TDA8560Q Datasheet, PDF (4/16 Pages) NXP Semiconductors – 2 x 40 W/2 ohm stereo BTL car radio power amplifier with diagnostic facility

Philips Semiconductors
2 × 40 W/2 Ω stereo BTL car radio
power amplifier with diagnostic facility
Product specification
TDA8560Q
PINNING
SYMBOL
IN 1
GND(S)
V_P1
OUT 1A
GND1
OUT 1B
OUT 2A
GND2
OUT 2B
V_P2
MODE
V_DIAG
IN 2
PIN
DESCRIPTION
1
input 1
2
signal ground
3
supply voltage 1
4
output 1A
5
power ground 1
6
output 1B
7
output 2A
8
power ground 2
9
output 2B
10 supply voltage 2
11 mode switch input
12 diagnostic output
13 input 2
IN 1 1
GND(S) 2
V _{P1 3}
OUT 1A 4
GND1 5
OUT 1B 6
OUT 2A 7 TDA8560Q
GND2 8
OUT 2B 9
VP2 10
MODE 11
V _{DIAG 12}
IN 2 13
MEA855 - 1
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)
• Standby: low supply current (<100 µA)
• Mute: input signal suppressed
• Operating: normal on condition.
Since this pin has a very low input current (<40 µA), 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:
• Microprocessor control
• External timing circuit (see Fig.7).
Diagnostic output (pin 12)
DYNAMIC DISTORTION DETECTOR (DDD)
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, halfpageVO
0
V12
VP
0
MGA721
t
Fig.2 Pin configuration.
1996 Jan 08
Fig.3 Distortion detector waveform.
4