– 2 x 40 W max./4 Ω
–2 x 35 W/4 Ω EIAJ
–2 x 25 W/4 Ω @14.4 V, 1 kHz, 10 %
–2 x 25 W/2 Ω @14.4 V, 1 kHz, 10 %
■ 2 Ω driving
■ Differential inputs
■ Minimum external components count
■ Internally fixed gain (26 dB)
■ Mute function (CMOS compatible)
■ Automute at minimum supply voltage detection
■ Standby function
■ No audible pop during mute and standby
operations
■ Clipping detector with programmable distortion
threshold
■ Protections:
– Short circuit (out to ground, out to supply
voltage, across the load)
– Overrating chip temperature with soft
thermal limiter
– Load dump voltage
– Fortuitous open ground
– Loudspeaker DC current
–ESD
Table 1.Device summary
TDA7376PD
PowerSO36 (Slug up)
Description
The TDA7376PD is a new technology dual bridge
audio amplifier in PowerSO36 package designed
for car radio applications.
Thanks to the fully complementary PNP/NPN
output stage configuration the TDA7376PD
delivers a rail-to-rail voltage swing with no need of
bootstrap capacitors.
Differential input pairs, that will accept either
single ended or differential input signals,
guarantee high noise immunity making the device
suitable for both car radio and car boosters
applications.
The audio mute control, that attenuates the output
signal of the audio amplifiers, suppresses pop
on - off transients and cuts any noises coming
from previous stages. The standby control, that
de-biases the amplifiers, reduces the cost of the
power switch. The on-board programmable
distortion detector allows compression facility
whenever the amplifier is overdriven, so limiting
the distortion at any levels inside the presettable
range.
The TDA7376PD is equipped with a programmable clipping distortion detector circuitry that
allows to signal out the output stage saturation by providing a current sinking into an open
collector output (D
) when the total harmonic distortion of the output signal reaches the
DOUT
preset level. The desired threshold is fixed through an external divider that produces a
proper voltage level across the THD set pin. Figure 3 shows the THD detection threshold
versus the THD set voltage. Since it is essential that the THD set voltage be proportional to
the supply voltage, Figure 4 shows its value as a fraction of V
. The actual voltage can be
CC
computed by multiplying the fraction corresponding to the desired THD threshold by the
application’s supply voltage.
Doc ID 10260 Rev 37/14
Electrical specificationsTDA7376PD
(V)
(V)
2.4 Electrical characteristics curves
VS = 14.4V
R
= 4
L
f = 1KHz
Po ( W)
f= 1 KHz
THD= 1 %
voltage
Ω
(THD = 1 %)
Vs
RL= 2
Ω
RL= 4
Figure 4.Quiescent current vs. supply volt-
age
RL = 4
Ω
Figure 6.Output power vs. supply voltage
(THD = 10 %)
Po ( W)
55
50
f= 1 KHz
45
THD= 10 %
40
35
30
25
Ω
20
15
10
5
8910 11 12 13 14 15 16 17 18
RL= 2
Vs
Figure 3.Clip detector threshold vs. THD set.
Figure 5.Output power vs. supply voltage
45
40
35
30
25
20
15
10
5
8910 11 12 13 14 15 16 17 18
Figure 7.EIAJ power vs. supply voltageFigure 8.THD vs. frequency
Ω
RL= 4
Ω
f = 1KHz
= 2.5Vrms
V
i
RL = 3.2
Ω
RL = 4
Ω
8/14Doc ID 10260 Rev 3
VS = 14.4V
= 4
R
Ω
L
= 12W
P
O
f (Hz)
TDA7376PDElectrical specifications
Figure 9.THD vs. output power (RL = 4 Ω)Figure 10. THD vs. output power (RL = 24 Ω)
10
1
TH D (%)
Vs = 14.4 V
R L = 4
Ω
f= 10 KHz
10
1
THD (%)
Vs= 14.4 V
R L = 2
Ω
f = 10 KHz
0.1
f = 1 KHz
0.01
0.1110
Po ( W)
Figure 11. Dissipated power and efficiency vs.
0.1
0.01
0.1110
f= 1 KHz
Po ( W)
Figure 12. SVR vs. frequency
output power
VS = 14.4V
R
= 4
Ω
L
f = 1KHz
VS = 14.4V
= 4
R
Ω
L
= 1Vrms
V
r
Ri = 0
Ri = 600
f (Hz)
Ω
Ω
Figure 13. CMRR vs. frequencyFigure 14. Crosstalk vs. frequency
VS = 14.4V
= 4
R
Ω
L
= 1Vrms
V
i
f (Hz)
Doc ID 10260 Rev 39/14
VS = 14.4V
= 4
R
Ω
L
= 1W
P
O
= 0
R
L
f (Hz)
Electrical specificationsTDA7376PD
2.5 Test and application circuits
Figure 15. Differential inputs test and application circuit
Figure 16. Single ended inputs test and application circuit
10/14Doc ID 10260 Rev 3
TDA7376PDElectrical specifications
Figure 17. Application board reference circuit
Doc ID 10260 Rev 311/14
Package informationTDA7376PD
3 Package information
In order to meet environmental requirements, ST offers these devices in different grades of
ECOPACK
®
packages, depending on their level of environmental compliance. ECOPACK
®
specifications, grade definitions and product status are available at: www.st.com.
ECOPACK
®
is an ST trademark.
Figure 18. PowerSO36 (slug up) mechanical data and package dimensions
(1) “D and E1” do not include mold flash or protusions.
Mold flash or protusions shall not exceed 0.15mm (0.006”).
(2) No intrusion allowed inwards the leads.
mminch
MIN. TYP. MAX. MIN. TYP. MAX.
-0.040
0.0012--0.0016
OUTLINE AND
MECHANICAL DATA
PowerSO36 (SLUG UP)
12/14Doc ID 10260 Rev 3
7183931 G
TDA7376PDRevision history
4 Revision history
Table 5.Document revision history
DateRevisionChanges
13-Dec-20031Initial release.
16-Apr-20042Corrected package drawing.
11-Dec-20093
Document reformatted.
Updated Section 3: Package information on page 12.
Doc ID 10260 Rev 313/14
TDA7376PD
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