNAL COMPONENT COUNT: – INTERNALLY FIXED GAIN (32dB) N – NO EXTERNAL COMPENSATION – NO BOOTSTRAP CAPACITORS S PROTECTIONS: OUTPUT SHORT CIRCUIT UIT TO GN GND, TO VS, ACROSS THE LOAD ) s t( c u d o r P e let FLEXIWATT25 ) s ( ct u d o r P e ORDERING NUMBER: MBER TD TDA7383 VERY INDUCTIVE VE LOADS LOA OVERRATING TING CHIP CH TEMPERATURE WITH T THERMA SOFT THERMAL LIMITER LOAD AD DUMP DUM VOLTAGE FORTUITOUS OPEN GND FORTU REVERSED BATTERY REV ESD PROTECTION t e l o s b -O DESCRIPTION The TDA7383 is a new technology class AB Audio Power Amplifier in Flexiwatt 25 package designed for high end car radio applications. BLOCK AND APPLICATION PLICAT DIAGRAM o s Ob Vcc1 Vcc2 2.200μF 100nF ST-BY DIAGN. OUT MUTE OUT1+ IN1 OUT10.1μF PW-GND OUT2+ IN2 OUT2PW-GND 0.1μF OUT3+ IN3 OUT30.1μF PW-GND OUT4+ IN4 OUT4PW-GND 0.1μF AC-GND 0.1μF SVR 47μF TAB S-GND D93AU002C March 2001 1/12 TDA7383 DESCRIPTION (continued) Thanks to the fully complementary PNP/NPN output configuration the TDA7383 allows a rail to rail output voltage swing with no need of bootstrap capacitors. The extremely reduced components count allows very compact sets. The on-board clipping detector simplifies gain compression operations. The fault diagnostics makes it possible to detect mistakes during CarRadio assembly and wiring in the car. ABSOLUTE MAXIMUM RATINGS DC Supply Voltage Peak Supply Voltage (t = 50ms) Output Peak Current: Repetitive (Duty Cycle 10% at f = 10Hz) Non Repetitive (t = 100μs) Ptot Power dissipation, (Tcase = 70°C) Tj Tstg Junction Temperature Storage Temperature ) s ( ct A A W °C °C t e l o s b O - D94AU117B P-GND4 DIAGNOSTICS MUTE OUT4- VCC OUT4+ OUT3- OUT3+ P-GND3 IN3 AC-GND IN4 25 IN2 SVR OUT1+ P-GND1 VCC OUT1- ST-BY OUT2+ OUT2- TAB V V u d o r P e 1 P-GND 28 50 80 ) s t( c u d o r eP s b O Unit V 150 – 55 to 150 PIN CONNECTION (Top view) t e l o Value 18 4.5 5.5 S-GND VCC (DC) VCC (pk) IO Parameter Operating Supply Voltage IN1 Symbol VCC THERMAL DATA Symbol Rth j-case 2/12 Parameter Thermal Resistance Junction to Case Max. Value 1 Unit °C/W TDA7383 ELECTRICAL CHARACTERISTICS (VS = 14.4V; f = 1KHz; RL = 4Ω; Tamb = 25°C; Refer to the Test and application circuit (fig.1), unless otherwise specified.) Symbol Iq1 VOS Gv Po Parameter Quiescent Current Test Condition Output Offset Voltage Voltage Gain Output Power THD = 10% THD = 1% THD = 10%; VS = 14V THD = 5%; VS = 14V THD = 1%; VS = 14V EIAJ Ouput Power (*) VS = 13.7V Po max. THD eNo Max. Output Power (*) Distortion Output Noise VS = 14.4V Po = 4W "A" Weighted Bw = 20Hz to 20KHz Supply Voltage Rejection Low Cut-Off Frequency High Cut-Off Frequency f = 100Hz SVR fcl fch Ri Input Impedance CT Cross Talk St-By Current Consumption ISB t e l o s b O - f = 1KHz Hz St-By = LOW ) s t( c u d o r P Typ. 180 Max. 300 Unit mA 31 32 200 33 mV dB 20 16.5 22 18 W W 19 17 16 21 19 17 W W W ) s ( t c u d o r P e THD = 10%; VS = 13.2V THD = 1%; VS = 13.2V Po EIAJ Min. 17 14 27.5 30 W 33 35 0.05 75 100 W % μV μV 50 70 100 KΩ 50 70 75 50 St-By OUT Threshold Voltage (Amp: ON) St-By IN Threshold Voltage e Mute Attenuation (Am (Amp: OFF) VO = 1Vrms 80 VM out Mute OUT Threshold hold Voltag Voltage (Amp: Play) 3.5 VM in Im (L) Mute IN Threshold shold Volta Voltage Muting g Pin Current Curren (Amp: Mute) VMUTE = 1.5V (Source Current) e t e l o s b O THD = 1% (**) ICDON ON C Clipping Detector "ON" Output Average Current THD = 10% (**) 150 dB Hz KHz VSB IN AM Clipping D Detector "OFF" Output Avera Average Current 0.3 65 20 VSB out ICDOFF W W 18.5 15 3.5 5 V 1.5 V dB 1.5 16 V μA 90 V 10 μA 100 100 dB μA 240 350 μA (*) Saturated Satura square wave output. Diagnostics output pulled-up to 5V with 10KΩ series resistor. (**) D 3/12 TDA7383 Figure 1: Standard Test and Application Circuit C8 0.1μF C7 2200μF Vcc1-2 Vcc3-4 6 R1 ST-BY 20 9 4 10K R2 C9 1μF MUTE 8 7 22 47K C10 1μF 5 C1 IN1 2 11 3 0.1μF IN2 12 17 C2 0.1μF 18 IN3 15 S-GND C5 0.1μF du o r eP OUT4 23 13 ) s ct( 4/12 OUT3 24 16 6 s b O ) s ( t c u d o r P OUT2 OUT 21 14 IN4 t e l o e t e l o s b -O 19 C3 0.1μF C4 0.1μF OUT1 10 25 SVR C6 47μF 1 TAB D94AU179B DIAGNOSTICS TDA7383 Figure 2: P.C.B. and component layout of the figure 1 (1:1 scale) COMPONENTS & TOP COPPER LAYER TDA7383 ) s ( ct u d o r P e t e l o ) (s s b O t c u BOTTOM COPPER LAYER d o r P e et l o s Ob 5/12 TDA7383 Figure 3: Quiescent Current vs. Supply Voltage Figure 5: Output Power vs. Supply Voltage Figure 4: Quiescent Output Voltage vs. Supply Voltage ) s ( t c u d o r P e stortion vs. vs Output Power Figure 6: Distortion t e l o s Ob THD (%) 10 0 Vs= 14.4 V RL = 4 Ohm e t e ol ) s ( t c u d o Pr bs 10 f= 10 KHz 0.1 0 f= 1 KHz 0.1 1 10 Po (W) Voltage Figure 8: Supply Frequency Figure 7: Distortion vs. Frequency. O 1 THD (%) 100 vs. SVR (dB) Rg= 600 Ohm Vripple= 1 Vrms 90 Vs= 14.4 V RL = 4 Ohm Po= 1 W Rejection 80 1 70 60 0.1 50 40 0 30 10 100 1000 f (Hz) 6/12 10000 10 100 1000 f (Hz) 10000 TDA7383 Figure 9: Output Noise vs. Source Resistance 200 Figure 10: Power Dissipation & Efficiency vs. Output Power Ptot (W) En (μV) 180 Vs= 14.4 V RL= 4 Ohm 160 140 120 22 - 22K Hz lin. 100 "A" wgtd 80 ) s ( t c u d ro 60 40 1 10 100 1k Rg (Ohm) 10k 100k APPLICATION HINTS (ref. to the circuit of fig. 1) BIASING AND SVR As shown by fig. 11, all the TDA7383’s main sections, such as INPUTS, OUTPUTS AND AC-GND (pin 16) are internally biased at half Supply Voltage level (Vs/2), which is derived from the Supply Voltage Rejection (SVR) block. In this way no curetwork. rent flows through the internal feedback network. e 4 amplifiers amplif The AC-GND is common to all the int of all the inand represents the connection point verting inputs. d AC-GND AC-G Both individual inputs and are connected to Vs/2 (SVR) by means of 100KΩ resistors. ) (s P e t e l o s b O t c u d o r P e t e l so roper operation ope To ensure proper and high supply voltection, it is of fundamental importance to age rejection, e a good impedance matching between INprovide TS and AC-GROUND terminations. This imPUTS plies that C1, C2, C3, C4, C5 CAPACITORS HAVE CARRY THE SAME NOMINAL VALUE AND TO CA TH THEIR TOLERANCE SHOULD NEVER EXCEED ±10 %. Besides its contribution to the ripple rejection, the SVR capacitor governs the turn ON/OFF time sequence and, consequently, plays an essential role in the pop optimization during ON/OFF transients. To conveniently serve both needs, ITS MINIMUM RECOMMENDED VALUE IS 10μF. Input/Output Biasing. Figure 11: Input/O 100KΩ + Ob 0.1μF C1 ÷ C4 8KΩ IN 400Ω 400Ω VS 8KΩ 10KΩ 70KΩ 10KΩ SVR 100KΩ AC_GND 47μF C6 0.1μF C5 + TOWARDS OTHER CHANNELS D95AU302 7/12 TDA7383 INPUT STAGE The TDA7383’s inputs are ground-compatible and can stand very high input signals (± 8Vpk) without any performances degradation. If the standard value for the input capacitors (0.1μF) is adopted, the low frequency cut-off will amount to 16 Hz. STAND-BY AND MUTING STAND-BY and MUTING facilities are both CMOS-COMPATIBLE. If unused, a straight connection to Vs of their respective pins would be admissible. Conventional low-power transistors can be employed to drive muting and stand-by pins in absence of true CMOS ports or microprocessors. R-C cells have always to be used in order to smooth down the transitions for preventing any audible transient noises. Since a DC current of about 10 uA normally flows out of pin 22, the maximum allowable muting-series resistance (R2) is 70KΩ, which is sufficiently high to permit a muting capacitor reasonably small (about 1μF). If R2 is higher than recommended, the involved risk will be that the voltage at pin 22 may rise to above the 1.5 V threshold voltage and the device will consequently fail to turn OFF when the mute line is brought down. ant to be asAbout the stand-by, the time constant tr signed in order to obtain a virtuallyy pop-free tran.5V/ms sition has to be slower than 2.5V/ms. ) s t( tion with microprocessor-driven audioprocessors. The maximum load that pin 25 can sustain is 1KΩ. Due to its operating principles, the clipping detector has to be viewed mainly as a power-dependFigure 12: Diagnostics circuit. R 25 VREF ) s ( t c u d o r P e t e l o s b -O Vpin 25 D95AU303A D9 Clipp Detection Waveforms. Figure e 13: Clipping c u d o r eP DIAGNOSTICS FACILITY CILITY The TDA7383 is equipped equippe with a diagnostics ciro detect the th following events: cuitry able to t e l o CLIPPING PING in the output stage OVERHEATING (THERMAL SHUT-DOWN OVERHEA proximity) proxim OUTPUT MISCONNECTIONS (OUT-GND & OU OUT-Vs shorts) Diagnostics information is available across an open collector output located at pin 25 (fig. 12) through a current sinking whenever at least one of the above events is recognized. Among them, the CLIPPING DETECTOR acts in a way to output a signal as soon as one or more power transistors start being saturated. As a result, the clipping-related signal at pin 25 takes the form of pulses, which are perfectly syncronized with each single clipping event in the music program and reflect the same duration time (fig. 13). Applications making use of this facility usually operate a filtering/integration of the pulses train through passive R-C networks and realize a volume (or tone bass) stepping down in associa- s b O 8/12 ent feature rather than frequency-dependent. This means that clipping state will be immediately signaled out whenever a fixed power level is reached, regardless of the audio frequency. In other words, this feature offers the means to counteract the extremely sound-damaging effects of clipping, caused by a sudden increase of odd order harmonics and appearance of serious intermodulation phenomena. Another possible kind of distortion control could be the setting of a maximum allowable THD limit (e.g. 0.5 %) over the entire audio frequency range. Besides offering no practical advantages, this procedure cannot be much accurate, as the non-clipping distortion is likely to vary over frequency. In case of OVERHEATING, pin 25 will signal out the junction temperature proximity to the thermal shut-down threshold. This will typically start about 2o C before the thermal shut-down threshold is TDA7383 Figure 14: Diagnostics Waveforms. ST-BY PIN VOLTAGE t MUTE PIN VOLTAGE ) s ( t c u d o r P e t e l o s b -O t Vs OUTPUT WAVEFORM t Vpin 25 WAVEFORM t CLIPPING CLIPPI D95AU304 ) s t( SHORT TO GND OR TO Vs reached. formation is i availAs various kind of diagnostics information HORTS AND A able at pin 25 (CLIPPING, SHORTS OVERessary to operate some HEATING), it may be necessary e distinctions on orderr to treat each event sepaachiev rately. This could be achieved by taking into acsically different diffe count the intrinsically timing of the diagut under each e nostics output circumstance. c u d e t e ol o r P THERMAL PROXIMITY In fact, clipping will produce pulses normally much shorter than those present under faulty conditions. An example of circuit able to distinguish between the two occurrences is shown by fig. 15. STABILITY AND LAYOUT CONSIDERATIONS If properly layouted and hooked to standard carradio speakers, the TDA7383 will be intrinsically stable with no need of external compensations Figure gure 15. s b O VREF T1 25 + T2 VREF1 + T1 > VREF2 CLIP DET. (TO GAIN COMPRESSOR/ TONE CONTROL) FAULT, THERMAL SHUTDOWN (TO POWER SUPPLY SECTION, μP VOLTAGE REGULATOR, FLASHING SYSTEM) VREF2 D95AU305A 9/12 TDA7383 such as output R-C cells. Due to the high number of channels involved, this translates into a very remarkable components saving if compared to similar devices on the market. To simplify pc-board layout designs, each amplifier stage has its own power ground externally accessible (pins 2,8,18,24) and one supply voltage pin for each couple of them. Even more important, this makes it possible to achieve the highest possible degree of separation among the channels, with remarkable benefits in terms of cross-talk and distortion features. About the layout grounding, it is particularly im- portant to connect the AC-GND capacitor (C5) to the signal GND, as close as possible to the audio inputs ground: this will guarantee high rejection of any common mode spurious signals. The SVR capacitor (C6) has also to be connected to the signal GND. Supply filtering elements (C7, C8) have naturally to be connected to the power-ground and located as close as possible to the Vs pins. Pin 1, which is mechanically attached to the device’s tab, needs to be tied to the cleanest power ground point in the pc-board, which is generally near the supply filtering capacitors. ) s ( ct u d o r P e t e l o ) (s t c u d o r P e et l o s Ob 10/12 s b O TDA7383 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 22.07 18.57 15.50 7.70 3.70 3.60 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 MAX. 4.65 2.00 MIN. 0.175 0.070 1.05 0.42 0.57 1.20 24.25 29.30 0.029 0.014 22.87 19.37 15.90 7.95 0.869 0.731 0.610 0.303 4.30 4.40 0.145 0.142 0.031 0.935 1.138 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 MAX. 0.183 0.079 0.041 0.016 0.022 0.047 0.955 1.153 0.904 0.762 0.626 0.313 ) s ( t c u d o r P e t e l o s Flexiwatt25 b -O 0.169 0.173 5˚ (Typ.) 3˚ (Typ.) 20˚ (Typ.) 45˚ (Typ.) (1): dam-bar protusion not included (2): molding protusion included OUTLINE AND MECHANICAL DATA ) s t( c u d o r P e t e l so H H1 V3 O H3 A H2 R3 L4 R4 V1 L2 N R L3 Ob R2 L L1 V1 V2 R2 D R1 L5 R1 R1 E G G1 F V M M1 B C V FLEX25ME 11/12 TDA7383 ) s ( ct u d o r P e t e l o ) (s s b O t c u d o r P e et l o s Ob 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. Specification 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 © 2001 STMicroelectronics – Printed in Italy – All Rights Reserved STMicroelectronics GROUP OF COMPANIES Australia - Brazil - China - Finland - France - Germany - Hong Kong - India - Italy - Japan - Malaysia - Malta - Morocco Singapore - Spain - Sweden - Switzerland - United Kingdom - U.S.A. http://www.st.com 12/12