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TDA7388A 4 x 42W quad bridge car radio amplifier Preliminary Data Features High output power capability: - 4 x 42W/4 max. - 4 x 27W/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 Clipping detector Offset detector Diagnostic facility for: - Out to GND short - Out to VS short - Thermal shutdown Flexiwatt27 Fortuitous open gnd Output DC offset detector Reversed battery ESD Description The TDA7388A is a new technology class AB audio power amplifier in Flexiwatt 27 package designed for high end car radio applications. Thanks to the fully complementary PNP/NPN output configuration the TDA7388A allows a rail to rail output voltage swing with no need of bootstrap capacitors. The extremely reduced components count allows very compact sets. The TDA7388A is also equipped with Clipping detector and Offset detector features. Protections: Output short circuit to gnd, to VS, across the load Very inductive loads Overrating chip temperature with soft thermal limiter Load dump voltage Table 1. Device summary Order code TDA7388A Package Flexiwatt27 Packing Tube December 2007 Rev 1 1/13 www.st.com 1 This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to change without notice. Contents TDA7388A Contents 1 2 Pins connection and test/application diagrams . . . . . . . . . . . . . . . . . . . 5 Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2.1 2.2 2.3 2.4 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Electrical characteristic curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 3 Application hints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 3.1 3.2 3.3 SVR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Input stage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Stand-by and Muting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 4 5 Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 2/13 TDA7388A List of tables List of tables Table 1. Table 2. Table 3. Table 4. Table 5. Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Thermal data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 3/13 List of figures TDA7388A List of figures Figure 1. Figure 2. Figure 3. Figure 4. Figure 5. Figure 6. Figure 7. Figure 8. Figure 9. Figure 10. Figure 11. Figure 12. Pins connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Standard test and application circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Quiescent current vs. supply voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Output power vs. supply voltage (4 Ohm) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Distortion vs. output power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Distortion vs. frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Supply voltage rejection vs. frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Crosstalk vs. frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Output noise vs. source resistance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Power dissipation & efficiency vs. output power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 ITU R-ARM frequency response, weighting filter for transient pop. . . . . . . . . . . . . . . . . . . . 9 Flexiwatt27 mechanical data and package dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 4/13 TDA7388A Pins connection and test/application diagrams 1 Pins connection and test/application diagrams Figure 1. Pins connections 1 27 TAB OFF.DET P-GND2 OUT2- ST-BY OUT2+ VCC VCC MUTE OUT4- P-GND4 OUT4+ OUT1- P-GND1 P-GND3 OUT1+ S-GND AC-GND OUT3+ OUT3- SVR FLEX27_O Figure 2. Standard test and application circuit OFFSET DETECTOR C8 0.1F C7 2200F Vcc1-2 R1 7 5 10K R2 C9 1F 23 47K C1 C10 1F 12 0.1F Vcc3-4 21 2 10 9 8 OUT1 R4 47K ST-BY MUTE 6 3 4 OUT2 IN1 IN2 C2 0.1F IN3 C3 0.1F IN4 C4 0.1F S-GND 13 18 19 OUT3 16 20 22 15 14 17 C5 0.47F C6 47F 11 SVR 26 CD R3 47K CD OUT 1, 27 TAB V 25 24 OUT4 D05AU1614MOD1 TAB IN1 IN2 IN4 IN3 CD 5/13 Electrical specifications TDA7388A 2 2.1 Electrical specifications Absolute maximum ratings Table 2. Symbol VS VS (DC) VS (pk) IO Ptot Tj Tstg Absolute maximum ratings 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 2.2 Thermal data Table 3. Symbol Rth j-amb Thermal data Parameter Thermal resistance junction to ambient max. Value 1 Unit C/W 2.3 Table 4. Electrical characteristics Electrical characteristics (VS = 14.4V; f = 1KHz; Rg = 600; RL = 4;Tamb = 25C; Refer to the test and application diagram (Figure 2), unless otherwise specified.) Parameter Quiescent current Output offset voltage RL = Play mode -10 -50 25 26 Test condition Min. 100 Typ. 190 Max. 350 100 +10 +50 27 1 THD = 10%; VS = 14.4V VS = 14.4V 25 39 27 42 Unit mA mV mV mV dB dB W W Symbol Iq1 VOS dVOS During mute ON/OFF output offset voltage ITU R-ARM weighted see Figure 11 During St-By ON/OFF output offset voltage Voltage gain Channel gain unbalance Output power Max.output power(1) Gv Gv Po Po max 6/13 TDA7388A Table 4. Electrical specifications Electrical characteristics (continued) (VS = 14.4V; f = 1KHz; Rg = 600; RL = 4;Tamb = 25C; Refer to the test and application diagram (Figure 2), unless otherwise specified.) Parameter Distortion Output noise Bw = 20Hz to 20KHz Supply voltage rejection High cut-off frequency Input Impedance f = 1KHz; Po = 4W Cross talk f = 10KHz; Po = 4W St-By current consumption St-By pin current VSt-By = 0V VSt-By = 1.2 to 2.6V 2.6 1.2 80 2.6 1.2 6.5 8.5 90 60 20 10 dB A A V V dB V V V V f = 100Hz; Vr = 1Vrms Po = 0.5W 50 100 70 60 70 65 200 100 70 100 Po = 4W "A" Weighted Test condition Min. Typ. 0.04 50 Max. 0.10 70 Unit % V V dB KHz K dB Symbol THD eNo SVR fch Ri CT ISB Ipin4 VSB out VSB IN AM VM out VM in St-By OUT threshold voltage (Amp: ON) St-By IN threshold voltage Mute attenuation (Amp: OFF) POref = 4W Mute OUT threshold voltage (Amp: Play) Mute IN threshold voltage (Amp: Mute) (Amp: Mute); Att 80dB; POref = 4W (Amp: Play); Att < 0.1dB; PO = 0.5W VMUTE = 1.2V (Source current) VAM in VS automute threshold 7.6 Ipin22 Muting pin current 5 11 20 A Offset detector Voff VOFF LK VOFF SAT Detected diff. output offset VOFF high leakage current VST-BY =5V OD off 300 1.4 2 2.6 10 V A mV VOFF det saturation voltage OD on; IOD = 1mA Clipping detector CDLK CDSAT CDTHD Clip det high leakage current CD Off Clip det sat voltage Clip det THD level DC On; ICD = 1mA 300 0.2 10 A mV % 1. Saturated square wave output. 7/13 Electrical specifications TDA7388A 2.4 Figure 3. Electrical characteristic curves Quiescent current vs. supply voltage Figure 4. Output power vs. supply voltage (4 Ohm) Id (mA) 200 190 180 170 160 150 140 8 10 12 Vs (V) 14 16 18 AC00531 Po (W) 45 40 35 30 25 20 15 10 5 8 9 10 11 12 13 Vs (V) 14 15 16 17 18 AC00532 Vin = 0 RL = 4 RL= 4 f= 1 KHz THD = 10% THD = 1% Figure 5. Distortion vs. output power Figure 6. Distortion vs. frequency 10 THD (%) Vs = 14.4V RL = 4 10 THD (%) Vs = 14.4V RL = 4 Po = 4W 1 f = 10 KHz 0.1 f = 1 KHz 1 0.1 0.01 0.1 1 Po (W) 10 100 AC00533 0.01 10 100 1000 f (Hz) 10000 100000 AC00534 Figure 7. Supply voltage rejection vs. frequency Figure 8. Crosstalk vs. frequency 100 90 80 70 60 SVR (dB) 100 90 80 70 60 SVR (dB) 50 40 30 20 10 100 1000 f (Hz) 10000 100000 AC00535 Rg = 600 Vripple = 1 Vrms 50 40 30 10 RL = 4 Po = 4W Rg = 600 100 1000 f (Hz) 10000 100000 AC00536 8/13 TDA7388A Electrical specifications Figure 9. Output noise vs. source resistance Figure 10. Power dissipation & efficiency vs. output power 80 70 60 50 22-22K Hz lin 40 Pdiss 30 "A" wgtd 20 10 0 30 20 10 0 24 Pdiss (W) Vs = 13.2V RL = 4 x 4 f = 1 KHz (%) 80 70 60 50 40 180 160 140 120 100 80 60 40 20 0 1 En (V) Vs = 14.4V RL = 4 10 100 Rg () 1000 10000 AC00537 0 2 4 6 8 10 12 Po (W) 14 16 18 20 22 Figure 11. ITU R-ARM frequency response, weighting filter for transient pop 10 0 Output attenuation (dB) -10 -20 -30 -40 -50 10 100 1000 Hz 10000 100000 AC00343 9/13 Application hints TDA7388A 3 Application hints Ref. to the circuit of Figure 2. 3.1 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. 3.2 Input stage The TDA7388A'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. 3.3 Stand-by and Muting Stand-by and Muting facilities are both 3.3V 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 10A normally flows out of pin 23, 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 23 may rise to above the 1.5V 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. 10/13 TDA7388A Package information 4 Package information In order to meet environmental requirements, ST (also) offers these devices in ECOPACK(R) packages. ECOPACK(R) packages are lead-free. The category of second Level Interconnect is marked on the package and on the inner box label, in compliance with JEDEC Standard JESD97. The maximum ratings related to soldering conditions are also marked on the inner box label. ECOPACK is an ST trademark. ECOPACK specifications are available at: www.st.com. Figure 12. Flexiwatt27 mechanical data and 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 25.75 28.90 mm TYP. 4.50 1.90 1.40 0.90 0.39 1.00 26.00 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 26.25 29.30 MIN. 0.175 0.070 0.029 0.014 0.031 1.014 1.139 inch TYP. 0.177 0.074 0.055 0.035 0.015 0.040 1.023 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 1.033 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 (Typ.) 3 (Typ.) 20 (Typ.) 45 (Typ.) Flexiwatt27 (vertical) (1): dam-bar protusion not included (2): molding protusion included V C B V H H1 H3 O H2 R3 R4 V1 N V3 A L4 R2 R L L1 L2 L3 V1 V2 R2 L5 G G1 F R1 R1 R1 E FLEX27ME D Pin 1 M M1 7139011 11/13 Revision history TDA7388A 5 Revision history Table 5. Date 6-Dec-2007 Document revision history Revision 1 Initial release. Changes 12/13 TDA7388A Please Read Carefully: Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries ("ST") reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST's terms and conditions of sale. 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