TDA8580 Datasheet, PDF (6/20 Pages) NXP Semiconductors – Multi-purpose power amplifier

Philips Semiconductors
Multi-purpose power amplifier
Preliminary specification
TDA8580
FUNCTIONAL DESCRIPTION
The TDA8580 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_P pins to 1 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.
Diagnostics are available for the following conditions
(see Figs 4 to 7).
• Amplifier in ‘mute’
• Chip temperature greater than 145 °C
• Distortion over 2% 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
V_DIAG
I_OSM
I_ORM
V_rev
V_sc
P_tot
T_j
T_stg
T_amb
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 Feb 25
6