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 (26 dB)
– No external compensation
– No bootstrap capacitors
■ Clipping detector
■ Diagnostic facility for:
– Out to GND short
– Out to V
– Thermal shutdown
short
S
TDA7389
Flexiwatt 25
■ Load dump voltage
■ Fortuitous open GND
■ Reversed battery
■ ESD
Description
Protections
■ Output short circuit to GND, to V
load
■ Very inductive loads
■ Overrating chip temperature with soft thermal
limiter
Table 1. Device summary
Order code Package Packing
TDA7389 Flexiwatt 25 Tube
October 2008 Rev 2 1/14
, across the
S
The TDA7389 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 TDA7389 allows a rail to rail
output voltage swing with no need of bootstrap
capacitors.
www.st.com
1
Contents TDA7389
Contents
1 Pin connection and block diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2 Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.1 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.2 Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.3 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.4 Electrical characteristic curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.5 Test and application circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
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
2/14
TDA7389 List of tables
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
3/14
List of figures TDA7389
List of figures
Figure 1. Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Figure 2. Pin connection (top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Figure 3. Quiescent current vs. supply voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Figure 4. Quiescent output voltage vs. supply voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Figure 5. Output power vs. supply voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Figure 6. Maximum output power vs. supply voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Figure 7. Distortion vs. output power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Figure 8. Distortion vs. frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Figure 9. Supply voltage rejection vs. frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Figure 10. Crosstalk vs. frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Figure 11. Output noise vs. source resistance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Figure 12. Power dissipation & efficiency vs. output power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Figure 13. ITU R-ARM frequency response, weighting filter for transient pop. . . . . . . . . . . . . . . . . . . . 9
Figure 14. Test and application circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Figure 15. Flexiwatt25 mechanical data and package dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4/14
TDA7389 Pin connection and block diagrams
1 Pin connection and block diagrams
Figure 1. Block diagram
Vcc1 Vcc2
ST-BY
MUTE
IN1
IN2
IN3
IN4
AC-GND SVR TAB S-GND
CD
OUT1+
OUT1-
PW-GND
OUT2+
OUT2-
PW-GND
OUT3+
OUT3-
PW-GND
OUT4+
OUT4-
PW-GND
Figure 2. Pin connection (top view)
1 25
CC
TAB
OUT2-
P-GND2
ST-BY
OUT2+
V
OUT1-
P-GND1
SVR
OUT1+
IN1
IN2
IN4
S-GND
IN3
OUT3+
AC-GND
OUT3-
P-GND3
D99AU1018A
CC
V
OUT4+
D94AU159mod
MUTE
OUT4-
P-GND4
CD
5/14
Electrical specifications TDA7389
2 Electrical specifications
2.1 Absolute maximum ratings
Table 2. Absolute maximum ratings
Symbol Parameter Value Unit
V
S (DC)
V
S (pk)
V
S
Operating supply voltage 18 V
DC supply voltage 28 V
Peak supply voltage (t = 50 ms) 50 V
Output peak current:
I
O
Repetitive (duty cycle 10 % at f = 10 Hz)
Non repetitive (t = 100 μs)
P
tot
T
j
T
stg
Power dissipation, (T
case
Junction temperature 150 °C
Storage temperature – 55 to 150 °C
2.2 Thermal data
Table 3. Thermal data
Symbol Parameter Value Unit
R
th j-case
Thermal resistance junction to case max. 1 °C/W
2.3 Electrical characteristics
4.5
5.5
= 70 °C) 80 W
A
Table 4. Electrical characteristics
(V
= 14.4V; f = 1KHz; Rg = 600Ω; RL = 4Ω; T
S
= 25°C; Refer to the test and application
amb
diagram (Figure 14), unless otherwise specified.)
Symbol Parameter Test condition Min. Typ. Max. Unit
I
q1
V
OS
dV
G
ΔG
P
P
o max
6/14
Quiescent current RL = ∞ 150 350 mA
Output offset voltage Play mode ±80 mV
During mute on/off output
offset voltagef
OS
During standby on/off output
ITU R-ARM weighted
see Figure 13
offset voltage
Voltage gain 25 26 27 dB
v
Channel gain unbalance ±1 dB
v
Output power THD = 10 %; VS = 14.4 V 26 28 W
o
Max.output power
(1)
VS = 14.4 V 41 45 W
-10 10
-50 50
mV
TDA7389 Electrical specifications
Table 4. Electrical characteristics (continued)
(V
= 14.4V; f = 1KHz; Rg = 600Ω; RL = 4Ω; T
S
= 25°C; Refer to the test and application
amb
diagram (Figure 14), unless otherwise specified.)
Symbol Parameter Test condition Min. Typ. Max. Unit
THD Distortion P
= 4W 0.04 0.10 %
o
"A" Weighted 50 70 μV
e
No
Output noise
Bw = 20 Hz to 20 kHz 70 100 μV
SVR Supply voltage rejection f = 100 Hz; V
f
ch
R
High cut-off frequency Po = 0.5 W 100 200 KHz
Input Impedance 70 100 150 KΩ
i
f = 1 kHz; Po = 4 W 60 75 dB
I
I
V
SB out
V
SB IN
A
V
V
C
SB
pin4
M out
M in
Cross talk
T
Standby current
consumption
Standby pin current V
Standby Out threshold
voltage
f = 10 kHz; P
V
St-by
V
St-by
St-by
(Amp: ON) 2.6 V
Standby In threshold voltage (Amp: OFF) 1.2 V
Mute attenuation P
M
Oref
Mute Out threshold voltage (Amp: play) 2.6 V
Mute In threshold voltage (Amp: mute) 1.2 V
(Amp: mute); Att ≥ 80 dB;
P
V
I
AM in
pin22
VS automute threshold
Muting pin current
Oref
(Amp: Play); Att < 0.1 dB;
= 0.5 W
P
o
V
MUTE
(Source current)
V
MUTE
Clipping detector
= 1 V
r
rms
= 4 W 60 dB
o
50 75 dB
= 1.2 V 50
μA
= 0 V 25
= 1.2 to 2.6 V ±1 μA
= 4 W 80 90 dB
= 4 Ω
= 1.2 V
7.6
51120
6.5
8.5
µA
= 2.6 V -5 - -20
V
CD
CD
SAT
CD
THD
1. Saturated square wave output.
Clip det high leakage current CD Off 1 µA
LK
Clip det sat voltage DC On; ICD = 1m A 0.2 0.4 V
Clip det THD level Po > 16 W 2 %
7/14
Electrical specifications TDA7389
Vin = 0
R
L
= 4Ω
Vi = 0
R
L
= 4Ω
Vs (V)
RL = 4Ω
f = 1 KHz
THD = 10%
THD = 1%
Vs (V)
Po (W)
RL = 4Ω
f = 1 KHz
square-wave output
Po (W)
THD (%)
Vs = 14.4V
R
L
= 4Ω
f = 10 KHz
f = 1 KHz
f (Hz)
THD (%)
Vs = 14.4V
R
L
= 4Ω
P
o
= 4W
2.4 Electrical characteristic curves
Figure 3. Quiescent current vs. supply
voltage
(mA)
I
d
180
170
160
150
140
130
120
8 1012141618
V
(V)
S
AC00483
Figure 5. Output power vs. supply voltage
Po (W)
50
45
40
35
30
25
20
15
10
5
8 9 10 11 12 13 14 15 16 17 18
AC00485
Figure 4. Quiescent output voltage vs.
supply voltage
Vo (V)
10
9
8
7
6
5
4
3
8 9 10 11 12 13 14 15 16 17 18
V
(V)
s
AC00484
Figure 6. Maximum output power vs. supply
voltage
70
65
60
55
50
45
40
35
30
25
20
15
10
8 9 10 11 12 13 14 15 16 17 18
AC00486
Figure 7. Distortion vs. output power
10
1
0.1
0.01
0.1 1 10 100
8/14
AC00487
Figure 8. Distortion vs. frequency
10
1
0.1
0.01
10 10
2
3
10
10
4
10
AC00488
5
TDA7389 Electrical specifications
9
f (Hz)
SVR (dB)
RL = 4Ω
P
o
= 4W
R
g
= 600Ω
0
Rg (Ω)
En (µV)
Vs = 14.4V
R
L
= 4Ω
22-22K Hz lin
"A" wgtd
Vs = 13.2V
R
L
= 4 x 4Ω
f = 1 KHz
P
diss
η
2
Figure 9. Supply voltage rejection vs.
frequency
SVR (dB)
100
90
80
70
60
50
40
Rg = 600Ω
V
= 1 Vrms
ripple
30
20
10 10
2
10
f (Hz)
3
4
10
10
AC0048
Figure 11. Output noise vs. source resistance
180
160
140
120
100
80
60
40
20
0
11010
2
3
10
4
10
10
AC00491
Figure 13. ITU R-ARM frequency response,
weighting filter for transient pop
Output attenuation (dB)
10
Figure 10. Crosstalk vs. frequency
100
90
80
70
60
50
40
30
5
10 10
2
3
10
4
10
Figure 12. Power dissipation & efficiency vs.
output power
(W)
P
diss
80
70
60
50
40
30
20
10
0
5
024681012141618202224
(W)
P
o
η (%)
10
AC0049
AC0049
5
80
70
60
50
40
30
20
10
0
-10
-20
-30
-40
-50
0
10
2
10
3
10
Hz
4
10
AC00343
5
10
9/14
Electrical specifications TDA7389
2.5 Test and application circuit
Figure 14. Test and application circuit
ST-BY
MUTE
IN1
IN2
IN3
IN4
R1
10K
R2
47K
C1
0.1μF
C2 0.1μF
C3 0.1μF
C4 0.1μF
C9
1μF
C10
1μF
S-GND
C8
0.1μF
4
22
11
12
15
14
13
16 10 25 1
C5
0.47μF
C7
2200μF
Vcc1-2
SVR TAB
C6
47μF
CD OUT
Vcc3-4
620
17
18
19
21
24
23
CD
R3
47K
9
8
7
5
2
3
D95AU335C
V
OUT1
OUT2
OUT3
OUT4
10/14
TDA7389 Application hints
3 Application hints
Ref. to the circuit of Figure 14.
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 TDA7389’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 3.3V CMOS-compatible. If unused, a straight
connection to V
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
reasonably small (about 1µF).
If R
is higher than recommended, the involved risk will be that the voltage at pin 23 may rise
2
to above the 1.2V threshold voltage and the device will consequently fail to turn OFF when
the mute line is brought down.
About the standby, the time constant to be assigned in order to obtain a virtually pop-free
transition has to be slower than 2.5V/ms.
of their respective pins would be admissible.
s
) is 70 kΩ, which is sufficiently high to permit a muting capacitor
2
11/14
Package information TDA7389
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. Flexiwatt25 mechanical data and package dimensions
DIM.
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 0.9 0 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 15.9 0 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
V5˚ (Tp.)
V1 3˚ (Typ.)
V2 2 0˚ (Typ.)
V3 4 5˚ (Typ.)
(1): dam-bar protusion not included
(2): molding pr otusion includ ed
mm inch
MIN. TYP. MAX. MIN. TYP. MAX.
OUTLINE AND
MECHANICAL DATA
Flexiwatt25 (vertical)
V
B
H
V3
OL3 L4
L2
Pin 1
H3
G
H1
G1
12/14
C
V
H2
R3
R4
N
F
R2
R
L
L1
V2
R2
FLEX25ME
A
V1
V1
R1
R1 R1
L5
M
D
E
M1
7034862
TDA7389 Revision history
5 Revision history
Table 5. Document revision history
Date Revision Changes
09-Nov-2007 1 Initial release.
20-Oct-2008 2 Updated the Table 3: Thermal data on page 6.
13/14
TDA7389
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