TDA7384A 4 x 42W quad bridge car radio amplifier Features ■ High output power capability: – 4 x 42W/4Ω max. – 4 x 27W/4Ω @ 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 Flexiwatt25 ■ Protections: Description ■ 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 ■ Reversed battery Table 1. ESD The TDA7384A 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 TDA7384A allows a rail to rail output voltage swing with no need of bootstrap capacitors. The extremely reduced components count allows very compact sets. Device summary Order code Package Packing TDA7384A Flexiwatt25 Tube December 2007 Rev 2 1/14 www.st.com 1 Contents TDA7384A Contents 1 Block and pins connection diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2 Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 3 2.1 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2.2 Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2.3 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2.4 P.C.B. and component layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 2.5 Electrical characteristic curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Application hints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 3.1 SVR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 3.2 Input stage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 3.3 Stand-by and Muting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 4 Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 5 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 2/14 TDA7384A 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 3/14 List of figures TDA7384A 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. Figure 13. Figure 14. 4/14 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Pins connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Standard test and application circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Components and top copper layer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Bottom copper layer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Quiescent current vs. supply voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Quiescent current vs. supply current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Output power vs. supply voltage (4Ω). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Distortion vs. output power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Distortion vs. frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Supply voltage rejection vs. frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Output noise vs. source resistance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Power dissipation & efficiency vs. output power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Flexiwatt25 mechanical data and package dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 TDA7384A Block and pins connection diagrams Figure 1. Block diagram Vcc1 Vcc2 470μF 100nF ST-BY NC MUTE OUT1+ OUT1- IN1 PW-GND 0.1μF OUT2+ OUT2- IN2 0.1μF PW-GND OUT3+ OUT3- IN3 PW-GND 0.1μF OUT4+ OUT4- IN4 PW-GND 0.1μF AC-GND SVR 0.47μF TAB S-GND 47μF D99AU1018MOD Pins connection N.C. P-GND4 MUTE OUT4- VCC OUT4+ OUT3- OUT3+ P-GND3 IN3 AC-GND IN4 IN2 S-GND IN1 SVR OUT1+ P-GND1 VCC OUT1- ST-BY OUT2+ 25 OUT2- 1 TAB Figure 2. P-GND2 1 Block and pins connection diagrams D94AU159B 5/14 Electrical specifications TDA7384A 2 Electrical specifications 2.1 Absolute maximum ratings Table 2. Absolute maximum ratings Symbol Parameter Value Unit Operating supply voltage 18 V VS (DC) DC supply voltage 28 V VS (pk) Peak supply voltage (t = 50ms) 50 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) 80 W Tj Junction temperature 150 °C Tstg Storage temperature – 55 to 150 °C VS IO Ptot 2.2 Thermal data Table 3. Thermal data Symbol Rth j-amb Parameter Thermal resistance junction to ambient max. Value Unit 1 °C/W 2.3 Electrical characteristics Table 4. Electrical characteristics (VS = 14.4V; f = 1KHz; Rg = 600Ω; RL = 4Ω;Tamb = 25°C; Refer to the test and application diagram (Figure 3), unless otherwise specified.) Symbol Parameter Test condition Min. Typ. Max. Unit 120 190 350 mA ±100 mV +80 mV 27 dB ±1 dB Quiescent current RL = ∞ VOS Output offset voltage Play mode dVOS During mute ON/OFF output ITU R-ARM weighted offset voltage -80 Gv Voltage gain 25 ΔGv Channel gain unbalance Iq1 Po Po max THD 6/14 Output power Max. output Distortion power(1) 26 THD = 10%; VS = 14.4V 24 27 W THD = 10%; VS = 13.2V 20 22 W VS = 14.4V 38 42 W Po = 4W 0.04 0.15 % TDA7384A Table 4. Symbol Electrical specifications Electrical characteristics (continued) (VS = 14.4V; f = 1KHz; Rg = 600Ω; RL = 4Ω;Tamb = 25°C; Refer to the test and application diagram (Figure 3), unless otherwise specified.) Parameter Test condition Min. Typ. Max. Unit "A" Weighted 50 70 μV Bw = 20Hz to 20KHz 70 100 μV eNo Output noise SVR Supply voltage rejection f = 100Hz; Vr = 1Vrms 50 65 dB fch High cut-off frequency Po = 0.5W 100 200 KHz Ri Input Impedance 70 100 KΩ f = 1KHz; Po = 4W 60 70 dB CT Cross talk f = 10KHz; Po = 4W 50 60 dB ISB St-By current consumption VSt-By = 0V 20 μA Ipin4 St-By pin current VSt-By = 1.2 to 2.6V ±1 μA VSB out St-By OUT threshold voltage (Amp: ON) VSB IN St-By IN threshold voltage (Amp: OFF) Mute attenuation POref = 4W AM 3.5 V 1.5 80 VM out Mute OUT threshold voltage (Amp: Play) VM in Mute IN threshold voltage (Amp: Mute) VAM in VS automute threshold (Amp: Mute); Att ≥ 80dB; POref = 4W (Amp: Play); Att < 0.1dB; PO = 0.5W Ipin22 Muting pin current VMUTE = 1.2V (Source current) 90 dB 3.5 5 V V 1.5 V 7.6 6.5 8.5 V V 11 20 μA 1. Saturated square wave output. Figure 3. Standard test and application circuit C8 0.1μF C7 2200μF Vcc1-2 Vcc3-4 6 R1 20 4 ST-BY 10K R2 9 C9 1μF 8 47K C10 1μF 5 C1 3 0.1μF 12 IN2 17 C2 0.1μF OUT3 18 IN3 19 15 C3 0.1μF 21 IN4 14 C4 0.1μF OUT2 2 11 IN1 OUT1 7 22 MUTE S-GND 23 16 C5 0.47μF OUT4 24 13 10 SVR C6 47μF 25 N.C. 1 TAB D95AU335C 7/14 Electrical specifications 2.4 P.C.B. and component layout Referred to Figure 3: Standard test and application circuit. 8/14 Figure 4. Components and top copper layer Figure 5. Bottom copper layer TDA7384A TDA7384A Electrical specifications 2.5 Electrical characteristic curves Figure 6. Quiescent current vs. supply voltage Figure 7. Quiescent current vs. supply current Figure 8. Output power vs. supply voltage (4Ω) Figure 9. Distortion vs. output power Figure 10. Distortion vs. frequency Figure 11. Supply voltage rejection vs. frequency 9/14 Electrical specifications TDA7384A Figure 12. Output noise vs. source resistance Figure 13. Power dissipation & efficiency vs. output power 10/14 TDA7384A 3 Application hints Application hints Referred to the circuit of Figure 3. 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 10µF. 3.2 Input stage The TDA7384A’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. 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 10µA 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 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. 11/14 Package information 4 TDA7384A Package information In order to meet environmental requirements, ST (also) offers these devices in ECOPACK® packages. ECOPACK® 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 14. Flexiwatt25 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 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 0.031 0.935 1.139 22.87 19.37 15.90 7.95 0.869 0.731 0.610 0.303 4.30 4.40 0.145 0.142 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 Flexiwatt25 (vertical) 5˚ (T p.) 3˚ (Typ.) 20˚ (Typ.) 45˚ (Typ.) (1): dam-bar protusion not included (2): molding protusion included V C B V H H1 V3 A H2 O H3 R3 L4 R4 V1 R2 L2 N L3 R L L1 V1 V2 R2 D R1 L5 Pin 1 R1 R1 E G G1 F FLEX25ME M M1 7034862 12/14 TDA7384A 5 Revision history Revision history Table 5. Document revision history Date Revision Changes 5-Dec-2001 1 Initial release. 11-Dec-2007 2 Updated in the Table 4 the values of the parameters Po and Po max . 13/14 TDA7384A 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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