TDA7391 Datasheet by STMicroelectronics

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This is information on a product in full production.
September 2013 DocID1509 Rev 5 1/13
TDA7391
35 W bridge car radio amplifier
Datasheet - production data
Features
High power capability:
40 W/4 max
35 W/4 EIAJ
45 W/3.2 max
40 W/3.2 EIAJ
32 W/3.2 @ V
S
= 14.4 V, f = 1 kHz,
d=10 %
26 W/4 @ V
S
= 14.4 V, f = 1 kHz,
d=10%
DIfferential inputs (either single ended or
differential input signal are accepted)
Minimum external component count:
No bootstrap capacitors
No Boucherot cells
Internally fixed gain (30 dB)
No SVR Capacitor
Standby function (CMOS compatible)
Programmable turn-on/off delay
No audible pop during mute and standby
operations
Protections:
Short circuit (to GND, to V
S
, across the
load)
Very inductive loads
Chip over temperature
Load dump
Open GND
– ESD
Description
The TDA7391 is a bridge class AB audio power
amplifier specially intended for car radio high
power 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 boosters and high end car radio
equipments. 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.
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Multiwatt11
Table 1. Device summary
Order code Package Packing
TDA7391 Multiwatt11 (vertical) Tube
www.st.com
Contents TDA7391
2/13 DocID1509 Rev 5
Contents
1 Block and pin description diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.1 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.2 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2 Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.1 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.2 Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.3 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.4 Electrical characteristics curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3 Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
DocID1509 Rev 5 3/13
TDA7391 List of tables
3
List of tables
Table 1. Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Table 2. Pin functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Table 3. Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Table 4. Thermal data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Table 5. Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Table 6. Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
List of figures TDA7391
4/13 DocID1509 Rev 5
List of figures
Figure 1. Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Figure 2. Pin connection (top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Figure 3. Test and application circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Figure 4. Printed circuit board and component layout of the Figure 4 . . . . . . . . . . . . . . . . . . . . . . . . . 9
Figure 5. Quiescent current vs. supply voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Figure 6. EIAJ power vs. supply voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Figure 7. Output power vs. supply voltage (RL = 4 ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Figure 8. Distortion vs. frequency (RL = 4 ). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Figure 9. Output power vs. supply voltage (RL = 3.2 ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Figure 10. Distortion vs. frequency (RL = 3.2 ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Figure 11. Supply voltage rejection vs. frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Figure 12. Common mode rejection vs. frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Figure 13. Total power dissipation and efficiency vs. output power (RL = 4) . . . . . . . . . . . . . . . . . . 10
Figure 14. Power bandwidth . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Figure 15. Multiwatt11 (vertical) mechanical data and package dimensions . . . . . . . . . . . . . . . . . . . . 11
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DocID1509 Rev 5 5/13
TDA7391 Block and pin description diagrams
12
1 Block and pin description diagrams
1.1 Block diagram
Figure 1. Block diagram
1.2 Pin description
Figure 2. Pin connection (top view)
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Block and pin description diagrams TDA7391
6/13 DocID1509 Rev 5
Table 2. Pin functional description
Pin# Pin name Description
1, 2 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 +V
Supply voltage.
4CD
The TDA7391 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.
5, 7 OUTPUTS
The output stage is a bridge type able to drive loads as low as 3.2. 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 GND Ground.
8 STAND-BY
The device features a standby function which shuts down all the internal bias
supplies when the STAND-BY pin is low. In standby mode the amplifier sinks a
small current (in the range of few A). When the STAND-BY pin is high the IC
becomes fully operational.
10 SYNC
A resistor (R
2
) has to be connect between pin 10 and GND in order to program
the current that flows in the C
3
capacitor (pin 11). The values of C
3
and R
2
determine the time required to bias the amplifier.
11 MUTE
The pin will have a capacitor (C
3
) tied to GND to set the MUTE/STAND-BY
time. An automatic Mute during turn on/off is provided to prevent noisy
transients.
DocID1509 Rev 5 7/13
TDA7391 Electrical specifications
12
2 Electrical specifications
2.1 Absolute maximum ratings
2.2 Thermal data
2.3 Electrical characteristics
Refer to the test circuit, VS = 14.4 V; RL = 4 , f = 1 kHz, Tamb = 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(1)
1. A suitable heatsink/dissipation system should be used to keep Tj inside specified limits.
-40 to 150 C
Tamb Operative ambient temperature range -40 to 105 °C
Table 4. Thermal data
Symbol Parameter Value Unit
R
th j-case
Thermal resistance junction to case Max 1.8 °C/W
Table 5. Electrical characteristics
Symbol Parameter Test condition Min. Typ. Max. Unit
V
S
Supply voltage range - 8 - 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 - - 100 A
I
SBin
Standby input bias current V
ST-BY
= 5 V - - 10 A
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 A
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Electrical specifications TDA7391
8/13 DocID1509 Rev 5
Figure 3. Test and application circuit
A
M
Mute attenuation - - 90 - dB
P
O
Output power
d = 10 % 20 26 - W
d = 1 % - 21 - W
d = 10 %; R
L
= 3.2 -32-W
P
O EIAJ
EIAJ output power(1) V
S
= 13.7 V; R
L
= 3.2 -40-W
P
O MAX
Max. output power(1) V
S
= 14.4 V; R
L
= 3.2 -45-W
d Distortion
- - 0.06 - %
P
O
= 0.1 to 15 W - 0.03 - %
G
V
Voltage gain - 29.5 30 30.5 dB
f
H
High frequency roll-off P
O
= 1W; -3dB 75 - kHz
R
IN
Input Impedance
Differential 36 60 - k
Single Ended 30 55 - k
E
IN
Input noise voltage R
g
= 0 ; f = 22 Hz to 22 kHz - 4 - mV
CMRR Input common mode rejection f = 1 kHz; V
IN
= 1 Vrms - 65 - dB
SVR Supply voltage rejection R
g
= 0 ; 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
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TDA7391 Electrical specifications
12
Figure 4. Printed circuit board and component layout of the Figure 4
2.4 Electrical characteristics curves
Figure 5. Quiescent current vs. supply voltage Figure 6. EIAJ power vs. supply voltage
Figure 7. Output power vs. supply voltage
(RL = 4 )
Figure 8. Distortion vs. frequency (RL = 4 )
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Electrical specifications TDA7391
10/13 DocID1509 Rev 5
Figure 9. Output power vs. supply voltage
(R
L
= 3.2 )
Figure 10. Distortion vs. frequency
(R
L
= 3.2 )
Figure 11. Supply voltage rejection vs.
frequency
Figure 12. Common mode rejection vs.
frequency
Figure 13. Total power dissipation and
efficiency vs. output power (R
L
= 4)
Figure 14. Power bandwidth
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DocID1509 Rev 5 11/13
TDA7391 Package information
12
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 15. Multiwatt11 (vertical) mechanical data and package dimensions
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'      
(  
(  
,      
,      
,    
,      
,      
,    
-      
-      
3    
3    
$IA    
-ULTIWATT6ERTICAL
Revision history TDA7391
12/13 DocID1509 Rev 5
4 Revision history
Table 6. Document revision history
Date Revision Changes
24-May1998 3 Initial release.
19-Jun-2013 4 Updated Table 3: Absolute maximum ratings on page 7.
18-Sep-2013 5 Updated Disclaimer.
TS AT
DocID1509 Rev 5 13/13
TDA7391
13
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