tda8560q NXP Semiconductors, tda8560q Datasheet - Page 4

• Manufacturer Part Number: tda8560q
• Description: 2 X 40 W/2 Ohm Stereo Btl Car Radio Power Amplifier With Diagnostic Facility
• Manufacturer: NXP Semiconductors

Philips Semiconductors
PINNING
1996 Jan 08
IN 1
GND(S)
V
OUT 1A
GND1
OUT 1B
OUT 2A
GND2
OUT 2B
V
MODE
V
IN 2
P1
P2
DIAG
2 40 W/2
power amplifier with diagnostic facility
SYMBOL
OUT 1B
OUT 2A
GND(S)
OUT 1A
OUT 2B
Fig.2 Pin configuration.
V
MODE
GND1
GND2
DIAG
V P1
V P2
IN 1
IN 2
PIN
stereo BTL car radio
10
12
13
11
1
2
3
4
5
6
7
8
9
10
12
13
11
1
2
3
4
5
9
6
7
8
TDA8560Q
input 1
signal ground
supply voltage 1
output 1A
power ground 1
output 1B
output 2A
power ground 2
output 2B
supply voltage 2
mode switch input
diagnostic output
input 2
MEA855 - 1
DESCRIPTION
4
FUNCTIONAL DESCRIPTION
The TDA8560Q contains two identical amplifiers and can
be used for bridge applications. The gain of each amplifier
is fixed at 40 dB. Special features of the device are as
follows.
Mode select switch (pin 11)
Since this pin has a very low input current ( 40 A), a low
cost supply switch can be applied.
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 pin 1 and pin 13).
This can be achieved by:
Diagnostic output (pin 12)
D
At the onset of clipping of one or more output stages, the
dynamic distortion detector becomes active and pin 12
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 12 is independent of the number of channels that are
clipping (see Fig.3).
handbook, halfpage
YNAMIC DISTORTION DETECTOR
Standby: low supply current ( 100 A)
Mute: input signal suppressed
Operating: normal on condition.
Microprocessor control
External timing circuit (see Fig.7).
Fig.3 Distortion detector waveform.
V O
V
12
V P
0
0
(DDD)
Product specification
TDA8560Q
MGA721
t