November 2008 Rev 4 1/14
1
TDA7386
4 x 45 W quad bridge car radio amplifier
Features
■High output power capability:
■4 x 45W/4Ω max.
■4 x 28W/4Ω @ 14.4V, 1KHz, 10%
■4 x 24W/4Ω @ 13.2V, 1KHz, 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
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 TDA7386 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 TDA7386 allows a rail to rail
output voltage swing with no need of bootstrap
capacitors. The extremely reduced boundary
components count allows very compact sets.
Flexiwatt25
Table 1. Device summary
Order code Package Packing
TDA7386 Flexiwatt25 Tube
www.st.com
Contents TDA7386
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 characteristics 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
TDA7386 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 TDA7386
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List of figures
Figure 1. Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Figure 2. Pin connection (top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Figure 3. Standard test and application circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Figure 4. Components and top copper layer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Figure 5. Bottom copper layer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Figure 6. Quiescent current vs. supply voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Figure 7. Quiescent output voltage vs. supply voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Figure 8. Output power vs. supply voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Figure 9. Max. output power vs. supply voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Figure 10. Distortion vs. output power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Figure 11. Distortion vs. frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Figure 12. Supply voltage rejection vs. frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Figure 13. Crosstalk vs. frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Figure 14. Output noise vs. source resistance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Figure 15. Power dissipation and efficiency vs. output power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Figure 16. Flexiwatt25 mechanical data and package dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
TDA7386 Block and pin connection diagrams
5/14
1 Block and pin connection diagrams
Figure 1. Block diagram
Figure 2. Pin connection (top view)
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
D99AU1018A
AC-GND
0.47µF 47µF
SVR TAB S-GND
Vcc1 Vcc2
100nF2200µF
N.C.
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 TDA7386
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
CC
Operating supply voltage 18 V
V
CC (DC)
DC supply voltage 28 V
V
CC (pk)
Peak supply voltage (t = 50ms) 50 V
I
O
Output peak current:
Repetitive (Duty Cycle 10% at f = 10Hz)
Non Repetitive (t = 100μs)
4.5
5.5
A
A
P
tot
Power dissipation, (T
case
= 70°C) 80 W
Tamb Operating temperature range – 40 to 105 °C
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
= 14.4 V; f = 1 kHz; 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
= ∞ 190 350 mA
V
OS
Output offset voltage Play Mode ±80 mV
ΔV
OS
During mute on/off output
offset voltage ±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
= 13.2V 22 24 W
THD = 0.8%; V
S
= 13.2V 16.5 18 W
THD = 10%; V
S
= 14.4V 26 28 W
P
o max
Max.output power (1) V
S
= 14.4V 43 45 W
TDA7386 Electrical specifications
7/14
Figure 3. Standard test and application circuit
THD Distortion P
o
= 4W 0.04 0.15 %
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
= 1V
rms
50 75 dB
f
ch
High cut-off frequency P
o
= 0.5 W 80 200 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 = 4W 60 dB
I
SB
Standby current
consumption
V
St-by
= 1.5 50 μA
V
St-by
= 0 V 20 μA
I
pin4
Standby pin current V
St-by
= 1.5 to 3.5 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
= 4W 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
≥
80dB; P
Oref
= 4
Ω
(Amp: play); Att < 0.1dB; P
O
= 0.5
Ω
7.6
6.5
8.5
V
V
I
pin22
Muting pin current V
MUTE
= 1.5V (Source current) 5 11 20 μA
V
MUTE
= 3.5V -5 - 20 μA
1. Saturated square wave output.
Table 4. Electrical characteristics (continued)
V
S
= 14.4 V; f = 1 kHz; 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
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
TDA7386 Electrical specifications
9/14
2.5 Electrical characteristics curves
Figure 6. Quiescent current vs. supply voltage Figure 7. Quiescent output voltage vs. supply
voltage
Figure 8. Output power vs. supply voltage Figure 9. Max. output power vs. supply voltage
Figure 10. Distortion vs. output power Figure 11. Distortion vs. frequency
Electrical specifications TDA7386
10/14
Figure 12. Supply voltage rejection vs.
frequency
Figure 13. Crosstalk vs. frequency
Figure 14. Output noise vs. source resistance Figure 15. Power dissipation and efficiency vs.
output power
TDA7386 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 TDA7386’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 Standby and muting
Standby and muting facilities are both 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 22 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 2.5V/ms.
Package information TDA7386
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 16. 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
TDA7386 Revision history
13/14
5 Revision history
Table 5. Document revision history
Date Revision Changes
24-Nov-2001 1Initial release.
20-Dec-2007 2
Document reformatted.
Modified the Features on page 1.
Modified the Figure 1 and 2.
Updated the Table 4: Electrical characteristics.
29-Oct-2008 3Updated the Table 3: Thermal data on page 6.
19-Nov-2008 4Update the Table 2: Absolute maximum ratings on page 6.
TDA7386
14/14
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