TDA7391PD
32 W bridge car radio amplifier
Features
■
High power capability:
– 40 W/3.2 EIAJ
– 32 W/3.2 @ VS = 14.4 V, f = 1 kHz,
d = 10 %
– 26 W/4 @ VS = 14.4 V, f = 1 kHz,
d = 10 %
■
Differential inputs (either single ended or
differential input signal are accepted)
'!0'03
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■
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 stand-by
operations
PowerSO20
(slug-up)
Description
The TDA7391PD is a bridge class AB audio
power amplifier specially intended for car radio
high power applications.
Protections
■
Short circuit (to GND, to VS, across the load)
■
Very inductive loads
■
Chip over temperature
■
Load dump
■
Open GND
■
ESD
Table 1.
PowerSO20
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
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.
Device summary
Order code
Package
Packing
E-TDA7391PD
PowerSO20
Tube
E-TDA7391PDTR
PowerSO20
Tape and reel
TDA7391PDU
PowerSO20 (slug-up)
Tube
TDA7391PDUTR
PowerSO20 (slug-up)
Tape and reel
September 2013
Doc ID 6326 Rev 5
1/12
www.st.com
12
Contents
TDA7391PD
Contents
1
Test and application circuit, block diagram . . . . . . . . . . . . . . . . . . . . . . 3
2
Pins description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3
Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3.1
Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3.2
Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3.3
Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3.4
Electrical characteristics curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
4
Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
5
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2/12
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TDA7391PD
1
Test and application circuit, block diagram
Test and application circuit, block diagram
Figure 1.
Test and application circuit
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Block diagram
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Pins description
2
TDA7391PD
Pins description
Figure 3.
Pins connection (top view)
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Table 2.
Pin
Function
Description
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.
14, 15
INPUTS
5, 16
+V
S
Supply voltage.
17
CD
The TDA7391PD 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.
2, 19
4/12
Pins function
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.
OUTPUTS A rail to rail output voltage swing is achieved without need of bootstrap
capacitors.
No external compensation is necessary.
1, 10,
11, 20
GND
Power Ground.
12
S-GND
Signal ground.
4
The device features a ST-BY function which shuts down all the internal bias
supplies when the ST-BY pin is low. In ST-BY mode the amplifier sinks a small
STAND-BY
current (in the range of few A). When the ST-BY pin is high the IC becomes
fully operational.
8
SYNC
A resistor (R2) has to be connect between pin 8 and GND in order to program
the current
that flows in the C3 capacitor (pin 9). The values of C3 and R2 determine the
time required to bias the amplifier.
9
MUTE
The pin will have a capacitor (C3) tied to GND to set the MUTE/STAND-BY
time.
An automatic Mute during turn on/off is provided to prevent noisy transients.
Doc ID 6326 Rev 5
TDA7391PD
Electrical specifications
3
Electrical specifications
3.1
Absolute maximum ratings
Table 3.
Absolute maximum ratings
Symbol
Value
Unit
VS
DC supply voltage
28
V
VOP
Operating supply voltage
18
V
Peak supply voltage (t = 50 ms)
50
V
Output peak current repetitive (f > 10 Hz)
4.5
A
Output peak current non repetitive
6
A
Ptot
Power dissipation (Tcase = 85 °C)
32
W
Tstg, Tj
Storage and junction temperature
-40 to 150
C
VPEAK
IO
3.2
Parameter
Thermal data
Table 4.
Thermal data
Symbol
Rth j-case
3.3
Parameter
Thermal resistance junction-to-case
Value
Unit
2
°C/W
Max.
Electrical characteristics
VS = 14.4 V; RL = 4 , f = 1 kHz, Tamb = 25 °C, unless otherwise specified.
Table 5.
Symbol
Electrical characteristics
Parameter
Test condition
Min.
Typ.
Max.
Unit
VS
Supply voltage range
-
8
-
18
V
Iq
Total quiescent current
-
-
60
150
mA
VOS
Output offset voltage
-
-
-
120
mV
ISB
Standby current
VST-BY = 1.5 V
-
-
100
A
ISBin
Standby input Bias current
VST-BY = 5 V
-
-
10
A
VSBon
Standby on threshold voltage
-
-
-
1.5
V
VSBoff
Standby off threshold voltage
-
3.5
-
-
V
Standby attenuation
-
-
90
-
dB
IM in
Mute input bias current
(VMUTE = 5 V)
-
-
10
A
AM
Mute attenuation
-
-
90
-
dB
ATTStandby
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Electrical specifications
Table 5.
TDA7391PD
Electrical characteristics (continued)
Symbol
Parameter
PO
Test condition
Output power
EIAJ output power (*)
PO EIAJ
d
Min.
Typ.
Max.
Unit
d = 10 %
20
26
-
W
d=1%
-
21
-
W
d = 10 %; RL = 3.2
-
32
-
W
VS = 13.7 V
-
40
-
W
-
-
0.06
-
%
PO = 0.1 to 15 W
-
0.03
-
%
29.5
30
30.5
dB
Distortion
GV
Voltage gain
-
fH
High frequency rolloff
PO = 1 W; -3 dB
75
-
-
kHz
Differential
36
60
-
k
Single Ended
30
55
-
k
RIN
Input Impedance
EIN
Input noise voltage
Rg = 0 ; f = 22 Hz to 22 kHz
-
4
-
mV
Input common mode rejection
f = 1 kHz; VIN = 1 Vrms
-
65
-
dB
SVR
Supply voltage rejection
Rg = 0 ; Vr = 1 Vrms
-
60
-
dB
CDL
Clipping detection level
-
-
10
-
%
Tsd
Absolute thermal shutdown
junction temperature
-
-
160
-
C
CMRR
3.4
Electrical characteristics curves
Figure 4.
Quiescent current vs. supply
voltage
Figure 5.
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EIAJ power vs. supply voltage
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TDA7391PD
Figure 6.
Electrical specifications
Output power vs. supply voltage
(@RL = 4
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Figure 7.
Distortion vs. frequency (@ RL = 4)
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Figure 8.
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Output power vs. supply voltage
(@RL = 3.2)
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Figure 9.
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Distortion vs. frequency
(@ RL = 3.2)
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frequency
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Figure 11. Common mode rejection vs.
frequency
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Electrical specifications
TDA7391PD
Figure 12. Total power dissipation and effic.
vs. output power (@RL = 4
Figure 13. Power bandwidth
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TDA7391PD
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 14. PowerSO20 mechanical data and package dimensions
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Package information
TDA7391PD
Figure 15. PowerSO20 (slug-up) mechanical data and package dimensions
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Doc ID 6326 Rev 5
TDA7391PD
5
Revision history
Revision history
Added
Table 6.
Document revision history
Date
Revision
Changes
10-Oct-1998
1
Initial release.
02-Jul-2008
2
Document reformatted.
Document status promoted from product preview to datasheet.
Added Table 1: Device summary.
Added ECOPACK description in Section 5: Package information.
19-Apr-2010
3
Updated Table 1: Device summary.
26-Jan-2011
4
Updated Table 1: Device summary.
Added PowerSO20 (slug-up) drawing in Figure 3.
Added PowerSO20 (slug-up) in Section 4: Package information.
16-Sep-2013
5
Updated Disclaimer.
Doc ID 6326 Rev 5
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TDA7391PD
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