TDA7382

TDA7382 ® 4 x 22W FOUR BRIDGE CHANNELS CAR RADIO AMPLIFIER HIGH OUTPUT POWER CAPABILITY: 4 x 30W max./4Ω EIAJ 4 x 22W/4Ω @ 14.4V, 1KHz, 10% 4 x 18.5W/4Ω @ 13.2V, 1KHz, 10% CLIPPING DETECTOR (THD = 10%) LOW DISTORTION LOW OUTPUT NOISE ST-BY FUNCTION MUTE FUNCTION AUTOMUTE AT MIN. SUPPLY VOLTAGE DETECTION LOW EXTERNAL COMPONENT COUNT: – INTERNALLY FIXED GAIN (26dB) – NO EXTERNAL COMPENSATION – NO BOOTSTRAP CAPACITORS PROTECTIONS: OUTPUT SHORT CIRCUIT TO GND, TO VS, ACROSS THE LOAD VERY INDUCTIVE LOADS OVERRATING CHIP TEMPERATURE WITH SOFT THERMAL LIMITER LOAD DUMP VOLTAGE FORTUITOUS OPEN GND ) s ( ct BLOCK AND APPLICATION DIAGRAM du Vcc1 o r P e ST-BY FLEXIWATT25 ORDERING NUMBER: TDA7382 REVERSED BATTERY ESD PROTECTION e t le o s b O Vcc2 2.200µF OUT1+ OUT1- 0.1µF PW-GND OUT2+ IN2 O 100nF CLIPPING DET. IN1 bs o r P DESCRIPTION The TDA7382 is a new technology class AB Audio Power Amplifier in Flexiwatt 25 package designed for high end car radio applications. Thanks to the fully complementary PNP/NPN output configuration the TDA7382 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. MUTE t e l o c u d ) s t( 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 D98AU818 March 2001 1/10 TDA7382 ABSOLUTE MAXIMUM RATINGS Symbol Parameter VCC VCC (DC) VCC (pk) IO Ptot Tj Value Unit Operating Supply Voltage 18 V DC Supply Voltage Peak Supply Voltage (t = 50ms) 28 50 V V Output Peak Current: Repetitive (Duty Cycle 10% at f = 10Hz) Non Repetitive (t = 100µs) 4.5 5.5 A A Power dissipation, (Tcase = 70°C) Junction Temperature 80 150 W °C – 55 to 150 °C Storage Temperature Tstg PIN CONNECTION (Top view) c u d e t le o r P o s b O - ) s ( ct 1 ) s t( 25 P-GND4 MUTE OUT4- OUT4+ D98AU820 CLIP. DET. s b O VCC OUT3- OUT3+ P-GND3 AC-GND IN3 IN4 IN2 S-GND IN1 SVR OUT1+ OUT1- P-GND1 VCC ST-BY OUT2+ OUT2- t e l o r P e P-GND TAB u d o THERMAL DATA Symbol Rth j-case 2/10 Parameter Thermal Resistance Junction to Case Max. Value 1 Unit °C/W TDA7382 ELECTRICAL CHARACTERISTICS (VS = 14.4V; f = 1KHz; Rg = 600Ω; RL = 4Ω; Tamb = 25°C; Refer to the Test and application circuit (fig.1), unless otherwise specified.) Symbol Iq1 VOS Gv Parameter Quiescent Current Output Offset Voltage Test Condition Typ. 180 Max. 300 100 Unit mA mV 25 26 27 dB 20 16.5 22 18 W W THD = 10%; VS = 13.5V 17 20 W THD = 10%; VS = 14V THD = 5%; VS = 14V THD = 1%; VS = 14V 19 17 16 21 19 17 W W W THD = 10%; VS = 13.2V THD = 1%; VS = 13.2V 17 14 18.5 15 W W Voltage Gain Output Power Po Min. 85 THD = 10% THD = 1% Po max Max. Output Power EIAJ RULES THD Distortion Po = 4W Output Noise "A" Weighted Bw = 20Hz to 20KHz Supply Voltage Rejection Low Cut-Off Frequency f = 100Hz 50 eNo SVR fcl fch 27.5 75 Input Impedance Cross Talk f = 1KHz 60 50 ISB St-By Current Consumption St-By OUT Threshold Voltage St-By = LOW (Amp: ON) St-By IN Threshold Voltage Mute Attenuation (Amp: OFF) VO = 1Vrms VSB out VSB IN AM VM out VM in Mute OUT Threshold Voltage CDL Clipping Detection THD Level uc (Amp: Play) (t s) Im (L) Mute IN Threshold Voltage Muting Pin Current o s b O - (Amp: Mute) VMUTE = 1.5V (Source Current) W ) s t( 0.3 % 50 65 120 150 µV µV dB Hz c u d 65 20 o r P High Cut-Off Frequency Ri CT e t le 30 0.04 130 KΩ dB 20 50 µA V 1.5 V dB V µA % 3.5 80 KHz 100 70 90 3.5 V 5 13 1.5 16 5 10 15 d o r P e t e l o s b O 3/10 TDA7382 Figure 1: Standard Test and Application Circuit C8 0.1µF C7 2200µF Vcc1-2 Vcc3-4 6 R1 ST-BY 20 9 4 10K C9 1µF R2 MUTE 8 22 47K C10 1µF 5 C1 IN1 2 11 12 17 C2 0.1µF 18 IN3 C3 0.1µF 21 14 IN4 S-GND 24 23 16 10 SVR C6 47µF ) s ( ct u d o r P e t e l o s b O 4/10 e t le 13 C5 0.1µF c u d 19 15 C4 0.1µF OUT2 3 0.1µF IN2 OUT1 7 so 25 b O - CLIPPING DET. o r P 1 TAB D98AU819 ) s t( OUT3 OUT4 TDA7382 Figure 2: P.C.B. and component layout of the figure 1 (1:1 scale) COMPONENTS & TOP COPPER LAYER TDA7382 c u d e t le BOTTOM COPPER LAYER ) s ( ct ) s t( o r P o s b O - u d o r P e t e l o s b O 5/10 TDA7382 Figure 3: Quiescent Current vs. Supply Voltage Figure 5: Output Power vs. Supply Voltage Figure 4: Quiescent Output Voltage vs. Supply Voltage Figure 6: Distortion vs. Output Power c u d e t le ) s ( ct u d o r P e Figure 7: Distortion vs. Frequency. t e l o s b O 6/10 ) s t( o r P o s b O - Voltage Rejection Figure 8: Supply Frequency by varying C6 Rg = 600Ω Vripple = 1Vrms vs. TDA7382 Figure 9: Output Noise vs. Source Resistance Figure 10: Power Dissipation & Efficiency vs. Output Power Ptot (W) Ptot Rg (Ω) INPUT STAGE The TDA7382’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. Figure 11: Input/Output Biasing. u d o r P e e t le o r P 100KΩ + - t e l o 0.1µF C1 ÷ C4 8KΩ IN bs O 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. About the stand-by, the time constant to be as- o s b O - 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 ) s ( ct c u d ) s t( 400Ω 400Ω VS 8KΩ 10KΩ 70KΩ 10KΩ SVR 100KΩ AC_GND 47µF C6 0.1µF C5 + TOWARDS OTHER CHANNELS D95AU302 7/10 TDA7382 signed in order to obtain a virtually pop-free transition has to be slower than 2.5V/ms. CLIPPING DETECTOR The CLIPPING DETECTOR acts in a way to output a signal as soon as one or more outputs reach or trespass a typical THD level of 10%. As a result, the clipping-related signal at pin 25 takes the form of pulses, which are syncronized with each single clipping event in the music program. 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 association 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-dependent feature rather than frequency-dependent. This means that clipping state causing THD = 10% typ. 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 heavy clipping, caused by a sudden increase of odd order harmonics and appearance of serious intermodulation phenomena. Figure 13: Clipping Detection Waveforms. Figure 12: Diagnostics circuit. VO AUDIO OUTPUT SIGNAL c u d R 25 VREF Vpin 25 ro ICLIP P e let TDA7382 D97AU810 0 Figure 14: Diagnostics Waveforms. ST-BY PIN VOLTAGE ) s ( ct t e l o s b O CLIPPING DET. OUTPUT CURR. time D97AU811 o s b O - t u d o r P e MUTE PIN VOLTAGE t Vs OUTPUT WAVEFORM t Vpin 25 WAVEFORM t CLIPPING 8/10 ) s t( D97AU812A TDA7382 DIM. MIN. 4.45 1.80 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 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 OUTLINE AND MECHANICAL DATA 0.041 0.016 0.022 0.047 0.955 1.153 0.904 0.762 0.626 0.313 0.169 0.173 c u d 5˚ (Typ.) 3˚ (Typ.) 20˚ (Typ.) 45˚ (Typ.) o r P Flexiwatt25 e t le (1): dam-bar protusion not included (2): molding protusion included H H1 V3 ) s ( ct O H3 o s b O - A H2 L4 R3 L3 L2 o r P e R4 du V1 R2 N R t e l o s b O ) s t( L L1 V1 V2 R2 D R1 L5 R1 R1 E G G1 F V M M1 B C V FLEX25ME 9/10 TDA7382 c u d e t le ) s ( ct ) s t( o r P o s b O - u d o r P e t e l o s b O 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. 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