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User Manual: Datasheets TDA7384A.

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October 2008 Rev 3 1/14
1
TDA7384A
4 x 42W quad bridge car radio amplifier
Features
■High output power capability:
– 4 x 42 W / 4 Ω max.
– 4 x 27 W / 4 Ω @ 14.4 V, 1 kHz, 10 %
■Low distortion
■Low output noise
■Standby function
■Mute function
■Automute at min. supply voltage detection
■Low external component count:
– Internally fixed gain (26 dB)
– No external compensation
– No bootstrap capacitors
Protections:
■Output short circuit to GND, to V
S
, across the
load
■Very inductive loads
■Overrating chip temperature with soft thermal
limiter
■Load dump voltage
■Fortuitous open GND
■Reversed battery
■ESD
Description
The TDA7384A is an AB class audio power
amplifier, packaged in Flexiwatt 25 and designed
for high end car radio applications.
Based on a fully complementary PNP/NPN
configuration, the TDA7384A allows a rail to rail
output voltage swing with no need of bootstrap
capacitors. The extremely reduced boundary
components allows very compact sets.
Flexiwatt25
Table 1. Device summary
Order code Package Packing
TDA7384A Flexiwatt25 Tube
www.st.com
Contents TDA7384A
2/14
Contents
1 Block and pin connection diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2 Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.1 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.2 Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.3 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.4 PCB and component layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.5 Electrical characteristic curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3 Application hints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.1 SVR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.2 Input stage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.3 Standby and muting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4 Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
5 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
TDA7384A List of tables
3/14
List of tables
Table 1. Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Table 2. Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Table 3. Thermal data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Table 4. Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Table 5. Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
List of figures TDA7384A
4/14
List of figures
Figure 1. Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Figure 2. Pin connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Figure 3. Standard test and application circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Figure 4. Components and top copper layer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Figure 5. Bottom copper layer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Figure 6. Quiescent current vs. supply voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Figure 7. Quiescent current vs. supply current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Figure 8. Output power vs. supply voltage (4Ω). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Figure 9. Distortion vs. output power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Figure 10. Distortion vs. frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Figure 11. Supply voltage rejection vs. frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Figure 12. Output noise vs. source resistance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Figure 13. Power dissipation and efficiency vs. output power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Figure 14. Flexiwatt25 mechanical data and package dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
TDA7384A Block and pin connection diagrams
5/14
1 Block and pin connection diagrams
Figure 1. Block diagram
Figure 2. Pin connection
IN1
0.1μF
MUTE
ST-BY
IN2
0.1μF
OUT1+
OUT1-
OUT2+
OUT2-
PW-GND
IN3
0.1μF
IN4
0.1μF
OUT3+
OUT3-
OUT4+
OUT4-
PW-GND
PW-GND
PW-GND
D99AU1018MOD
AC-GND
0.47μF47μF
SVR TAB S-GND
Vcc1 Vcc2
100nF470μF
NC
D94AU159B
TAB
P-GND2
OUT2-
ST-BY
OUT2+
VCC
OUT1-
P-GND1
OUT1+
SVR
IN1
IN2
S-GND
IN4
IN3
AC-GND
OUT3+
P-GND3
OUT3-
VCC
OUT4+
MUTE
OUT4-
P-GND4
N.C.
1 25
Electrical specifications TDA7384A
6/14
2 Electrical specifications
2.1 Absolute maximum ratings
2.2 Thermal data
2.3 Electrical characteristics
Table 2. Absolute maximum ratings
Symbol Parameter Value Unit
V
S
Operating supply voltage 18 V
V
S (DC)
DC supply voltage 28 V
V
S (pk)
Peak supply voltage (t = 50 ms) 50 V
I
O
Output peak current:
Repetitive (duty cycle 10 % at f = 10 Hz)
Non repetitive (t = 100 μs)
4.5
5.5
A
A
P
tot
Power dissipation, (T
case
= 70 °C) 80 W
T
j
Junction temperature 150 °C
T
stg
Storage temperature – 55 to 150 °C
Table 3. Thermal data
Symbol Parameter Value Unit
R
th j-case
Thermal resistance junction to case max. 1 °C/W
Table 4. Electrical characteristics
(VS = 14.4 V; f = 1 kHz; Rg = 600 Ω; RL = 4 Ω;Tamb = 25 °C; Refer to the test and application
diagram (Figure 3), unless otherwise specified.)
Symbol Parameter Test condition Min. Typ. Max. Unit
I
q1
Quiescent current R
L
= ∞ 120 190 350 mA
V
OS
Output offset voltage Play mode ±100 mV
dV
OS
During mute ON/OFF output
offset voltage ITU R-ARM weighted -80 +80 mV
G
v
Voltage gain 25 26 27 dB
ΔG
v
Channel gain unbalance ±1 dB
P
o
Output power THD = 10%; V
S
= 14.4V 24 27 W
THD = 10%; V
S
= 13.2V 20 22 W
P
o max
Max. output power(1) V
S
= 14.4V 38 42 W
THD Distortion P
o
= 4W 0.04 0.15 %
TDA7384A Electrical specifications
7/14
e
No
Output noise "A" Weighted 50 70 μV
Bw = 20 Hz to 20 kHz 70 100 μV
SVR Supply voltage rejection f = 100 Hz; V
r
= 1 Vrms 50 65 dB
f
ch
High cut-off frequency P
o
= 0.5 W 100 200 KHz
R
i
Input Impedance 70 100 KΩ
C
T
Cross talk f = 1 kHz; Po = 4 W 60 70 dB
f = 10 kHz; Po = 4 W 50 60 dB
I
SB
Standby current
consumption V
St-by
= 0 V 20 µA
I
pin4
Standby pin current V
St-by
= 1.2 to 2.6 V ±1 µA
V
SB out
Standby out threshold
voltage (Amp: ON) 3.5 V
V
SB IN
Standby in threshold voltage (Amp: OFF) 1.5 V
A
M
Mute attenuation P
Oref
= 4 W 80 90 dB
V
M out
Mute out threshold voltage (Amp: Play) 3.5 V
V
M in
Mute in threshold voltage (Amp: Mute) 1.5 V
V
AM in
V
S
automute threshold
(Amp: Mute); Att ≥ 80 dB;
P
Oref
= 4 W
(Amp: Play); Att < 0.1 dB;
P
O
= 0.5 W 7.6
6.5
8.5
V
I
pin22
Muting pin current V
MUTE
= 1.2 V
(Source current) 51120µA
1. Saturated square wave output.
Table 4. Electrical characteristics (continued)
(VS = 14.4 V; f = 1 kHz; Rg = 600 Ω; RL = 4 Ω;Tamb = 25 °C; Refer to the test and application
diagram (Figure 3), unless otherwise specified.)
Symbol Parameter Test condition Min. Typ. Max. Unit
Electrical specifications TDA7384A
8/14
Figure 3. Standard test and application circuit
2.4 PCB and component layout
Referred to Figure 3: Standard test and application circuit.
Figure 4. Components and top copper layer
IN1
0.1μF
C9
1μF
IN2
C2 0.1μF
OUT1
OUT2
IN3
C3 0.1μF
IN4
C4 0.1μF
OUT3
OUT4
D95AU335C
C5
0.47μF
C6
47μF
SVR TAB
Vcc1-2 Vcc3-4
C8
0.1μF
C7
2200μF
C10
1μF
ST-BY
R1
10K
R2
47K
MUTE
C1
14
15
12
11
22
4
13
S-GND
16 10 25 1
N.C.
620
9
8
7
5
2
3
17
18
19
21
24
23
TDA7384A Electrical specifications
9/14
Figure 5. Bottom copper layer
2.5 Electrical characteristic curves
Figure 6. Quiescent current vs. supply
voltage
Figure 7. Quiescent current vs. supply
current
Electrical specifications TDA7384A
10/14
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
Figure 12. Output noise vs. source resistance
Figure 13. Power dissipation and efficiency
vs. output power
TDA7384A Application hints
11/14
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 10µf.
3.2 Input stage
The TDA7384A’s inputs are ground-compatible and can stand very high input signals
(± 8 Vpk) without any performances degradation.
If the standard value for the input capacitors (0.1 µF) is adopted, the low frequency cut-off
will amount to 16 Hz.
3.3 Standby and muting
Standby and muting facilities are both 3.3 V 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 µA normally flows out of pin 22, the maximum allowable
muting-series resistance (R
2
) is 70 kΩ, which is sufficiently high to permit a muting capacitor
reasonably small (about 1µF).
If R
2
is higher than recommended, the involved risk will be that the voltage at pin 23 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 2.5 V/ms.
Package information TDA7384A
12/14
4 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
OUTLINE AND
MECHANICAL DATA
DIM. mm inch
MIN. TYP. MAX. MIN. TYP. MAX.
A 4.45 4.50 4.65 0.175 0.177 0.183
B 1.80 1.90 2.00 0.070 0.074 0.079
C 1.40 0.055
D 0.75 0.90 1.05 0.029 0.035 0.041
E 0.37 0.39 0.42 0.014 0.015 0.016
F (1) 0.57 0.022
G 0.80 1.00 1.20 0.031 0.040 0.047
G1 23.75 24.00 24.25 0.935 0.945 0.955
H (2) 28.90 29.23 29.30 1.139 1.150 1.153
H1 17.00 0.669
H2 12.80 0.503
H3 0.80 0.031
L (2) 22.07 22.47 22.87 0.869 0.884 0.904
L1 18.57 18.97 19.37 0.731 0.747 0.762
L2 (2) 15.50 15.70 15.90 0.610 0.618 0.626
L3 7.70 7.85 7.95 0.303 0.309 0.313
L4 5 0.197
L5 3.5 0.138
M 3.70 4.00 4.30 0.145 0.157 0.169
M1 3.60 4.00 4.40 0.142 0.157 0.173
N 2.20 0.086
O 2 0.079
R 1.70 0.067
R1 0.5 0.02
R2 0.3 0.12
R3 1.25 0.049
R4 0.50 0.019
V1 3˚ (Typ.)
V5˚ (Tp.)
V2 20˚ (Typ.)
V3 45˚ (Typ.)
(2): molding protusion included
(1): dam-bar protusion not included
Flexiwatt25 (vertical)
H3
R4
G
V
G1
L2
H1
H
F
M1
L
FLEX25ME
V3
OL3 L4
H2
R3
N
V2
R
R2
R2
C
B
L1
M
R1
L5 R1 R1
E
D
A
Pin 1
V
V1
V1
7034862
TDA7384A Revision history
13/14
5 Revision history
Table 5. Document revision history
Date Revision Changes
05-Dec-2001 1 Initial release.
11-Dec-2007 2 Updated in the Ta bl e 4 the values of the parameters P
o
and P
o max
.
10-Oct-2008 3 Updated Table 3: Thermal data on page 6.
TDA7384A
14/14
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