TDA8581 View Datasheet(PDF) - Philips Electronics
Part Name
Description
Manufacturer
TDA8581 Datasheet PDF : 20 Pages
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Philips Semiconductors
Multi-purpose high-gain power amplifier
Preliminary specification
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 VP pins to 1.5 A.
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
VP
VDIAG
IOSM
IORM
Vrev
Vsc
Ptot
Tj
Tstg
Tamb
supply voltage
operating
8
load dump protected;
−
see Fig.3
voltage on diagnostic pin
−
non-repetitive peak output current
−
repetitive peak output current
−
reverse polarity voltage
−
AC and DC short-circuit voltage of output no external series
−
pins across loads and to ground or supply resistor in supply line;
pins
note 1
total power dissipation
−
junction temperature
−
storage temperature
−55
operating ambient temperature
−40
28
V
45
V
18
V
6
A
4.5
A
6
V
24
V
75
W
150
°C
+150
°C
+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 Ω.
1998 May 27
6
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