Philips TDA8581 Datasheet

INTEGRATED CIRCUITS
DATA SH EET
TDA8581
Multi-purpose high-gain power amplifier
Preliminary specification File under Integrated Circuits, IC01
1998 May 27
Philips Semiconductors Preliminary specification
Multi-purpose high-gain power amplifier TDA8581
FEATURES General
High gain
Operating voltage from 8 to 28 V
Low distortion
Few external components, fixed gain
High output power
Can be used as a stereo amplifier in bridge-tied load
(BTL) or quad single-ended (SE) amplifiers
Single-ended mode without loudspeaker capacitor
Mute and standby mode with one- or two-pin operation
Diagnostic information for Dynamic Distortion Detector (DDD), high temperature (145 °C) and short-circuit
No switch on/off plops when switching between
‘standby’ to ‘mute’ and from ‘mute’ to ‘on’
Low offset variation at outputs between ‘mute’ and ‘on’
Fast mute on supply voltage drops.

Protection

Reverse polarity safe (with protection diode added)
Short-circuit proof to ground, positive supply voltage on
all pins and across load
ESD protected on all pins
Thermal protection against temperatures exceeding 150 °C
Load dump protection
Protected against open-circuit ground pins and output
short-circuited to supply ground.

GENERAL DESCRIPTION

The TDA8581 is a stereo bridge-tied load (BTL) or a quad single-ended amplifier that operates over a wide supply voltage range from 8 to 28 V. This makes it suitable for many applications, such as car radios, television and home-sound systems.
Because of an internal voltage buffer, this device can be used without a capacitor connected in series with the load (SE application). A combined BTL and 2 × SE application can also be configured.

ORDERING INFORMATION

TYPE
NUMBER
TDA8581 DBS17P plastic DIL-bent-SIL power package; 17 leads (lead length 12 mm) SOT243-1
NAME DESCRIPTION VERSION
PACKAGE
Philips Semiconductors Preliminary specification
Multi-purpose high-gain power amplifier TDA8581

QUICK REFERENCE DATA

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT
V
P
I
q(tot)
I
stb
G
v
Bridge-tied load application
P
o
THD total harmonic distortion f
V
offset(DC)
V
no
SVRR supply voltage ripple rejection f
operating supply voltage 8.0 28 V total quiescent current VP= 14.4 V 120 140 mA standby supply current VP= 14.4 V 150µA voltage gain single-ended 38 40 42 dB
bridge-tied load 44 46 48 dB
output power THD = 0.5%; VP= 14.4 V;
16 W
RL=4 THD = 0.5%; V
=24V;
P
28 W
RL=8
= 1 kHz; Po=1W;
i
0.05 %
VP= 14.4 V; RL=8 f
= 1 kHz; Po=10W;
i
0.05 %
VP= 24 V; RL=8
DC output offset voltage VP= 14.4 V; ‘mute’
10 20 mV
condition; RL=4 V
= 14.4 V; ‘on’ condition 0 120 mV
P
noise output voltage Rs=1kΩ; VP= 14.4 V 200 320 µV
= 1 kHz; V
i
ripple(p-p)
=2V;
55 −−dB ‘on’ or ‘mute’ condition; Rs=0
Single-ended application
P
o
V
offset(DC)
V
no
output power THD = 0.5%; VP= 14.4 V;
DC output offset voltage VP= 14.4 V; ‘mute’
noise output voltage Rs=1kΩ; VP= 14.4 V 160 280 µV
SVRR supply voltage ripple rejection f
4.2 W
RL=4 THD = 0.5%; V
=24V;
P
13 W
RL=4
10 20 mV
condition; RL=4
= 14.4 V; ‘on’ condition 0 120 mV
V
P
= 1 kHz; V
i
ripple(p-p)
=2V;
42 −−dB ‘on’ or ‘mute’ condition; Rs=0
Philips Semiconductors Preliminary specification
Multi-purpose high-gain power amplifier TDA8581

BLOCK DIAGRAM

V
P1VP2
handbook, full pagewidth
IN1
7
60 k
TDA8581
3
15
V/I
+
45 k
OA
+
1
OUT1+
IN2
IN3
IN5
IN4
MUTE
STANDBY
8
+
60
V/I
k
V
px
30 k
BUFFER
60
10
12
11
13 5
INTERFACE
k
60 k
V
px
45 k
45 k
V/I
+
+
V/I
216
PGND1 PGND2
+
OA
45 k
BUFFER
45 k
OA
+
+
OA
45 k
DIAGNOSTIC
9
14
17
6
MGL141
4
OUT2
BUFFER
OUT3
OUT4+
DIAG
Fig.1 Block diagram.
Philips Semiconductors Preliminary specification
Multi-purpose high-gain power amplifier TDA8581

PINNING

SYMBOL PIN DESCRIPTION
OUT1+ 1 non-inverting output 1 PGND1 2 power ground 1 V
P1
3 supply voltage 1 OUT2 4 inverting output 2 STANDBY 5 ‘standby’/’mute’/’on’ selection DIAG 6 diagnostic output IN1 7 input 1 IN2 8 input 2 BUFFER 9 buffer output
(single-ended output buffer) IN3 10 input 3 IN4 11 input 4 IN5 12 input 5; signal ground capacitor MUTE 13 ‘mute’/’on’ selection OUT3 14 inverting output 3 V
P2
15 supply voltage 2 PGND2 16 power ground 2 OUT4+ 17 non-inverting output 4
handbook, halfpage
STANDBY
OUT1+
PGND1
V
P1
OUT2
DIAG
IN1 IN2
BUFFER
IN3 IN4 IN5
MUTE
OUT3
V
P2
PGND2
OUT4+
1 2 3 4 5 6 7 8
9 10 11 12 13 14 15 16 17
TDA8581
MGL140
Fig.2 Pin configuration.
Philips Semiconductors Preliminary specification
Multi-purpose high-gain power amplifier TDA8581

FUNCTIONAL DESCRIPTION

The TDA8581 is a multi-purpose power amplifier with four amplifiers which can be connected in the following configurations with high output power and low distortion (at minimum quiescent current);
Dual bridge-tied load (BTL) amplifiers
Quad single-ended amplifiers
Dual single-ended amplifiers and one bridge-tied load
amplifier.
The amplifier can be switched on (play or ‘mute’) and off (‘standby’) by the MUTE and STANDBY pins (for interfacing directly with a microcontroller). One-pin operation is also possible by applying a voltage greater than 8 V to the ‘standby’/’mute’/’on’ selection pin (pin 5) to switch the amplifier in ‘on’ mode.
Special attention is given to the dynamic behaviour as follows:
Noise suppression during engine start.
No plops when switching from ‘standby’ to ‘on’.
Slow offset change between ‘mute’ and ‘on’ (controlled
by MUTE and STANDBY pins).
Low noise levels, which are independent of the supply voltage.
Protections are included to avoid the IC being damaged at:
Over temperature: T > 150 °C.
Short-circuit of the output pin(s) to ground or supply rail.
When short-circuited, the power dissipation is limited.
A missing-current limiter which limits the maximum short circuit output current to PGND or V
pins to 1.5 A.
P
The dissipation and speaker current will be minimized because the short-circuited amplifier is switched off. The chip temperature is limited by the temperature protection.
ESD protection (Human Body Model 3000 V, Machine Model 300 V).
Energy handling. A DC voltage of 6 V can be connected to the output of any amplifier while the supply pins are short-circuited to ground. No high DC current will flow from the supply pins of the amplifier.
Reverse battery only with protection diode added.
Diagnostics are available for the following conditions (see Figs 4 to 7):
Amplifier in ‘mute’
Chip temperature greater than 145 °C
Distortion over 2.0% due to clipping
Short-circuit protection active.

LIMITING VALUES

In accordance with the Absolute Maximum Rating System (IEC 134).
SYMBOL PARAMETER CONDITIONS MIN. MAX. UNIT
V
P
supply voltage operating 8 28 V
load dump protected;
45 V
see Fig.3
V
DIAG
I
OSM
I
ORM
V
rev
V
sc
P
tot
T
j
T
stg
T
amb
voltage on diagnostic pin 18 V non-repetitive peak output current 6A repetitive peak output current 4.5 A reverse polarity voltage 6V AC and DC short-circuit voltage of output
pins across loads and to ground or supply pins
no external series resistor in supply line; note 1
24 V
total power dissipation 75 W junction temperature 150 °C storage temperature 55 +150 °C operating ambient temperature 40 +150 °C
Note
1. The maximum supply voltage under short circuit conditions is 28 V with an additional resistor in the supply line of tbf .
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