Page 1
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
load
■ Very inductive loads
■ Overrating chip temperature with soft thermal
limiter
Table 1. Device summary
, across the
S
TDA7386
Flexiwatt25
■ 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.
Order code Package Packing
TDA7386 Flexiwatt25 Tube
November 2008 Rev 4 1/14
www.st.com
1
Page 2
Contents TDA7386
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
2/14
Page 3
TDA7386 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
Page 4
List of figures TDA7386
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
4/14
Page 5
TDA7386 Block and pin connection diagrams
1 Block and pin connection diagrams
Figure 1. Block diagram
Vcc1 Vcc2
ST-BY
MUTE
IN1
0.1µF
IN2
0.1µF
IN3
0.1µF
IN4
0.1µF
AC-GND
0.47µF 47µF
SVR TAB S-GND
Figure 2. Pin connection (top view)
100nF2200µF
N.C.
OUT1+
OUT1-
PW-GND
OUT2+
OUT2-
PW-GND
OUT3+
OUT3-
PW-GND
OUT4+
OUT4-
PW-GND
D99AU1018A
1 25
TAB
OUT2-
P-GND2
ST-BY
OUT2+
V
CC
OUT1-
P-GND1
SVR
OUT1+
IN1
IN2
IN4
S-GND
IN3
OUT3+
AC-GND
OUT3-
P-GND3
CC
V
MUTE
OUT4+
D94AU159B
OUT4-
P-GND4
5/14
N.C.
Page 6
Electrical specifications TDA7386
2 Electrical specifications
2.1 Absolute maximum ratings
Table 2. Absolute maximum ratings
Symbol Parameter Value Unit
V
V
CC (DC)
V
CC (pk)
CC
Operating supply voltage 18 V
DC supply voltage 28 V
Peak supply voltage (t = 50ms) 50 V
Output peak current:
I
O
Repetitive (Duty Cycle 10% at f = 10Hz)
Non Repetitive (t = 100μs)
Power dissipation, (T
case
Operating temperature range – 40 to 105 °C
Junction temperature 150 °C
Storage temperature – 55 to 150 °C
T
T
P
amb
T
tot
j
stg
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
A
Table 4. Electrical characteristics
V
= 14.4 V; f = 1 kHz; Rg = 600 Ω; RL = 4 Ω; T
S
= 25 °C; Refer to the test and application
amb
diagram, unless otherwise specified.
Symbol Parameter Test condition Min. Typ. Max. Unit
OS
v
o
Quiescent current RL = ∞ 190 350 mA
Output offset voltage Play Mode ±80 mV
During mute on/off output
offset voltage
Voltage gain 25 26 27 dB
Channel gain unbalance ±1 dB
v
Output power
Max.output power
(1)
THD = 10%; V
THD = 0.8%; V
THD = 10%; V
VS = 14.4V 43 45 W
= 13.2V 22 24 W
S
= 13.2V 16.5 18 W
S
= 14.4V 26 28 W
S
±80 mV
I
q1
V
OS
ΔV
G
ΔG
P
P
o max
6/14
Page 7
TDA7386 Electrical specifications
Table 4. Electrical characteristics (continued)
V
= 14.4 V; f = 1 kHz; Rg = 600 Ω; RL = 4 Ω; T
S
= 25 °C; Refer to the test and application
amb
diagram, unless otherwise specified.
Symbol Parameter Test condition Min. Typ. Max. Unit
THD Distortion Po = 4W 0.04 0.15 %
e
No
Output noise
SVR Supply voltage rejection f = 100 Hz; V
f
ch
R
C
I
SB
I
pin4
V
SB out
V
SB IN
A
V
M out
V
M in
V
AM in
I
pin22
1. Saturated square wave output.
High cut-off frequency Po = 0.5 W 80 200 KHz
Input impedance 70 100 KΩ
i
Cross talk
T
Standby current
consumption
Standby pin current V
Standby out threshold
voltage
Standby in threshold voltage (Amp: off) 1.5 V
Mute attenuation P
M
Mute out threshold voltage (Amp: play) 3.5 V
Mute in threshold voltage (Amp: mute) 1.5 V
VS automute threshold
Muting pin current
"A" Weighted 50 70 μV
Bw = 20 Hz to 20 kHz 70 100 μV
= 1V
r
rms
50 75 dB
f = 1 kHz; Po = 4 W 60 70 dB
f = 10 kHz; Po = 4W 60 dB
V
= 1.5 50 μA
St-by
= 0 V 20 μA
V
St-by
= 1.5 to 3.5 V ±1 μA
St-by
(Amp: on) 3.5 V
= 4W 80 90 dB
Oref
(Amp: mute); Att ≥ 80dB; P
(Amp: play); Att < 0.1dB; PO = 0.5
= 1.5V (Source current) 5 11 20 μA
V
MUTE
= 3.5V -5 - 20 μA
V
MUTE
Oref
= 4
Ω
Ω
7.6
6.5
8.5
V
V
Figure 3. Standard test and application circuit
C8
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
0.1μFC72200μF
4
22
11
12
15
14
13
C5
0.47μF
Vcc1-2
Vcc3-4
620
16 10 25 1
SVR TAB
C6
47μF
N.C.
7/14
9
8
7
5
2
3
17
18
19
21
24
23
D95AU335C
OUT1
OUT2
OUT3
OUT4
Page 8
Electrical specifications TDA7386
2.4 PCB and component layout
Referred to the circuit of Figure 3.
Figure 4. Components and top copper layer
Figure 5. Bottom copper layer
8/14
Page 9
TDA7386 Electrical specifications
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
9/14
Page 10
Electrical specifications TDA7386
Figure 12. Supply voltage rejection vs.
Figure 13. Crosstalk vs. frequency
frequency
Figure 14. Output noise vs. source resistance Figure 15. Power dissipation and efficiency vs.
output power
10/14
Page 11
TDA7386 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 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
capacitor reasonably small (about 1µF).
If R
is higher than recommended, the involved risk will be that the voltage at pin 22 may rise
2
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.
) is 70 KΩ, which is sufficiently high to permit a muting
2
11/14
Page 12
Package information TDA7386
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
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 0.90 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
V5˚ (Tp.)
V1 3˚ (Typ.)
V2 20˚ (Typ.)
V3 45˚ (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
G
H1
H3
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
Page 13
TDA7386 Revision history
5 Revision history
Table 5. Document revision history
Date Revision Changes
24-Nov-2001 1 Initial release.
Document reformatted.
20-Dec-2007 2
29-Oct-2008 3 Updated the Table 3: Thermal data on page 6.
19-Nov-2008 4 Update the Table 2: Absolute maximum ratings on page 6.
Modified the Features on page 1.
Modified the Figure 1 and 2.
Updated the Table 4: Electrical characteristics.
13/14
Page 14
TDA7386
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