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TDA7376B
2 x 35 W Power amplifier for car radio
Datasheet - production data
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
Multiwatt15
Description
The TDA7376B is a new technology dual bridge
audio amplifier in Multiwatt 15 package designed
for car radio applications. Thanks to the fully
complementary PNP/NPN output stage
configuration the TDA7376B delivers a rail-to-rail
voltage swing with no need of bootstrap
capacitors.
Features
High output power capability:
– 2 x 40 W max./ 4
– 2 x 35 W/4 EIAJ
– 2 x 25 W/4 (14.4 V, 1 kHz, 10 %)
– 2 x 25 W/ 2 (14.4 V, 1 kHz, 10 %)
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.
2 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
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 over driven, so limiting
the distortion at any levels inside the presettable
range.
Table 1. Device summary
Order code
Package
Packing
TDA7376B
Multiwatt15
Tube
September 2013
This is information on a product in full production.
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www.st.com
Contents
TDA7376B
Contents
1
Block and pin connection diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.1
Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.2
Pin connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2
Test and application circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3
Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.1
Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.2
Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.3
Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.4
Electrical characteristics curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
4
Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
5
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
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List of tables
List of tables
Table 1.
Table 2.
Table 3.
Table 4.
Table 5.
Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Thermal data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
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3
List of figures
TDA7376B
List of figures
Figure 1.
Figure 2.
Figure 3.
Figure 4.
Figure 5.
Figure 6.
Figure 7.
Figure 8.
Figure 9.
Figure 10.
Figure 11.
Figure 12.
Figure 13.
Figure 14.
Figure 15.
Figure 16.
Figure 17.
Figure 18.
Figure 19.
4/15
Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Pin connection diagram (top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Differential inputs test and application circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Single ended inputs test and application circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Application board reference circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Printed circuit board and components layout of the circuit of figure 5 . . . . . . . . . . . . . . . . . 8
Clip detector threshold vs. THD set. voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Quiescent current vs. supply voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Output power vs. supply voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Output power vs. supply voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
EIAJ power vs. supply voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
THD vs. frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
THD vs. output power (RL = 4 ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
THD vs. output power (RL = 2 ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Dissipated power & efficiency vs. output power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
SVR vs. frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
CMRR vs. frequency. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Crosstalk vs. frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Multiwatt15 (vertical) mechanical data and package dimensions . . . . . . . . . . . . . . . . . . . . 13
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Block and pin connection diagrams
1
Block and pin connection diagrams
1.1
Block diagram
Figure 1. Block diagram
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Block and pin connection diagrams
1.2
TDA7376B
Pin connection
Figure 2. Pin connection diagram (top view)
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2
Test and application circuits
Test and application circuits
Figure 3. Differential inputs test and application circuit
Figure 4. Single ended inputs test and application circuit
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Test and application circuits
TDA7376B
Figure 5. Application board reference circuit
Figure 6. Printed circuit board and components layout of the circuit of figure 5
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Electrical specifications
3
Electrical specifications
3.1
Absolute maximum ratings
Table 2. Absolute maximum ratings
Symbol
V
50
V
8
A
6
A
Power Dissipation Tcase = 85 °C
Tstg, Tj
28
Output Peak Current (repetitive f & gt; 10 Hz)
Ptot
V
Output Peak Current (not repetitive t = 100 s)
IO
18
Peak supply voltage (t = 50 ms)
Vpeak
Unit
DC supply voltage
Vs
Value
Operating supply voltage
VOP
Parameter
36
W
-40 to 150
C
-40 to 105
°C
Storage and junction
temperature(1)
Operative ambient temperature range
Tamb
1. A suitable heatsink/dissipation system should be used to keep Tj inside specified limits.
3.2
Thermal data
Table 3. Thermal data
Symbol
Parameter
Rth j-case
3.3
Thermal Resistance Junction to case
Value
Unit
1.8
°C/W
Max
Electrical characteristics
Refer to the test circuits figures 3 and 4, VS = 14.4 V; RL = 4 ; f = 1 kHz; Tamb = 25 °C,
unless otherwise specified.
Table 4. Electrical characteristics
Symbol
Parameter
Test condition
Min.
Typ.
Max.
Unit
VS
Supply voltage range
-
8
-
18
V
Id
Total quiescent drain current
RL =
-
-
200
mA
VOS
Output offset voltage
-
-
-
120
mV
PO
Output power
THD = 10%;
THD = 10%; RL = 2
23
33
25
37
-
W
W
PO max
Max. output power(1)
-
36
40
-
W
PO EIAJ
power(1)
VS = 13.7V
32
35
-
W
-
0.03
0.08
-
%
%
THD
EIAJ output
Distortion
PO = 0.5 to 10 W
PO = 0.5 to 15 W
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Electrical specifications
TDA7376B
Table 4. Electrical characteristics (continued)
Symbol
Parameter
Test condition
Min.
Typ.
Max.
Unit
-
80
70
-
dB
dB
CT
Cross talk
f = 1 kHz; Rg
f = 10 kHz; Rg
RIN
Input Impedance
differential input
Single Ended input
45
40
-
-
k
k
GV
Voltage gain
differential input
Single Ended input
25
25
26
26
27
27
dB
dB
GV
Channel gain balance
-
-
-
1
dB
EIN
Input Noise Voltage
Rg = 600 ; " A " weighted
Rg = 600 ; 22 Hz to 33 kHz
-
3
4
6
V
V
SVR
Supply Voltage Rejection
f = 100 Hz; Vr = 1 Vrms; Rg = 0;
f = 10 Hz; Vr = 1V rms; Rg = 0;
45
-
55
-
dB
dB
BW
Power bandwidth
(-3dB)
75
-
-
kHz
Common mode rejection ratio
VCM = 1 Vrms input referred
60
-
-
dB
ASB
Standby Attenuation
VSB = 1.5V; PO ref = 1W
80
90
-
dB
VSB IN
Standby In threshold
-
-
-
1.5
V
Standby Out threshold
-
3.5
-
-
V
Isb
Standby current consumption
-
-
-
100
A
AM
Mute attenuation
VM = 1.5 V; POref = 1 W
-
85
VM IN
Mute In threshold
-
-
-
1.5
V
Mute Out threshold
-
3.5
-
-
V
Mute pin current
V6 = 0 to VS,; VS max. = 18V
-
-
100
A
3.5
-
-
%
1
-
-
mA
-
-
10
A
CMRR
VSB OUT
VM OUT
I6
DDL
Distortion detection level(2)
Output low, sinked current
DDOUT
Distortion detector output dc
current
(Vpin10 = 1.5V)
Output high, leakage current
(Vpin10 = VS, @ VSmax = 18V)
dB
1. Saturated square wave output.
2. see figure 5 for THD setting.Figure 7.
The TDA7376B 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 (DDout) when the total harmonic distortion of the output signal reaches the
preset level.
The desired threshold is fixed through an external divider that produces a proper voltage
level across the THD set pin. Figure 7 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 7 shows its value as a fraction of VCC.
The actual voltage can be computed by multiplying the fraction corresponding to the desired
THD threshold by the application’s supply voltage.
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3.4
Electrical specifications
Electrical characteristics curves
Figure 7. Clip detector threshold vs. THD set.
voltage
Figure 8. Quiescent current vs. supply voltage
Figure 9. Output power vs. supply voltage
Figure 10. Output power vs. supply voltage
Figure 11. EIAJ power vs. supply voltage
Figure 12. THD vs. frequency
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Electrical specifications
TDA7376B
Figure 13. THD vs. output power (RL = 4 )
Figure 14. THD vs. output power (RL = 2 )
Figure 15. Dissipated power & efficiency vs.
output power
Figure 16. SVR vs. frequency
Figure 17. CMRR vs. frequency
Figure 18. Crosstalk vs. frequency
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4
Package information
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 19. Multiwatt15 (vertical) mechanical data and package dimensions
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Revision history
5
TDA7376B
Revision history
Table 5. Document revision history
Date
19-Aug-2000
4
Initial release.
20-Jun-2013
5
Updated Table 2: Absolute maximum ratings on page 9.
18-Sep-2013
14/15
Revision
Changes
6
Updated Disclaimer.
DocID1507 Rev 6
TDA7376B
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