This is information on a product in full production.
December 2014 DocID023014 Rev 3 1/23
TDA7391LV
40 W bridge car radio amplifier with low voltage operation
Datasheet - production data
Features
High power capability:
– 40 W/ 4 Ω max
– 45 W/ 3.2 Ω max
– 32 W/ 3.2 Ω @ V
S
= 14.4 V, f = 1 kHz,
THD = 10 %
– 26 W/ 4 Ω @ V
S
= 14.4 V, f = 1 kHz,
THD = 10%
Differential inputs (either single ended or
differential input signal is accepted)
Minimum external component count
Standby function (CMOS compatible)
Capable to operate to 6 V - ‘start-stop’ and
‘e-call’ compatibility
Protections:
– Short circuit (to GND, to V
S
, across the
load)
– Very inductive loads
– Chip over temperature
– Load dump
– Open GND
– ESD
Description
The TDA7391LV is a bridge class AB audio power
amplifier for car radio applications.
The high power capability together with the
possibility to operate either in differential input
mode or single ended input mode makes it
suitable for high end car radio equipment. The
exclusive fully complementary output stage and
the internal fixed gain configuration drop the
external component count.
The on board clipping detector allows easy
implementation of gain compression systems.
It is moreover compliant to the most recent OEM
specifications for low voltage operation ('start-
stop' battery profile during engine stop), and e-call
functions.
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Table 1. Device summary
Order code Package Packing
TDA7391LV Multiwatt 11 Tube
TDA7391LVPD
PowerSO-20 (slug-down)
Tube
TDA7391LVPDTR Tape and reel
TDA7391LVPDU
PowerSO-20 (slug-up)
Tube
TDA7391LVPDUTR Tape and reel
www.st.com
Contents TDA7391LV
2/23 DocID023014 Rev 3
Contents
1 Block diagram, test and application circuit . . . . . . . . . . . . . . . . . . . . . . 5
1.1 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.2 Test and application circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2 Pins description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3 Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.1 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.2 Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.3 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.4 Low voltage operation (‘start stop’) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.5 Electrical characteristics curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4 Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.1 Multiwatt 11 (vertical) package mechanical data . . . . . . . . . . . . . . . . . . . 16
4.2 PowerSO-20 (slug-down) package mechanical data . . . . . . . . . . . . . . . . 18
4.3 PowerSO-20 (slug-up) package mechanical data . . . . . . . . . . . . . . . . . . 20
5 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
DocID023014 Rev 3 3/23
TDA7391LV List of tables
3
List of tables
Table 1. Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Table 2. Pins function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Table 3. Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Table 4. Thermal data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Table 5. Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Table 6. Multiwatt 11 (vertical) package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Table 7. PowerSO-20 (slug-down) package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Table 8. PowerSO-20 (slug-up) package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Table 9. Document revision history. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
List of figures TDA7391LV
4/23 DocID023014 Rev 3
List of figures
Figure 1. Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Figure 2. Test and application circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Figure 3. Multiwatt 11 pins connection (top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Figure 4. PowerSO-20 pins connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Figure 5. Worts case battery cranking curve sample 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Figure 6. Worst case battery cranking curve sample 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Figure 7. Quiescent current vs. supply voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Figure 8. Output power vs. supply voltage (RL = 3.2 Ω) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Figure 9. Output power vs. supply voltage (RL = 4 Ω) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Figure 10. Output power vs. supply voltage (RL = 8 Ω) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Figure 11. Distortion vs. output power (RL = 3.2 Ω) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Figure 12. Distortion vs. frequency (RL= 3.2 Ω) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Figure 13. Distortion vs. output power (RL = 4 Ω) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Figure 14. Distortion vs. frequency (RL = 4 Ω) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Figure 15. Distortion vs. output power (RL = 8 Ω) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Figure 16. Distortion vs. frequency (RL = 8 Ω) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Figure 17. Distortion vs. output power (RL = 4 Ω, V
s = 6 V). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Figure 18. Distortion vs. frequency (RL = 4 Ω, V
s = 6 V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Figure 19. Distortion vs. output power (RL = 8 Ω, V
s = 6 V). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Figure 20. Distortion vs. frequency (RL = 8 Ω, V
s = 6 V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Figure 21. Supply voltage rejection vs. frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Figure 22. Common mode rejection vs. frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Figure 23. Total power dissipation and efficiency vs. output power (RL = 4 Ω) . . . . . . . . . . . . . . . . . . 14
Figure 24. Power dissipation vs. average output power (audio program simulation, RL = 4 Ω). . . . . . 14
Figure 25. Power dissipation vs. average output power (audio program simulation, RL = 4 Ω &
8 Ω, V
s = 6 V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Figure 26. Power dissipation vs. output power (RL = 4 Ω & 8 Ω, sine, V
s = 6 V). . . . . . . . . . . . . . . . . 15
Figure 27. Multiwatt 11 (vertical) package mechanical drawing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Figure 28. PowerSO-20 (slug-down) package mechanical drawing . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Figure 29. PowerSO-20 (slug-up) package mechanical drawing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
DocID023014 Rev 3 5/23
TDA7391LV Block diagram, test and application circuit
22
1 Block diagram, test and application circuit
1.1 Block diagram
Figure 1. Block diagram
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DocID023014 Rev 3 7/23
TDA7391LV Pins description
22
2 Pins description
Figure 3. Multiwatt 11 pins connection (top view)
Figure 4. PowerSO-20 pins connection
Table 2. Pins function
Multiwatt 11
Pin #
PowerSO-20
Pin # Name Description
1, 2 14, 15 INPUTS
The input stage is a high impedance type also capable
of operation in single ended mode with one input
capacitively coupled to the signal GND. The impedance
seen by the inverting and non inverting input pins must
be matched.
3, 9 5, 16 +V
S
Supply voltage.
417CD
The TDA7391LV is equipped with a diagnostic circuitry
able to detect the clipping in the Output Signal
(distortion = 10%).
The CD pin (open collector) gives out low level signal
during clipping.
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Pins description TDA7391LV
8/23 DocID023014 Rev 3
5, 7 2, 19 OUTPUTS
The output stage is a bridge type able to drive loads as
low as 3.2 Ω. It consists of two class AB fully
complementary PNP/NPN stages fully protected.
A rail to rail output voltage swing is achieved without
need of bootstrap capacitors.
No external compensation is necessary.
6
1, 10, 11, 20 GND Power ground.
12 S-GND Signal ground.
8 4 STANDBY
The device features a standby function which shuts
down all the internal bias supplies when the standby pin
is low. In standby mode the amplifier sinks a small
current (in the range of few μA). When the standby pin is
high the IC becomes fully operational.
10 8 SYNC
A resistor (R
2
) between pin 8 and GND set the charging
current of capacitor C3 (pin 9). The suggested values of
C3 and R2 define the correct timing in order to switch
on/off the amplifier without any pop noise.
11 9 MUTE
The pin is connected to a capacitor (C
3
) tied to GND to
set the mute/standby time.
An automatic mute during turn on/off is provided to
prevent noisy transients.
Table 2. Pins function (continued)
Multiwatt 11
Pin #
PowerSO-20
Pin # Name Description
DocID023014 Rev 3 9/23
TDA7391LV Electrical specifications
22
3 Electrical specifications
3.1 Absolute maximum ratings
3.2 Thermal data
3.3 Electrical characteristics
V
S
= 14.4 V; R
L
= 4 Ω, f = 1 kHz, T
amb
= 25 °C, unless otherwise specified.
Table 3. Absolute maximum ratings
Symbol Parameter Value Unit
V
S
DC supply voltage 28 V
V
OP
Operating supply voltage 18 V
V
PEAK
Peak supply voltage (t = 50 ms) 50 V
I
O
Output peak current repetitive (f > 10 Hz) 4.5 A
Output peak current non repetitive 6 A
P
tot
Power dissipation (T
case
= 85 °C) 43 W
T
stg
, T
j
Storage and junction temperature -40 to 150 C
Table 4. Thermal data
Symbol Parameter Multiwatt PowerSO Unit
R
th j-case
Thermal resistance junction-to-case Max. 1.8 2 °C/W
Table 5. Electrical characteristics
Symbol Parameter Test condition Min. Typ. Max. Unit
V
S
Supply voltage range - 6 - 18 V
I
q
Total quiescent current - - 60 150 mA
V
OS
Output offset voltage - - - 120 mV
I
SB
Standby current V
ST-BY
= 1.5 V - - 50 μA
I
SBin
Standby input bias current V
ST-BY
= 5 V - - 10 μA
V
SBon
Standby on threshold voltage - - - 1.5 V
V
SBoff
Standby off threshold voltage - 3.5 - - V
ATT
ST-BY
Standby attenuation - - 90 - dB
I
M in
Mute input bias current (V
MUTE
= 5 V) - - 10 μA
A
M
Mute attenuation - - 90 - dB
Electrical specifications TDA7391LV
10/23 DocID023014 Rev 3
P
O
Output power
THD = 10 % 20 26 - W
THD = 1 % - 21 - W
THD = 10 %; R
L
= 3.2 Ω-32-W
V
S
= 6 V; THD = 10 % - 4.2 - W
P
O MAX
Max. output power (1) V
S
= 14.4 V; R
L
= 3.2 Ω-45-W
V
S
= 6 V; THD = 10 % - 6 - W
THD Total harmonic distortion
- - 0.06 - %
P
O
= 0.1 to 15 W - 0.03 - %
V
S
= 6 V; P
O
= 1 W 0.05 %
V
S
= 6 V; P
O
= 3.5 W 1.5 %
G
V
Voltage gain - 29.5 30 30.5 dB
f
H
High frequency roll-off P
O
= 1 W; -3 dB 75 - - kHz
R
IN
Input Impedance
Differential 36 60 - kΩ
Single ended 30 55 - kΩ
E
IN
Input noise voltage R
g
= 0 Ω; f = 22 Hz to 22 kHz - 4 - mV
CMRR Input common mode rejection f = 1 kHz; V
IN
= 1 V
rms
-65-dB
SVR Supply voltage rejection R
g
= 0 Ω; V
r
= 1 Vrms - 60 - dB
CDL Clipping detection level - 5 10 15 %
T
sd
Absolute thermal shutdown
junction temperature - - 160 - C
1. Saturated square wave output.
Table 5. Electrical characteristics (continued)
Symbol Parameter Test condition Min. Typ. Max. Unit
DocID023014 Rev 3 11/23
TDA7391LV Electrical specifications
22
3.4 Low voltage operation (‘start stop’)
The most recent OEM specification are requiring automatic stop of car engine at traffic light,
in order to reduce emissions of polluting substances. The TDA7391LV allows a continuous
operation when battery falls down to 6/7 V during such conditions. The maximum system
power will be reduced accordingly.
Worst case battery cranking curves are shown below, indicating the shape and durations of
allowed battery transitions.
Figure 5. Worts case battery cranking curve sample 1
V1 = 12 V; V2 = 6 V; V3 = 7 V; V4 = 8 V
t1 = 2 ms; t2 = 50 ms; t3 = 5 ms; t4 = 300 ms; t5 =10 ms; t6 = 1 s; t7 = 2 ms
Figure 6. Worst case battery cranking curve sample 2
V1 = 12 V; V2 = 6 V; V3 = 7 V
t1 = 2 ms; t2 = 5 ms; t3 = 15 ms; t5 = 1 s; t6 = 50 ms
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Electrical specifications TDA7391LV
12/23 DocID023014 Rev 3
3.5 Electrical characteristics curves
Figure 7. Quiescent current vs. supply voltage Figure 8. Output power vs. supply voltage
(RL = 3.2 Ω)
Figure 9. Output power vs. supply voltage
(RL = 4 Ω)
Figure 10. Output power vs. supply voltage
(RL = 8 Ω)
Figure 11. Distortion vs. output power
(RL = 3.2 Ω)
Figure 12. Distortion vs. frequency (RL= 3.2 Ω)
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DocID023014 Rev 3 13/23
TDA7391LV Electrical specifications
22
Figure 13. Distortion vs. output power
(RL = 4 Ω)
Figure 14. Distortion vs. frequency (RL = 4 Ω)
Figure 15. Distortion vs. output power
(RL = 8 Ω)
Figure 16. Distortion vs. frequency (RL = 8 Ω)
Figure 17. Distortion vs. output power
(RL = 4 Ω, V
s = 6 V)
Figure 18. Distortion vs. frequency
(RL = 4 Ω, V
s = 6 V)
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Electrical specifications TDA7391LV
14/23 DocID023014 Rev 3
Figure 19. Distortion vs. output power
(RL = 8 Ω, V
s = 6 V)
Figure 20. Distortion vs. frequency
(RL = 8 Ω, V
s = 6 V)
Figure 21. Supply voltage rejection vs.
frequency
Figure 22. Common mode rejection vs.
frequency
Figure 23. Total power dissipation and
efficiency vs. output power (RL = 4 Ω)
Figure 24. Power dissipation vs. average output
power (audio program simulation, RL = 4 Ω)
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DocID023014 Rev 3 15/23
TDA7391LV Electrical specifications
22
Figure 25. Power dissipation vs. average output
power (audio program simulation, RL = 4 Ω &
8 Ω, V
s = 6 V)
Figure 26. Power dissipation vs. output power
(RL = 4 Ω & 8 Ω, sine, V
s = 6 V)
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Package information TDA7391LV
16/23 DocID023014 Rev 3
4 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.
4.1 Multiwatt 11 (vertical) package mechanical data
Figure 27. Multiwatt 11 (vertical) package mechanical drawing
Table 6. Multiwatt 11 (vertical) package mechanical data
Symbol
Millimeters Inches
Min. Typ. Max. Min. Typ. Max.
A 5 0.1969
B 2.65 0.1043
C 1.6 0.063
D 1 0.0394
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DocID023014 Rev 3 17/23
TDA7391LV Package information
22
E 0.49 0.55 0.0193 0.0217
F 0.88 0.95 0.0346 0.0374
G 1.45 1.7 1.95 0.0571 0.0669 0.0768
G1 16.75 17 17.25 0.6594 0.6693 0.6791
H1 19.6 0.7717
H2 20.2 0.7953
L 21.9 22.2 22.5 0.8622 0.874 0.8858
L1 21.7 22.1 22.5 0.8543 0.8701 0.8858
L2 17.4 18.1 0.685 0.7126
L3 17.25 17.5 17.75 0.6791 0.689 0.6988
L4 10.3 10.7 10.9 0.4055 0.4213 0.4291
L7 2.65 2.9 0.1043 0.1142
M 4.25 4.55 4.85 0.1673 0.1791 0.1909
M1 4.73 5.08 5.43 0.1862 0.2 0.2138
S 1.9 2.6 0.0748 0.1024
S1 1.9 2.6 0.0748 0.1024
Diam.1 3.65 3.85 0.1437 0.1516
Table 6. Multiwatt 11 (vertical) package mechanical data (continued)
Symbol
Millimeters Inches
Min. Typ. Max. Min. Typ. Max.
Package information TDA7391LV
18/23 DocID023014 Rev 3
4.2 PowerSO-20 (slug-down) package mechanical data
Figure 28. PowerSO-20 (slug-down) package mechanical drawing
Table 7. PowerSO-20 (slug-down) package mechanical data
Symbol
Millimeters Inches
Min. Typ. Max. Min. Typ. Max.
Ө0° 8° 0° 8°
Ө1 5° 10° 5° 10°
Ө20° 0°
A 3.6 0.1417
A1 0.1 0.0039
A2 3 3.15 3.3 0.1181 0.124 0.1299
A3 0.1 0.0039
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DocID023014 Rev 3 19/23
TDA7391LV Package information
22
b 0.4 0.53 0.0157 0.0209
b1 0.4 0.45 0.5 0.0157 0.0177 0.0197
c 0.23 0.32 0.0091 0.0126
c1 0.23 0.25 0.29 0.0091 0.0098 0.0114
D 15.90 BSC 0.626 BSC
D1(1) 9 13 0.3543 0.5118
D2 1.1 0.0433
D3 5 0.1969
e 1.27 BSC 0.050 BSC
E 14.20 BSC 0.5591 BSC
E1(1) 11.00 BSC 04331 BSC
E2 5.6 6.2 0.2205 0.2441
E3 2.9 0.1142
h 1.1 0.0433
L 0.8 1.1 0.0315 0.0433
L1 1.60 REF 0.063 REF
L2 0.35 BSC 0.0138 BSC
N 20 0.7874
R 0.2 0.0079
R1 0.2 0.0079
S 0.25 0.0098
aaa 0.1 0.0039
bbb 0.3 0.0118
ccc 0.1 0.0039
ddd 0.25 0.0098
eee 0.1 0.0039
ggg 0.25 0.0098
1. Dimensions ‘D’ and ‘E1’ do not include mold flash or protrusions. Allowable mold flash or protrusions is
“0.25 mm” per side D and “0.15 mm” per side E1. D and E1 are Maximum plastic body size dimensions
including mold mismatch.
Table 7. PowerSO-20 (slug-down) package mechanical data (continued)
Symbol
Millimeters Inches
Min. Typ. Max. Min. Typ. Max.
Package information TDA7391LV
20/23 DocID023014 Rev 3
4.3 PowerSO-20 (slug-up) package mechanical data
Figure 29. PowerSO-20 (slug-up) package mechanical drawing
Table 8. PowerSO-20 (slug-up) package mechanical data
Symbol
Millimeters Inches
Min. Typ. Max. Min. Typ. Max.
A 3.25 3.5 0.128 0.1378
A2 3 3.15 3.3 0.1181 0.124 0.1299
a1 0.03 -0.04 0.0012 -0.0016
A4 0.8 1 0.0315 0.0394
A5 0.15 0.2 0.25 0.0059 0.0079 0.0098
b 0.4 0.53 0.0157 0.0209
c 0.23 0.32 0.0091 0.0126
D 15.8 16 0.622 0.6299
D1 (1) 9.4 9.8 0.3701 0.3858
D2 1 0.0394
E 13.9 14.5 0.5472 0.5709
e 1.12 1.27 1.42 0.0441 0.05 0.0559
e3 11.43 0.45
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DocID023014 Rev 3 21/23
TDA7391LV Package information
22
E1 (1) 10.9 11.1 0.4291 0.437
E2 2.9 0.1142
E3 5.8 6.2 0.2283 0.2441
G 0 0.1 0 0.0039
h 1.1 0.0433
H 15.5 15.9 0.6102 0.626
L 0.8 1.1 0.0315 0.0433
N 10d. 10d.
R 0.6 0.0236
s 0d. 8d. 0d. 8d.
V 5d. 7d. 5d. 7d.
1. ‘D’ and ‘E1’ do not include mold flash or protrusions.
Mold flash or protrusions shall not exceed 0.15 mm (0.006 inches) per side.
Table 8. PowerSO-20 (slug-up) package mechanical data (continued)
Symbol
Millimeters Inches
Min. Typ. Max. Min. Typ. Max.
Revision history TDA7391LV
22/23 DocID023014 Rev 3
5 Revision history
Table 9. Document revision history
Date Revision Changes
29-Mar-2012 1 Initial release.
18-Sep-2013 2
Updated:
Features on page 1;
Figure 1: Block diagram on page 5;
Table 2: Pins function.
Updated disclaimer.
01-Dec-2014 3
Updated:
Features and Description on page 1;
Table 5: Electrical characteristics
Section 3.5: Electrical characteristics curves;
Section 4: Package information.
DocID023014 Rev 3 23/23
TDA7391LV
23
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