2 × 24 W BTL or 2 × 12 W
single-ended car radio power
amplifier
Product specification
Supersedes data of February 1995
File under Integrated Circuits, IC01
1995 Dec 13
Page 2
Philips SemiconductorsProduct specification
2 × 24 W BTL or 2 × 12 W single-ended
car radio power amplifier
FEATURES
• Requires very few external components
• High output power
• Flexibility in use - Quad single-ended or stereo BTL
• Low output offset voltage
• Fixed gain
• Diagnostic facility (distortion, short-circuit and
temperature detection)
• Good ripple rejection
• Mode select switch (operating, mute and standby)
• Load dump protection
• AC and DC short-circuit safe to ground and to V
• Low power dissipation in any short-circuit condition
• Thermally protected
• Reverse polarity safe
P
TDA8564Q
• Electrostatic discharge protection
• No switch-on/switch-off plop
• Flexible leads
• Low thermal resistance
• Identical inputs (inverting and non-inverting).
GENERAL DESCRIPTION
The TDA8564Q is an integrated class-B output amplifier in
a 17-lead DIL-bent-SIL power package. It contains
4 × 12 W single-ended or 2 × 24 W bridge amplifiers.
APPLICATIONS
• The device is primarily developed for car radio
applications.
MODE14mode select switch input
INV315inverting input 3
V
DIAG
−INV417non-inverting input 4
FUNCTIONAL DESCRIPTION
The TDA8564Q contains four identical amplifiers which
can be used for single-ended or bridge applications. The
gain of each amplifier is fixed at 40 dB (46 dB in BTL).
Special features of the device are as follows.
5supply voltage 1
13supply voltage 2
16diagnostic output
handbook, halfpage
TDA8564Q
INV1
1
SGND
2
INV2
3
SVRR
4
V
5
P1
OUT1
6
GND1
7
OUT2
8
n.c.
OUT3
GND2
OUT4
V
P2
MODE
INV3
V
DIAG
INV4
Fig.2 Pin configuration.
9
10
11
12
13
14
15
16
17
TDA8564Q
MLC810
Mode select switch (pin 14)
• Low standby current (<100 µA)
• Low switching current (low cost supply switch)
• Mute facility.
To avoid switch-on plops, it is advised to keep the amplifier
in the mute mode during ≥100 ms (charging of the input
capacitors at pins 1, 3, 15 and 17).
This can be achieved by:
• Microcontroller control
• External timing circuit (see Fig.3).
The circuit in Fig.3 slowly ramps up the voltage at the
mode select switch pin when switching on and results in
fast muting when switching off.
In the event of fast switching at mode select pin it is
advised to increase the
1
⁄2VP decoupling capacitor (pin 4)
to 150 µF to avoid switch plops.
1995 Dec 134
handbook, halfpage
Fig.3 Mode select switch circuitry.
V
P
10 kΩ10 kΩ
47 µF
mode
select
switch
100 kΩ
MGA708
Page 5
Philips SemiconductorsProduct specification
2 × 24 W BTL or 2 × 12 W single-ended
car radio power amplifier
Diagnostic output (pin 16)
D
YNAMIC DISTORTION DETECTOR (DDD)
At the onset of clipping of one or more output stages, the
dynamic distortion detector becomes active and pin 16
goes LOW. This information can be used to drive a sound
processor or DC volume control to attenuate the input
signal and thus limit the distortion. The output level of
pin 16 is independent of the number of channels that are
clipping (see Figs 4 and 5).
HORT-CIRCUIT PROTECTION
S
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
20 ms after removal of the short-circuit. During this
short-circuit condition, pin 16 is continuously LOW.
When a short-circuit across the load of one or more
channels occurs the output stages are switched off during
TDA8564Q
approximately 20 ms. After that time it is checked during
approximately 50 µs to see whether the short-circuit is still
present. Due to this duty cycle of 50 µs/20 ms the average
current consumption during this short-circuit condition is
very low (approximately 40 mA).
During this short-circuit condition, pin 16 is LOW for 20 ms
and HIGH for 50 µs (see Fig.6).
The power dissipation in any short-circuit condition is
very low.
EMPERATURE DETECTION
T
When the virtual junction temperature Tvj reaches 150 °C,
pin 16 will be active LOW.
PEN-COLLECTOR OUTPUT
O
Pin 16 is an open-collector output, which allows pin 16 of
1. Plastic or metal protrusions of 0.25 mm maximum per side are not included.
OUTLINE
VERSION
SOT243-1
1995 Dec 1317
REFERENCES
IEC JEDEC EIAJ
EUROPEAN
PROJECTION
ISSUE DATE
92-11-17
95-03-11
Page 18
Philips SemiconductorsProduct specification
2 × 24 W BTL or 2 × 12 W single-ended
car radio power amplifier
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.
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”
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.
(order code 9398 652 90011).
TDA8564Q
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 (T
printed-circuit board has been pre-heated, forced cooling
may be necessary immediately after soldering to keep the
temperature within the permissible limit.
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.
stg max
). If the
DEFINITIONS
Data sheet status
Objective specificationThis data sheet contains target or goal specifications for product development.
Preliminary specificationThis data sheet contains preliminary data; supplementary data may be published later.
Product specificationThis 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 APPLICA TIONS
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.
1995 Dec 1318
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