Philips TDA8564Q Datasheet
Philips Semiconductors Preliminary specification
2 × 24 W BTL or 4 × 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
• Electrostatic discharge protection
• No switch-on/switch-off plop
• Flexible leads
• Low thermal resistance
• Identical inputs (inverting and non-inverting).
TDA8564Q
• Fixed gain
• Diagnostic facility (distortion, short-circuit and
temperature detection)
• Good ripple rejection
• Mode select switch (operating, mute and standby)
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.
• Load dump protection
• AC and DC short-circuit safe to ground and to V
P
• Low power dissipation in any short-circuit condition
• Thermally protected
APPLICATIONS
• The device is primarily developed for car radio
applications.
• Reverse polarity safe
QUICK REFERENCE DATA
SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT
V
I
ORM
I
q(tot)
I
stb
P
operating supply voltage 6.0 14.4 18.0 V
repetitive peak output current − − 4 A
total quiescent current − 80 − mA
standby current − 0.1 100 µA
Stereo BTL application
P
o
output power RL= 4 Ω; THD = 10% − 24 − W
SVRR supply voltage ripple rejection − 41 − dB
V
no
noise output voltage Rs= 0 Ω − 200 − µV
|ZI| input impedance 25 − − kΩ
|∆VO| DC output offset voltage − − 250 mV
Quad single-ended application
P
o
output power RL= 4 Ω; THD = 10% − 6.4 − W
RL= 2 Ω; THD = 10% − 12 − W
SVRR supply voltage ripple rejection − 41 − dB
V
no
noise output voltage Rs= 0 Ω − 200 − µV
|ZI| input impedance 50 − − kΩ
ORDERING INFORMATION
TYPE NUMBER
NAME DESCRIPTION VERSION
PACKAGE
TDA8564Q DBS17P plastic DIL-bent-SIL power package; 17 leads (lead length 12 mm) SOT243-1
February 1995 2
Philips Semiconductors Preliminary specification
Fig.1 Block diagram.
handbook, full pagewidth
mode
select
switch
MLC809
output 1
15 kΩ
15 kΩ
x1
VA
stand-by
switch
V
P
mute
switch
standby
reference
voltage
5
13
V
P1VP2
18 kΩ
180
Ω
180
Ω
180
Ω
180
Ω
mute switch
VA
C
m
power stage
18 kΩ
mute switch
VA
C
m
power stage
6
8
14
18 kΩ
mute switch
VA
C
m
power stage
18 kΩ
mute switch
VA
C
m
power stage
12
10
2 7 11
ground
(signal)
GND1 GND2
power ground (substrate)
output 4
output 3
output 2
non-inverting
input 1
non-inverting
input 4
17
1
TDA8564Q
mute
reference
voltage
input
reference
voltage
60
kΩ
60
kΩ
inverting
input 2
3
PROTECTIONS
thermal
short-circuit
diagnostic
output
16
4
supply voltage
ripple rejection
inverting
input 3
15
60
kΩ
60
kΩ
9
not connected
BLOCK DIAGRAM
2 × 24 W BTL or 4 × 12 W single-ended car
radio power amplifier
TDA8564Q
February 1995 3
Philips Semiconductors Preliminary specification
Fig.2 Pin configuration.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
TDA8564Q
INV1
SGND
INV2
SVRR
OUT1
GND1
OUT2
n.c.
OUT3
GND2
OUT4
V
MODE
INV3
DIAG
INV4
P2
V
P1
MLC810
V
Fig.3 Mode select switch circuitry.
handbook, halfpage
100 kΩ
MGA708
47 µF
10 kΩ 10 kΩ
mode select switch
V
P
2 × 24 W BTL or 4 × 12 W single-ended car
radio power amplifier
PINNING
SYMBOL PIN DESCRIPTION
−INV1 1 non-inverting input 1
SGND 2 signal ground
INV2 3 inverting input 2
SVRR 4 supply voltage ripple rejection
V
P1
OUT1 6 output 1
GND1 7 power ground 1
OUT2 8 output 2
n.c. 9 not connected
OUT3 10 output 3
GND2 11 power ground 2
OUT4 12 output 4
V
P2
MODE 14 mode select switch input
INV3 15 inverting input 3
V
DIAG
−INV4 17 non-inverting input 4
5 supply voltage 1
13 supply voltage 2
16 diagnostic output
TDA8564Q
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.
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 the1⁄2VP decoupling capacitor (pin 4)
to 150 µF to avoid switch plops.
February 1995 4
Philips Semiconductors Preliminary specification
Fig.4 Distortion detector waveform; BTL application.
handbook, halfpage
V
0
V
P
V
O
0
t
MGA705
16
Fig.5 Distortion detector waveform; single-ended
application.
handbook, halfpage
0
V
P
V
O
t
0
MGA706
V
16
Fig.6 Short-circuit waveform.
handbook, full pagewidth
MGA707
short-circuit over the load
20 ms
50 µs
t
t
V
P
current
in
output
stage
V
16
2 × 24 W BTL or 4 × 12 W single-ended car
radio power amplifier
Diagnostic output (pin 16)
DYNAMIC 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).
S
HORT-CIRCUIT PROTECTION
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.
O
PEN-COLLECTOR OUTPUT
Pin 16 is an open-collector output, which allows pin 16 of
more devices being tied together.
February 1995 5
Philips Semiconductors Preliminary specification
Fig.7 Equivalent thermal resistance network;
BTL application.
2.2 K/W
0.2 K/W
2.2 K/W
virtual junction
output 1 output 2
case
MEA861 - 1
Fig.8 Equivalent thermal resistance network;
single-ended application.
handbook, halfpage
3.0 K/W
0.7 K/W
3.0 K/W
virtual junction
output 1 output 2
case
3.0 K/W
0.7 K/W
3.0 K/W
output 3 output 4
MEA860 - 2
0.2 K/W
2 × 24 W BTL or 4 × 12 W single-ended car
radio power amplifier
TDA8564Q
LIMITING VALUES
In accordance with the Absolute Maximum Rating System (IEC 134).
SYMBOL PARAMETER CONDITIONS MIN. MAX. UNIT
V
P
supply voltage
operating − 18 V
non-operating − 30 V
V
V
I
OSM
I
ORM
P
T
T
T
psc
pr
tot
stg
amb
vj
load dump protection during 50 ms; t
AC and DC short-circuit safe voltage − 18 V
reverse polarity − 6 V
non-repetitive peak output current − 6 A
repetitive peak output current − 4 A
total power dissipation − 60 W
storage temperature −55 +150 °C
operating ambient temperature −40 +85 °C
virtual junction temperature − 150 °C
≥ 2.5 ms − 45 V
r
THERMAL CHARACTERISTICS
SYMBOL PARAMETER VALUE UNIT
R
th j-a
R
th j-c
thermal resistance from junction to ambient in free air 40 K/W
thermal resistance from junction to case (see Figs 7 and 8) 1.3 K/W
February 1995 6
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