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| (R) TDA7382 4 x 22W FOUR BRIDGE CHANNELS CAR RADIO AMPLIFIER HIGH OUTPUT POWER CAPABILITY: 4 x 30W max./4 EIAJ 4 x 22W/4 @ 14.4V, 1KHz, 10% 4 x 18.5W/4 @ 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 BLOCK AND APPLICATION DIAGRAM Vcc1 Vcc2 2.200F ST-BY CLIPPING DET. OUT1+ IN1 0.1F OUT1PW-GND OUT2+ IN2 0.1F OUT2PW-GND OUT3+ IN3 0.1F OUT3PW-GND OUT4+ IN4 0.1F AC-GND 0.1F SVR 47F TAB S-GND OUT4PW-GND 100nF FLEXIWATT25 ORDERING NUMBER: TDA7382 REVERSED BATTERY ESD PROTECTION 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 D98AU818 September 1999 1/10 TDA7382 ABSOLUTE MAXIMUM RATINGS Symbol VCC VCC (DC) VCC (pk) IO Operating Supply Voltage DC Supply Voltage Peak Supply Voltage (t = 50ms) Output Peak Current: Repetitive (Duty Cycle 10% at f = 10Hz) Non Repetitive (t = 100s) Power dissipation, (Tcase = 70C) Junction Temperature Storage Temperature Parameter Value 18 28 50 4.5 5.5 80 150 - 55 to 150 Unit V V V A A W C C Ptot Tj Tstg PIN CONNECTION (Top view) 1 25 D98AU820 THERMAL DATA Symbol Rth j-case Parameter Thermal Resistance Junction to Case Max. Value 1 Unit C/W 2/10 CLIP. DET. AC-GND IN1 IN2 IN4 IN3 OUT2- OUT3- OUT1- P-GND S-GND P-GND3 OUT4- ST-BY SVR P-GND1 P-GND4 VCC TAB VCC OUT2+ OUT3+ OUT1+ OUT4+ MUTE TDA7382 ELECTRICAL CHARACTERISTICS (VS = 14.4V; f = 1KHz; Rg = 600; RL = 4; Tamb = 25C; Refer to the Test and application circuit (fig.1), unless otherwise specified.) Symbol Iq1 VOS Gv Po Parameter Quiescent Current Output Offset Voltage Voltage Gain Output Power THD = 10% THD = 1% THD = 10%; VS = 13.5V THD = 10%; VS = 14V THD = 5%; VS = 14V THD = 1%; VS = 14V THD = 10%; VS = 13.2V THD = 1%; VS = 13.2V Po max THD eNo SVR fcl fch Ri CT ISB VSB out VSB IN AM VM out VM in Im (L) CDL Max. Output Power Distortion Output Noise Supply Voltage Rejection Low Cut-Off Frequency High Cut-Off Frequency Input Impedance Cross Talk St-By Current Consumption St-By OUT Threshold Voltage St-By IN Threshold Voltage Mute Attenuation Mute OUT Threshold Voltage Mute IN Threshold Voltage Muting Pin Current Clipping Detection THD Level f = 1KHz St-By = LOW (Amp: ON) (Amp: OFF) VO = 1Vrms (Amp: Play) (Amp: Mute) VMUTE = 1.5V (Source Current) 5 5 13 10 80 3.5 1.5 16 15 90 3.5 1.5 75 60 50 100 70 20 100 130 EIAJ RULES Po = 4W "A" Weighted Bw = 20Hz to 20KHz f = 100Hz 50 25 20 16.5 17 19 17 16 17 14 27.5 26 22 18 20 21 19 17 18.5 15 30 0.04 50 65 65 20 0.3 120 150 Test Condition Min. 85 Typ. 180 Max. 300 100 27 Unit mA mV dB W W W W W W W W W % V V dB Hz KHz K dB A V V dB V V A % 3/10 TDA7382 Figure 1: Standard Test and Application Circuit C8 0.1F C7 2200F Vcc1-2 Vcc3-4 6 20 9 8 OUT1 R1 ST-BY 10K R2 MUTE 47K C1 IN1 0.1F IN2 C2 0.1F IN3 C3 0.1F IN4 C4 0.1F S-GND 14 13 16 C5 0.1F SVR C6 47F 10 15 12 11 C10 1F C9 1F 22 4 7 5 2 3 OUT2 17 18 19 OUT3 21 24 23 25 1 TAB D98AU819 OUT4 CLIPPING DET. 4/10 TDA7382 Figure 2: P.C.B. and component layout of the figure 1 (1:1 scale) COMPONENTS & TOP COPPER LAYER TDA7382 BOTTOM COPPER LAYER 5/10 TDA7382 Figure 3: Quiescent Current vs. Supply Voltage Figure 4: Quiescent Output Voltage vs. Supply Voltage Figure 5: Output Power vs. Supply Voltage Figure 6: Distortion vs. Output Power Figure 7: Distortion vs. Frequency. Figure 8: Supply Voltage Rejection Frequency by varying C6 R g = 600 Vripple = 1Vrms vs. 6/10 TDA7382 Figure 9: Output Noise vs. Source Resistance Figure 10: Power Dissipation & Efficiency vs. Output Power Ptot (W) Ptot R g () 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 (0.1F) 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 Figure 11: Input/OutputBiasing. 100K 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 70K, which is sufficiently high to permit a muting capacitor reasonably small (about 1F). 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- + 0.1F C1 / C4 IN 8K 400 400 VS 10K 70K 10K SVR 100K 47F C6 AC_GND 0.1F C5 D95AU302 8K + TOWARDS OTHER CHANNELS 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 Figure 12: Diagnostics circuit. 1K. 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. VO AUDIO OUTPUT SIGNAL 25 R VREF Vpin 25 ICLIP TDA7382 D97AU810 0 CLIPPING DET. OUTPUT CURR. time D97AU811 Figure 14: Diagnostics Waveforms. ST-BY PIN VOLTAGE t MUTE PIN VOLTAGE t Vs OUTPUT WAVEFORM t Vpin 25 WAVEFORM t CLIPPING D97AU812A 8/10 TDA7382 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 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 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 1.138 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 OUTLINE AND MECHANICAL DATA 22.07 18.57 15.50 7.70 3.70 3.60 22.87 19.37 15.90 7.95 4.30 4.40 0.869 0.731 0.610 0.303 0.145 0.142 0.904 0.762 0.626 0.313 0.169 0.173 5 (Typ.) 3 (Typ.) 20 (Typ.) 45 (Typ.) Flexiwatt25 (1): dam-bar protusion not included (2): molding protusion included V3 H3 O H H1 H2 R3 R4 V1 N A L4 R2 R L L1 L2 L3 V1 V2 D R1 R1 E G V G1 F M B M1 R2 L5 R1 C V FLEX25ME 9/10 TDA7382 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 (c) 1999 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 10/10 |
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