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TDA7384A
4 x 42W quad bridge car radio amplifier
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
Flexiwatt25

ESD
Protections:

Description
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.
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 Device summary
Order code TDA7384A
Table 1.
Package Flexiwatt25
Packing Tube
December 2007
Rev 2
1/14
www.st.com 1
Contents
TDA7384A
Contents
1 2 Block and pins connection diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.1 2.2 2.3 2.4 2.5 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 P.C.B. and component layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Electrical characteristic curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3
Application hints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.1 3.2 3.3 SVR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Input stage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Stand-by and Muting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4 5
Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
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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
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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. 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 (4). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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
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TDA7384A
Block and pins connection diagrams
1
Block and pins connection diagrams
Figure 1. Block diagram
Vcc1 Vcc2 470F ST-BY NC 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
D99AU1018MOD
100nF
MUTE
OUT4PW-GND TAB S-GND
Figure 2.
Pins connection
1
25
P-GND2
OUT2-
ST-BY
OUT2+
OUT1-
OUT1+
SVR
IN1
IN2
S-GND
IN4
IN3
AC-GND
OUT3+
P-GND1
P-GND3
OUT3-
TAB
MUTE
OUT4-
OUT4+
D94AU159B
P-GND4
N.C.
VCC
VCC
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Electrical specifications
TDA7384A
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 3), unless otherwise specified.)
Parameter Quiescent current Output offset voltage RL = Play mode -80 25 26 Test condition Min. 120 Typ. 190 Max. 350 100 +80 27 1 THD = 10%; VS = 14.4V THD = 10%; VS = 13.2V Max. output Distortion power(1) VS = 14.4V Po = 4W 24 20 38 27 22 42 0.04 0.15 Unit mA mV mV dB dB W W W %
Symbol Iq1 VOS dVOS Gv Gv Po Po max THD
During mute ON/OFF output ITU R-ARM weighted offset voltage Voltage gain Channel gain unbalance Output power
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TDA7384A 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 3), unless otherwise specified.)
Parameter 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 3.5 1.5 80 3.5 1.5 6.5 8.5 90 50 60 20 1 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 Test condition "A" Weighted Min. Typ. 50 Max. 70 Unit V V dB KHz K dB
Symbol 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
1. Saturated square wave output.
Figure 3.
Standard test and application circuit
C8 0.1F C7 2200F Vcc1-2 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 25 N.C. 1 TAB
D95AU335C
Vcc3-4 6 20 9 8 OUT1
4 C9 1F 22 C10 1F 11
7
5 2 3 OUT2
12
17 18 OUT3
15
19
21 24 23 OUT4
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Electrical specifications
TDA7384A
2.4
P.C.B. and component layout
Referred to Figure 3: Standard test and application circuit. Figure 4. Components and top copper layer
Figure 5.
Bottom copper layer
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TDA7384A
Electrical specifications
2.5
Figure 6.
Electrical characteristic curves
Quiescent current vs. supply voltage Figure 7. Quiescent current vs. supply current
Figure 8.
Output power vs. supply voltage (4)
Figure 9.
Distortion vs. output power
Figure 10. Distortion vs. frequency
Figure 11. Supply voltage rejection vs. frequency
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Electrical specifications
TDA7384A
Figure 12. Output noise vs. source resistance Figure 13. Power dissipation & efficiency vs. output power
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TDA7384A
Application hints
3
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 10F.
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 (0.1F) 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 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 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.
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Package information
TDA7384A
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 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 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
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TDA7384A
Revision history
5
Revision history
Table 5.
Date 5-Dec-2001 11-Dec-2007
Document revision history
Revision 1 2 Initial release. Updated in the Table 4 the values of the parameters Po and Po max . Changes
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TDA7384A
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