TDA8562Q Просмотр технического описания (PDF) - Philips Electronics
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TDA8562Q
Philips Electronics
TDA8562Q Datasheet PDF : 16 Pages
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Philips Semiconductors
4 x 12 W single-ended car radio power amplifier with
dynamic distortion detector and diagnostic interface
Product specification
TDA8562Q
PINNING
SYMBOL
IN 1
GND(S)
IN 2
RR
VP1
OUT 1
GND1
OUT 2
n.c.
OUT 3
GND2
OUT 4
VP2
MODE
IN 3
VDIAG
IN 4
PIN
DESCRIPTION
1 input 1
2 signal ground
3 input 2
4 supply voltage ripple rejection
5 supply voltage
6 output 1
7 power ground 1
8 output 2
9 not connected
10 output 3
11 power ground 2
12 output 4
13 supply voltage
14 mode select switch input
15 input 3
16 diagnostic output
17 input 4
The device is primarily developed for car radio
applications.
FUNCTIONAL DESCRIPTION
The TDA8562Q contains four identical amplifiers and can
be used for single-ended applications. The gain of each
amplifier is fixed at 20 dB. Special features of the device
are:
Mode select switch (pin 14)
• low stand-by current (< 100 µA)
• low switching current (low cost supply switch)
• mute facility
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, 3, 15 and pin 17).
This can be achieved by:
• microprocessor control
• external timing circuit (see Fig.7)
handbook, halfpage
IN 1 1
GND(S) 2
IN 2 3
RR 4
V P1 5
OUT 1 6
GND1 7
OUTP 2 8
n.c. 9 TDA8562Q
OUT 3 10
GND2 11
OUTP 4 12
V P2 13
MODE 14
IN 3 15
V DIAG 16
IN 4 17
MEA866 - 1
Fig.2 Pin configuration.
Diagnostic output (pin 16)
DYNAMIC DISTORTION DETECTOR (DDD)
At the onset of clipping of one or more output stages, the
dynamic distortion detector becomes active and pin 16
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
16 is independent of the number of channels that are
clipping (see Fig.3).
July 1994
4
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