October 2008
Rev 2
1/14
1
TDA7389A
4 x 45W quad bridge car radio amplifier
Features
■
High output power:
– 4 x 45 W / 4
Ω max.
– 4 x 28 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 (26dB)
– No external compensation
– No bootstrap capacitors
■
Clipping detector
■
Offset detector
■
Diagnostic facility for:
– Out to GND short
– Out to V
S
short
– Thermal shutdown
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
■
Output DC offset detector
■
Reversed battery
■
ESD
Description
The TDA7389A is an AB class audio power
amplifier, packaged in Flexiwatt 27 designed for
high end car radio applications.
Based on the fully complementary PNP/NPN
configuration the TDA7389A allows a rail to rail
output voltage swing with no need of bootstrap
capacitors.
Flexiwatt27
Table 1.
Device summary
Order code
Package
Packing
TDA7389A
Flexiwatt27
Tube
Contents
TDA7389A
Contents
Pin connection and block diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
TDA7389A
List of tables
List of tables
List of figures
TDA7389A
List of figures
TDA7389A
Pin connection and block diagrams
1
Pin connection and block diagrams
Figure 1.
Block diagram
Figure 2.
Pin connection (top view)
IN1
MUTE
ST-BY
IN2
OUT1+
OUT1-
OUT2+
OUT2-
PW-GND
IN3
IN4
OUT3+
OUT3-
OUT4+
OUT4-
PW-GND
PW-GND
PW-GND
D05AU1613
AC-GND
SVR
TAB
S-GND
Vcc1
Vcc2
CD
OFFSET
DETECTOR
FLEX27_O
OFF.DET
TAB
TAB
1
27
P-GND2
OUT2-
ST-BY
OUT2+
V
CC
OUT1-
P-GND1
OUT1+
SVR
IN1
IN2
S-GND
IN4
IN3
AC-GND
OUT3+
P-GND3
OUT3-
V
CC
OUT4+
MUTE
OUT4-
P-GND4
CD
Electrical specifications
TDA7389A
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 = 50ms)
50
V
I
O
Output peak current:
Repetitive (duty cycle 10% at f = 10Hz)
Non repetitive (t = 100
μs)
4.5
5.5
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
(V
S
= 14.4V; f = 1KHz; R
g
= 600
Ω; R
L
= 4
Ω; T
amb
= 25°C; Refer to the test and application
diagram (
), unless otherwise specified.)
Symbol
Parameter
Test condition
Min.
Typ.
Max.
Unit
I
q1
Quiescent current
R
L
=
∞
150
350
mA
V
OS
Output offset voltage
Play Mode
±80
mV
dV
OS
During mute on/off output
offset voltagef
ITU R-ARM weighted
-10
10
mV
During standby on/off output
offset voltage
-50
50
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
26
28
W
P
o max
Max.output power
(1)
V
S
= 14.4V
41
45
W
TDA7389A
Electrical specifications
THD
Distortion
P
o
= 4W
0.04
0.10
%
e
No
Output noise
"A" Weighted
50
70
μV
Bw = 20 Hz to 20 kHz
70
100
μV
SVR
Supply voltage rejection
f = 100Hz; V
r
= 1V
rms
50
75
dB
f
ch
High cut-off frequency
P
o
= 0.5W
100
200
KHz
R
i
Input Impedance
70
100
150
K
Ω
C
T
Cross talk
f = 1 kHz; P
o
= 4W
60
75
dB
f = 10 kHz; P
o
= 4W
60
dB
I
SB
Standby current
consumption
V
St-by
= 1.2V
50
μA
V
St-by
= 0V
25
I
pin4
Standby pin current
V
St-by
= 1.2 to 2.6V
±1
μA
V
SB out
Standby Out threshold
voltage
(Amp: On)
2.6
V
V
SB IN
Standby In threshold voltage (Amp: Off)
1.2
V
A
M
Mute attenuation
P
Oref
= 4 W
80
90
dB
V
M out
Mute Out threshold voltage
(Amp: play)
2.6
V
V
M in
Mute In threshold voltage
(Amp: mute)
1.2
V
V
AM in
V
S
automute threshold
(Amp: mute); Att
≥ 80 dB;
P
Oref
= 4
Ω
(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)
5
11
20
μA
V
MUTE
= 2.6 V
-5
-
-20
Offset detector
OD
LK
OD leakage current
1
µA
V
off
Detected diff. output offset
V
St-by
=5 V
1.5
±2
2.5
V
V
Pin2_Fw27
Pin2_Fw27 voltage
for Detection = True
I
pin2
= 1 mA
V
St-by
=5V; |V
off
| > 2.5 V
0.2
0.4
V
Clipping detector
CD
LK
Clip det high leakage current CD Off
1
μA
CD
SAT
Clip det sat voltage
DC On; I
CD
= 1 mA
0.2
0.4
V
CD
THD
Clip det THD level
P
o
> 16 W
2
%
1.
Saturated square wave output.
Table 4.
Electrical characteristics (continued)
(V
S
= 14.4V; f = 1KHz; R
g
= 600
Ω; R
L
= 4
Ω; T
amb
= 25°C; Refer to the test and application
diagram (
Figure 14
), unless otherwise specified.)
Symbol
Parameter
Test condition
Min.
Typ.
Max.
Unit
Electrical specifications
TDA7389A
2.4
Electrical characteristic curves
Figure 3.
Quiescent current vs. supply
voltage
Figure 4.
Quiescent output voltage vs.
supply voltage
Figure 5.
Output power vs. supply voltage
Figure 6.
Maximum output power vs. supply
voltage
Figure 7.
Distortion vs. output power
Figure 8.
Distortion vs. frequency
120
130
140
150
160
170
180
8
10
12
14
16
18
V
S
(V)
I
d
(mA)
V
in
= 0
R
L
= 4
Ω
AC00483
3
4
5
6
7
8
9
10
8
9
10
11
12
13
14
15
16
17
18
V
s
(V)
Vo (V)
V
i
= 0
R
L
= 4
Ω
AC00484
5
10
15
20
25
30
35
40
45
50
8
9
10
11
12
13
14
15
16
17
18
Vs (V)
P
o
(W)
R
L
= 4
Ω
f = 1 KHz
THD = 10%
THD = 1%
AC00485
10
15
20
25
30
35
40
45
50
55
60
65
70
8
9
10
11
12
13
14
15
16
17
18
V
s
(V)
P
o
(W)
R
L
= 4
Ω
f = 1 KHz
square-wave output
AC00486
0.01
0.1
1
10
0.1
1
10
100
P
o
(W)
THD (%)
V
s
= 14.4V
R
L
= 4
Ω
f = 10 KHz
f = 1 KHz
AC00487
0.01
0.1
1
10
10
10
2
10
3
10
4
10
5
f (Hz)
THD (%)
V
s
= 14.4V
R
L
= 4
Ω
P
o
= 4W
AC00488
TDA7389A
Electrical specifications
Figure 9.
Supply voltage rejection vs.
frequency
Figure 10.
Crosstalk vs. frequency
Figure 11.
Output noise vs. source resistance
Figure 12.
Power dissipation and efficiency
vs. output power
Figure 13.
ITU R-ARM frequency response,
weighting filter for transient pop
20
30
40
50
60
70
80
90
100
10
10
2
10
3
10
4
10
5
f (Hz)
SVR (dB)
AC00489
R
g
= 600
Ω
V
ripple
= 1 Vrms
30
40
50
60
70
80
90
100
10
10
2
10
3
10
4
10
5
f (Hz)
SVR (dB)
R
L
= 4
Ω
P
o
= 4W
R
g
= 600
Ω
AC00490
0
20
40
60
80
100
120
140
160
180
1
10
10
2
10
3
10
4
10
5
R
g
(
Ω)
E
n
(µV)
V
s
= 14.4V
R
L
= 4
Ω
22-22K Hz lin
"A" wgtd
AC00491
0
10
20
30
40
50
60
70
80
0
2
4
6
8
10
12
14
16
18
20
22
24
P
o
(W)
P
diss
(W)
0
10
20
30
40
50
60
70
80
V
s
= 13.2V
R
L
= 4 x 4
Ω
f = 1 KHz
η (%)
P
diss
η
AC00492
Output attenuation (dB)
-50
-40
-30
-20
-10
0
10
10
Hz
AC00343
10
2
10
3
10
4
10
5
Electrical specifications
TDA7389A
2.5
Test and application circuit
Figure 14.
Test and application circuit
IN1
0.1
μF
C9
1
μF
IN2
C2 0.1
μF
OUT1
OUT2
IN3
C3 0.1
μF
IN4
C4 0.1
μF
OUT3
OUT4
D05AU1614A
C5
0.47
μF
C6
47
μF
SVR
TAB
Vcc1-2
Vcc3-4
C8
0.1
μF
C7
2200
μF
C10
1
μF
ST-BY
R1
10K
R2
47K
MUTE
C1
15
16
13
12
23
5
14
S-GND
17
11
26
1, 27
CD OUT
7
21
10
9
8
6
3
4
18
19
20
22
25
24
2
OFFSET
DETECTOR OUT
47K
R4
V
47K
R3
V
CD
TDA7389A
Application hints
3 Application
hints
Ref. to the circuit of
.
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 22µF, 47µF can
be used to optimize pop performances.
3.2 Input
stage
The TDA7389A’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.
The input capacitors should be 1/4 of the capacitor connected to AC-GND pin for optimum
pop performances.
3.3 Standby
and
muting
Standby and muting facilities are both 3.3 V CMOS-compatible. If unused, a straight
connection to V
s
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 23, the maximum allowable
muting-series resistance (R
2
) is 70 k
Ω, 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 1.2 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.
Package information
TDA7389A
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 15.
Flexiwatt27 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
25.75
26.00
26.25
1.014
1.023
1.033
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
V
5˚ (Typ.)
V1
3˚ (Typ.)
V2
20˚ (Typ.)
V3
45˚ (Typ.)
(1): dam-bar protusion not included
(2): molding protusion included
Flexiwatt27 (vertical)
H3
R4
G
V
V
G1
L2
H1
H
F
M1
L
FLEX27ME
V3
O
L3
L4
H2
R3
N
V2
R
R2
R2
C
B
L1
M
R1
L5
R1
R1
E
D
A
V1
V1
7139011
Pin 1
TDA7389A
Revision history
5 Revision
history
Table 5.
Document revision history
Date
Revision
Changes
14-Nov-2007
1
Initial release.
20-Oct-2008
2
Table 3: Thermal data on page 6
.
TDA7389A
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Document Outline
- Table 1. Device summary
- 1 Pin connection and block diagrams
- 2 Electrical specifications
- 2.1 Absolute maximum ratings
- 2.2 Thermal data
- 2.3 Electrical characteristics
- 2.4 Electrical characteristic curves
- Figure 3. Quiescent current vs. supply voltage
- Figure 4. Quiescent output voltage vs. supply voltage
- Figure 5. Output power vs. supply voltage
- Figure 6. Maximum output power vs. supply voltage
- Figure 7. Distortion vs. output power
- Figure 8. Distortion vs. frequency
- Figure 9. Supply voltage rejection vs. frequency
- Figure 10. Crosstalk vs. frequency
- Figure 11. Output noise vs. source resistance
- Figure 12. Power dissipation and efficiency vs. output power
- Figure 13. ITU R-ARM frequency response, weighting filter for transient pop
- 2.5 Test and application circuit
- 3 Application hints
- 4 Package information
- 5 Revision history
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