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| TDA7388 4 X 41W QUAD BRIDGE CAR RADIO AMPLIFIER 1 FEATURES HIGH OUTPUT POWER CAPABILITY: 4 x 41W/4 MAX. 4 x 25W/4 @ 14.4V, 1KHz, 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 Figure 1. Package Flexiwatt25 Table 1. Order Codes Part Number TDA7388 Package Flexiwatt25 REVERSED BATTERY ESD 3 DESCRIPTION 2 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 The TDA7388 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 TDA7388 allows a rail to rail output voltage swing with no need of bootstrap capacitors. The extremely reduced components count allows very compact sets. Figure 2. Block and Application Diagram Vcc1 Vcc2 470F ST-BY N.C. OUT1+ IN1 0.1F OUT1PW-GND OUT2+ IN2 0.1F OUT2PW-GND OUT3+ IN3 0.1F OUT3PW-GND OUT4+ IN4 0.1F AC-GND 0.47F SVR 47F D99AU1018 100nF MUTE OUT4PW-GND TAB S-GND July 2005 Rev. 1 1/10 TDA7388 Table 2. Absolute Maximum Ratings Symbol VCC VCC (DC) VCC (pk) IO Parameter 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 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 Figure 3. Pin Connection 1 25 OUT2- OUT1- OUT3- P-GND2 P-GND1 AC-GND P-GND3 OUT4- P-GND4 OUT2+ OUT1+ S-GND OUT3+ OUT4+ ST-BY MUTE IN1 IN2 IN4 TAB VCC IN3 SVR VCC D94AU159A Table 3. Thermal Data Symbol Rth j-amb Parameter Thermal Resistance Junction to Case max Value 1 Unit C/W 2/10 HSD TDA7388 Table 4. Electrical Characteristcs (VS = 14.4V; f = 1KHz; Rg = 600; RL = 4;Tamb = 25C; Refer to the Test and application diagram, unless otherwise specified.) Symbol Iq1 VOS VOS Gv Po Po max THD eNo Parameter Quiescent Current Output Offset Voltage During Mute ON/OFF Output Offset Voltage Voltage Gain Output Power Max.Output Power (*) Distortion Output Noise Test Condition RL = Play Mode Min. 120 Typ. 190 Max. 350 80 80 Unit mA mV mV dB W W 25 THD = 10%; VS = 14.4V VS = 14.4V Po = 4W "A" Weighted Bw = 20Hz to 20KHz 22 38 26 26 41 0.04 50 70 27 0.15 70 100 % V V dB KHz K dB dB SVR fch Ri CT Supply Voltage Rejection High Cut-Off Frequency Input Impedance Cross Talk f = 100Hz; Vr = 1Vrms Po = 0.5W 50 100 70 65 200 100 70 60 50 f = 1KHz; Po = 4W f = 10KHz; Po = 4W 60 50 ISB VSB out VSB IN AM VM out VM in VAM in Ipin22 St-By Current Consumption St-By OUT Threshold Voltage St-By IN Threshold Voltage Mute Attenuation (Amp: ON) (Amp: OFF) POref = 4W 80 3.5 90 3.5 A V 1.5 V dB V Mute OUT Threshold Voltage (Amp: Play) Mute IN Threshold Voltage VS Automute Threshold Muting Pin Current (Amp: Mute) (Amp: Mute); Att 80dB; POref = 4 (Amp: Play); Att < 0.1dB; PO = 0.5 VMUTE = 1.5V (Source Current) 1.5 7.6 5 11 6.5 8.5 20 V V V A (*) Saturated square wave output. ( 3/10 TDA7388 Figure 4. 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 0.47F 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 HSD 1 TAB D95AU335B OUT4 4/10 TDA7388 4 P.C.B. AND COMPONENT LAYOUT OF THE FIGURE 4 Figure 5. Components & Top Copper Layer Figure 6. Bottom Copper Layer 5/10 TDA7388 Figure 7. Quiescent Current vs. Supply Voltage Figure 10. Distortion vs. Output Power Figure 8. Quiescent Output Voltage Supply Voltage Figure 11. Distortion vs. Frequency Figure 9. Output Power vs. Supply Voltage Figure 12. Supply Voltage Rejection vs. Frequency. 6/10 TDA7388 Figure 13. Output Noise vs. Source Resistance. Figure 14. Power Dissipation & Efficiency vs. Output Power. 5 APPLICATION HINTS (ref. to the circuit of fig. 4) 5.1 SVR 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 10F. 5.2 INPUT STAGE The TDA7388'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. 5.3 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 A 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 assigned in order to obtain a virtually pop-free transition has to be slower than 2.5V/ms. 7/10 TDA7388 Figure 15. Flexiwatt 25 Mechanical Data & Package Dimensions 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 1.139 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 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 8/10 TDA7388 6 REVISION HISTORY Table 5. Revision History Date July 2005 Revision 1 First Issue Description of Changes 9/10 TDA7388 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. All other names are the property of their respective owners (c) 2005 STMicroelectronics - All rights reserved STMicroelectronics group of companies Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan Malaysia - Malta - Morocco - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States of America www.st.com 10/10 |
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