Philips TDA8571J car radio power amplifier Preliminary specification

Philips TDA8571J car radio power amplifier Preliminary specification

Below you will find brief information for car radio power amplifier TDA8571J. The TDA8571J is a class-B output amplifier that features four amplifiers in a BTL configuration, each with a gain of 34 dB. It delivers a maximum output power of 4 × 40 W into a 4 Ω load. It is designed for car radio applications.

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TDA8571J Car Radio Power Amplifier Datasheet | Manualzz
INTEGRATED CIRCUITS
DATA SHEET
TDA8571J
4 x 40 W BTL quad car radio power
amplifier
Preliminary specification
File under Integrated Circuits, IC01
1998 Mar 13
Philips Semiconductors
Preliminary specification
4 x 40 W BTL quad car radio power
amplifier
TDA8571J
FEATURES
GENERAL DESCRIPTION
• Requires very few external components
• Fixed gain
The TDA8571J is a integrated class-B output amplifier
contained in a 23-lead Single-In-Line (SIL) plastic power
package. It contains four amplifiers in a BTL configuration,
each with a gain of 34 dB. The output power is 4 × 40 W
(EIAJ) into a 4 Ω load.
• Diagnostic facility (distortion, short-circuit and
temperature pre-warning)
APPLICATIONS
• High output power
• Low output offset voltage
• Good ripple rejection
• The device is primarily developed for car radio
applications.
• Mode select switch (operating, mute and standby)
• Load dump protection
• Short-circuit safe to ground and to VP and across the
load
• Low power dissipation in any short-circuit condition
• Thermally protected
• Reverse polarity safe
• Electrostatic discharge protection
• No switch-on/switch-off plop
• Flexible leads
• Low thermal resistance
• Pin compatible with the TDA8568Q, except for the gain.
QUICK REFERENCE DATA
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
VP
operating supply voltage
6
14.4
18
V
IORM
repetitive peak output current
−
−
7.5
A
Iq(tot)
total quiescent current
−
200
−
mA
Istb
standby current
−
0.2
100
µA
Isw
switch-on current
−
−
80
µA
Zi
input impedance
25
30
−
kΩ
Po(max)
maximum output power
THD = maximum
−
40
−
W
SVRR
supply voltage ripple rejection
Rs = 0 Ω
−
50
−
dB
αcs
channel separation
Rs = 10 kΩ
−
50
−
dB
Gv(cl)
closed-loop voltage gain
33
34
35
dB
Vn(o)
noise output voltage
Rs = 0 Ω
−
−
170
µV
VOS
DC output offset voltage
MUTE
−
−
80
mV
∆VOS
delta DC output offset voltage
ON ↔ MUTE
−
−
80
mV
ORDERING INFORMATION
PACKAGE
TYPE
NUMBER
NAME
DESCRIPTION
VERSION
TDA8571J
DBS23P
plastic DIL-bent-SIL power package; 23 leads (straight lead length 3.2 mm)
SOT411-1
1998 Mar 13
2
Philips Semiconductors
Preliminary specification
4 x 40 W BTL quad car radio power
amplifier
TDA8571J
BLOCK DIAGRAM
handbook, full pagewidth
IN1
MODE
VP1
VP2
15
1
8
10
VP3
VP4
16
23
+
2
−
OUT1+
30 kΩ
+
4
−
IN2
OUT1−
Vref
11
+
7
−
OUT2+
30 kΩ
+
SGND
12
TDA8571J
IN3
5
−
13
DIAGNOSTIC
+
9
17
−
OUT2−
VDIAG
OUT3+
30 kΩ
+
19
−
IN4
OUT3−
Vref
14
+
22
−
OUT4+
30 kΩ
+
20
−
3
PGND1
6
PGND2
18
21
PGND3
PGND4
Fig.1 Block diagram.
1998 Mar 13
3
OUT4−
MGM562
Philips Semiconductors
Preliminary specification
4 x 40 W BTL quad car radio power
amplifier
TDA8571J
PINNING
SYMBOL
PIN
DESCRIPTION
VP1
1
supply voltage 1
OUT1+
2
output 1+
PGND1
3
OUT1−
OUT2−
handbook, halfpage
VP1
1
power ground 1
OUT1+
2
4
output 1−
PGND1
3
5
output 2−
OUT1−
4
PGND2
6
power ground 2
OUT2−
5
OUT2+
7
output 2+
VP2
8
supply voltage 2
PGND2
6
VDIAG
9
diagnostic output
OUT2+
7
IN1
10
input 1
VP2
8
IN2
11
input 2
VDIAG
9
SGND
12
signal ground
IN1 10
IN3
13
input 3
IN2 11
IN4
14
input 4
MODE
15
mode select switch input
VP3
16
supply voltage 3
OUT3+
17
output 3+
PGND3
18
power ground 3
OUT3−
19
output 3−
VP3 16
OUT4−
20
output 4−
OUT3+ 17
PGND4
21
power ground 4
PGND3 18
OUT4+
22
output 4+
VP4
23
supply voltage 4
SGND 12
TDA8571J
IN3 13
IN4 14
MODE 15
OUT3− 19
OUT4− 20
PGND4 21
OUT4+ 22
VP4 23
MGM563
Fig.2 Pin configuration.
1998 Mar 13
4
Philips Semiconductors
Preliminary specification
4 x 40 W BTL quad car radio power
amplifier
TDA8571J
FUNCTIONAL DESCRIPTION
SHORT-CIRCUIT DIAGNOSTIC
The TDA8571J contains four identical amplifiers which can
be used for bridge applications. The gain of each amplifier
is fixed at 34 dB.
When a short-circuit occurs at one or more outputs to
ground or to the supply voltage, the output stages are
switched off until the short-circuit is removed and the
device is switched on again, with a delay of approximately
10 ms after removal of the short-circuit. During this
short-circuit condition, pin 9 is continuously LOW.
Mode select switch (pin 15)
• Standby: low supply current (<100 µA)
When a short-circuit occurs across the load of one or more
channels, the output stages are switched off during
approximately 10 ms. After that time it is checked during
approximately 50 µs to determine whether the short-circuit
is still present.
Due to this duty cycle of 50 µs/10 ms the average current
consumption during this short-circuit condition is very low.
• Mute: input signal suppressed
• Operating: normal on condition.
Since this pin has a low input current (<80 µA), a low cost
supply switch can be applied.
To avoid switch-on plops, it is advised to keep the amplifier
in the mute mode during ≥150 ms (charging of the input
capacitors at pins 10, 11, 13 and 14). When switching
from standby to mute, the slope should be at least 18 V/s.
• External timing circuit (see Fig.3).
During this short-circuit condition, pin 9 is LOW for 10 ms
and HIGH for 50 µs (see Fig.5). The protection circuits of
all channels are coupled. This means that if a short-circuit
condition occurs in one of the channels, all channels are
switched off. Consequently, the power dissipation in any
short-circuit condition is very low.
Diagnostic output (pin 9)
TEMPERATURE PRE-WARNING
DYNAMIC DISTORTION DETECTOR (DDD)
When the virtual junction temperature Tvj reaches 145 °C,
pin 9 goes LOW.
This can be realized by:
• Microprocessor control
At the onset of clipping of one or more output stages, the
dynamic distortion detector becomes active and pin 9
goes LOW. This information can be used to drive a sound
processor or DC volume control to attenuate the input
signal and so limit the distortion. The output level of pin 9
is independent of the number of channels that are clipping
(see Fig.4).
OPEN COLLECTOR OUTPUTS
The diagnostic pin has an open collector output, so more
devices can be tied together. An external pull-up resistor is
needed.
handbook, halfpage
Vo
MGG155
+V
handbook, halfpage P
0
10 kΩ
MODE
47 µF
V9
BZX79C/3.9V
VP
MGD959
0
Fig.3 Mode select switch circuitry.
1998 Mar 13
t
Fig.4 Distortion detector waveform.
5
Philips Semiconductors
Preliminary specification
4 x 40 W BTL quad car radio power
amplifier
TDA8571J
handbook, full pagewidthshort
MGG156
circuit
current
t
short-circuit over the load
V9
10 ms
VP
t
50 µs
Fig.5 Short-circuit waveform.
1998 Mar 13
6
Philips Semiconductors
Preliminary specification
4 x 40 W BTL quad car radio power
amplifier
TDA8571J
LIMITING VALUES
In accordance with the Absolute Maximum Rating System (IEC 134).
SYMBOL
VP
PARAMETER
CONDITIONS
supply voltage
MIN.
MAX.
UNIT
operating
−
18
V
non-operating
−
30
V
load dump protection;
during 50 ms; tr ≥ 2.5 ms
−
45
V
Vsc(safe)
short-circuit safe voltage
−
18
V
Vrp
reverse polarity voltage
−
6
V
IOSM
non-repetitive peak output current
−
10
A
IORM
repetitive peak output current
−
7.5
A
Ptot
total power dissipation
−
60
W
Tstg
storage temperature
−55
+150
°C
Tamb
operating ambient temperature
−40
+85
°C
Tvj
virtual junction temperature
−
150
°C
THERMAL CHARACTERISTICS
SYMBOL
PARAMETER
VALUE
UNIT
Rth j-a
thermal resistance from junction to ambient in free air
40
K/W
Rth j-c
thermal resistance from junction to case (see Fig.6)
1
K/W
virtual junction
handbook, halfpage
OUT1
3.2 K/W
OUT2
OUT3
3.2 K/W
3.2 K/W
OUT4
3.2 K/W
0.2 K/W
case
MGG157
Fig.6 Equivalent thermal resistance network.
1998 Mar 13
7
Philips Semiconductors
Preliminary specification
4 x 40 W BTL quad car radio power
amplifier
TDA8571J
QUALITY SPECIFICATION
In accordance with “SNW-FQ-0611E”. The number of the quality specification can be found in the “Quality Reference
Handbook”. The handbook can be ordered using the code 9397 750 00192.
DC CHARACTERISTICS
VP = 14.4 V; Tamb = 25 °C; measured in Fig.7; unless otherwise specified.
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
Supply
VP
supply voltage
note 1
6
14.4
18
V
Iq(tot)
quiescent current
RL = ∞
−
200
360
mA
8.5
−
Vp
V
Operating condition
V15
mode select switch level
I15
mode select switch current
V15 = 14.4 V
−
30
80
µA
VO
output voltage
note 2
−
7.0
−
V
3.3
−
6.4
V
Mute condition
V15
mode select switch level
VO
output voltage
note 2
−
7.0
−
V
VOS
DC output offset voltage
MUTE
−
−
80
mV
∆VOS
delta DC output offset voltage
ON ↔ MUTE
−
−
80
mV
Standby condition
V15
mode select switch level
0
−
2
V
Istb
standby current
−
0.2
100
µA
Diagnostic
V9
diagnostic output voltage
during any fault condition
−
−
0.6
V
Tvj
temperature pre-warning
V9 = 0.6 V
−
145
−
°C
Notes
1. The circuit is DC adjusted at VP = 6 to 18 V and AC operating at VP = 8.5 to 18 V.
2. At 18 V < VP < 30 V the DC output voltage ≤ 1⁄2VP.
1998 Mar 13
8
Philips Semiconductors
Preliminary specification
4 x 40 W BTL quad car radio power
amplifier
TDA8571J
AC CHARACTERISTICS
VP = 14.4 V; RL = 4 Ω; f = 1 kHz; Tamb = 25 °C; measured in Fig.7; unless otherwise specified.
SYMBOL
Po
PARAMETER
output power
CONDITIONS
MIN.
TYP.
MAX.
UNIT
THD = 0.5%
16
19
−
W
THD = 10%
21
26
−
W
VP = 13.7 V; THD = 0.5%
−
17.5
−
W
VP = 13.7 V; THD = 10%
−
23
−
W
40
−
W
Po(max)
maximum output power
THD = maximum; Vi = 2 V (p-p) 34
square wave
THD
total harmonic distortion
Po = 1 W
−
0.1
−
%
V9 = 0.6 V; note 1
−
10
−
%
Bp
power bandwidth
THD = 0.5%; Po = −1 dB
with respect to 16 W
−
20 to
20000
−
Hz
fro(l)
low frequency roll-off
at −1 dB; note 2
−
25
−
Hz
fro(h)
high frequency roll-off
at −1 dB
20
−
−
kHz
Gv(cl)
closed-loop voltage gain
33
34
35
dB
SVRR
supply voltage ripple rejection on; Rs = 0 Ω;
Vripple = Vripple(max) = 2 V (p-p)
40
−
−
dB
mute; Rs = 0 Ω;
Vripple = Vripple(max) = 2 V (p-p)
50
−
−
dB
standby; Rs = 0 Ω;
Vripple = Vripple(max) = 2 V (p-p)
80
−
−
dB
25
30
38
kΩ
on; Rs = 0 Ω;
B = 20 Hz to 20 kHz
−
125
170
µV
on; Rs = 10 kΩ;
B = 20 Hz to 20 kHz
−
150
−
µV
mute; B = 20 Hz to 20 kHz;
independent of Rs
−
100
−
µV
Po = 16 W; Rs = 10 kΩ
45
−
−
dB
−
−
1
dB
−
−
2
mV
Zi
input impedance
Vn(o)
noise output voltage
αcs
channel separation
∆Gv
channel unbalance
Vo
output signal in mute
Vi = Vi(max) = 1 V (RMS)
Notes
1. Dynamic Distortion Detector (DDD) active, pin 9 is set to logic 0.
2. Frequency response externally fixed.
1998 Mar 13
9
Philips Semiconductors
Preliminary specification
4 x 40 W BTL quad car radio power
amplifier
TDA8571J
TEST AND APPLICATION INFORMATION
VP
handbook, full pagewidth
+14.4 V
MODE
15
IN1
input 1
VP1
VP2
VP3
VP4
1
8
16
23
10
+
470 nF
100 nF
2
2200 µF
OUT1+
−
RL = 4 Ω
30 kΩ
+
4
OUT1−
7
OUT2+
−
IN2
input 2
Vref
11
+
470 nF
−
RL = 4 Ω
30 kΩ
+
SGND
IN3
OUT2−
9
VDIAG
17
OUT3+
−
12
10 kΩ
TDA8571J
input 3
5
13
DIAGNOSTIC
+
470 nF
+VP
diagnostic
output
−
RL = 4 Ω
30 kΩ
+
19
OUT3−
22
OUT4+
−
IN4
input 4
Vref
14
+
470 nF
−
RL = 4 Ω
30 kΩ
+
20
OUT4−
−
3
6
18
21
PGND1
PGND2
PGND3
PGND4
power ground (substrate)
MGM564
Special care must be taken in the PCB-layout to separate pin 9 from the pins 10, 11 13 and 14 to minimize the crosstalk between the clip output and
the inputs.
To avoid switch-on plops, it is advised to keep the amplifier in the mute mode during a period of ≥ 150 ms (charging the input capacitors at pins
10, 11, 13 and 14).
Fig.7 Application circuit diagram.
1998 Mar 13
10
Philips Semiconductors
Preliminary specification
4 x 40 W BTL quad car radio power
amplifier
TDA8571J
Test information
Figures 8 to 13 have the following conditions: VP = 14.4 V; RL = 4 Ω; f = 1 kHz; 80 kHz filter used; unless otherwise
specified.
MGM566
300
MGM567
80
handbook, halfpage
handbook, halfpage
Po
(W)
IP
(mA)
60
200
40
(1)
100
(2)
20
(3)
0
0
0
4
8
12
16
20
VP (V)
8
10
12
14
16
VP (V)
18
(1) EIAJ; 100 Hz.
(2) THD + N = 10%.
(3) THD + N = 0.5%.
Fig.8 IP as a function of VP.
Fig.9 Po as a function of VP.
MGM568
10
MGM569
10
handbook, halfpage
handbook, halfpage
THD + N
(%)
THD + N
(%)
1
1
(1)
(1)
(2)
10−1
10−1
(2)
(3)
10−2
10−2
10−1
1
10
Po (W)
10−2
10
102
(1) f = 10 kHz.
(2) f = 1 kHz.
(3) f = 100 Hz.
103
104
f (Hz)
105
(1) Po = 1 W.
(2) Po = 10 W.
Fig.10 THD + N as a function of Po.
1998 Mar 13
102
Fig.11 THD + N as a function of frequency.
11
Philips Semiconductors
Preliminary specification
4 x 40 W BTL quad car radio power
amplifier
TDA8571J
MGM570
−20
MGM565
−30
handbook, halfpage
handbook, halfpage
SVRR
(dB)
αcs
(dB)
−40
−50
−60
−70
(1)
(2)
−80
10
102
103
104
f (Hz)
−90
10
105
102
103
104
f (Hz)
105
(1) Between channels 1 and 2 or between channels 3 and 4.
(2) Between channels 1 or 2 and channels 3 or 4.
Fig.13 Channel separation as a function of
frequency.
Fig.12 SVRR as a function of frequency.
1998 Mar 13
12
Philips Semiconductors
Preliminary specification
4 x 40 W BTL quad car radio power
amplifier
TDA8571J
PCB layout
111.76
handbook, full pagewidth
78.74
Pgnd
100 nF
2200 µF
−
VP
−
−
out 4
out1
+
+
470 nF
470 nF
−
−
out2
out 3
+
10 kΩ
diag
in
1
in
sgnd
2
3
mode
+
4
MGK079
Dimensions in mm.
Fig.14 PCB layout (component side).
1998 Mar 13
13
Philips Semiconductors
Preliminary specification
4 x 40 W BTL quad car radio power
amplifier
TDA8571J
111.76
handbook, full pagewidth
78.74
Pgnd
100nF
2200 µF
−
VP
−
−
out 4
out1
+
+
470 nF
470 nF
−
−
out2
out 3
+
mode
in
4
in
sgnd
3
2
diag
+
10 kΩ
1
MGK080
Dimensions in mm.
Fig.15 PCB layout (soldering side).
1998 Mar 13
14
Philips Semiconductors
Preliminary specification
4 x 40 W BTL quad car radio power
amplifier
TDA8571J
PACKAGE OUTLINE
DBS23P: plastic DIL-bent-SIL power package; 23 leads (straight lead length 3.2 mm)
SOT411-1
non-concave
Dh
x
D
Eh
view B: mounting base side
d
A2
β
A5
A4
E2
B
j
E
E1
L2
L3
L1
1
23
L
e1
Z
bp
e
c
Q
v M
w M
e2
m
0
5
10 mm
scale
DIMENSIONS (mm are the original dimensions)
UNIT A 2
mm
A4
A5
bp
c
D (1)
d
D h E (1)
e
e1
e2
12.2
4.6 1.15 1.65 0.75 0.55 30.4 28.0
12
2.54 1.27 5.08
11.8
4.3 0.85 1.35 0.60 0.35 29.9 27.5
Eh
E1
E2
j
L
L1
L2
L3
m
Q
v
w
x
β
Z (1)
6 10.15 6.2 1.85 3.6 14.0 10.7 2.4 4.3 2.1 0.6 0.25 0.03 45° 1.43
9.85 5.8 1.65 2.8 13.0 9.9 1.6
0.78
1.8
Note
1. Plastic or metal protrusions of 0.25 mm maximum per side are not included.
OUTLINE
VERSION
REFERENCES
IEC
JEDEC
EIAJ
ISSUE DATE
96-10-11
98-02-20
SOT411-1
1998 Mar 13
EUROPEAN
PROJECTION
15
Philips Semiconductors
Preliminary specification
4 x 40 W BTL quad car radio power
amplifier
TDA8571J
The device may be mounted up to the seating plane, but
the temperature of the plastic body must not exceed the
specified maximum storage temperature (Tstg max). If the
printed-circuit board has been pre-heated, forced cooling
may be necessary immediately after soldering to keep the
temperature within the permissible limit.
SOLDERING
Introduction
There is no soldering method that is ideal for all IC
packages. Wave soldering is often preferred when
through-hole and surface mounted components are mixed
on one printed-circuit board. However, wave soldering is
not always suitable for surface mounted ICs, or for
printed-circuits with high population densities. In these
situations reflow soldering is often used.
Repairing soldered joints
Apply a low voltage soldering iron (less than 24 V) to the
lead(s) of the package, below the seating plane or not
more than 2 mm above it. If the temperature of the
soldering iron bit is less than 300 °C it may remain in
contact for up to 10 seconds. If the bit temperature is
between 300 and 400 °C, contact may be up to 5 seconds.
This text gives a very brief insight to a complex technology.
A more in-depth account of soldering ICs can be found in
our “IC Package Databook” (order code 9398 652 90011).
Soldering by dipping or by wave
The maximum permissible temperature of the solder is
260 °C; solder at this temperature must not be in contact
with the joint for more than 5 seconds. The total contact
time of successive solder waves must not exceed
5 seconds.
DEFINITIONS
Data sheet status
Objective specification
This data sheet contains target or goal specifications for product development.
Preliminary specification
This data sheet contains preliminary data; supplementary data may be published later.
Product specification
This data sheet contains final product specifications.
Limiting values
Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 134). Stress above one or
more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation
of the device at these or at any other conditions above those given in the Characteristics sections of the specification
is not implied. Exposure to limiting values for extended periods may affect device reliability.
Application information
Where application information is given, it is advisory and does not form part of the specification.
LIFE SUPPORT APPLICATIONS
These products are not designed for use in life support appliances, devices, or systems where malfunction of these
products can reasonably be expected to result in personal injury. Philips customers using or selling these products for
use in such applications do so at their own risk and agree to fully indemnify Philips for any damages resulting from such
improper use or sale.
1998 Mar 13
16
Philips Semiconductors
Preliminary specification
4 x 40 W BTL quad car radio power
amplifier
TDA8571J
NOTES
1998 Mar 13
17
Philips Semiconductors
Preliminary specification
4 x 40 W BTL quad car radio power
amplifier
TDA8571J
NOTES
1998 Mar 13
18
Philips Semiconductors
Preliminary specification
4 x 40 W BTL quad car radio power
amplifier
TDA8571J
NOTES
1998 Mar 13
19
Philips Semiconductors – a worldwide company
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United States: 811 East Arques Avenue, SUNNYVALE, CA 94088-3409,
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Uruguay: see South America
Vietnam: see Singapore
Yugoslavia: PHILIPS, Trg N. Pasica 5/v, 11000 BEOGRAD,
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For all other countries apply to: Philips Semiconductors,
International Marketing & Sales Communications, Building BE-p, P.O. Box 218,
5600 MD EINDHOVEN, The Netherlands, Fax. +31 40 27 24825
Internet: http://www.semiconductors.philips.com
© Philips Electronics N.V. 1998
SCA57
All rights are reserved. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner.
The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed
without notice. No liability will be accepted by the publisher for any consequence of its use. Publication thereof does not convey nor imply any license
under patent- or other industrial or intellectual property rights.
Printed in The Netherlands
545102/1200/01/pp20
Date of release: 1998 Mar 13
Document order number:
9397 750 03261

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Key Features

  • 4 x 40 W BTL quad car radio power amplifier
  • Fixed gain of 34 dB
  • Diagnostic facility
  • Mode select switch
  • Load dump protection
  • Short-circuit safe
  • Low power dissipation
  • Thermally protected
  • Reverse polarity safe
  • Electrostatic discharge protection

Frequently Answers and Questions

What is the maximum output power of the TDA8571J?
The TDA8571J has a maximum output power of 4 x 40 W into a 4 Ω load.
What is the gain of each amplifier in the TDA8571J?
The gain of each amplifier in the TDA8571J is fixed at 34 dB.
What are the applications of the TDA8571J?
The TDA8571J is primarily developed for car radio applications.
What is the purpose of the mode select switch in the TDA8571J?
The mode select switch allows you to put the TDA8571J in standby, mute, or operating mode.
How does the TDA8571J protect itself from short-circuits?
The TDA8571J has short-circuit protection that switches off the output stage when a short-circuit occurs.

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