TDA8566 NXP Semiconductors, TDA8566 Datasheet - Page 6

• Manufacturer Part Number: TDA8566
• Description: The TDA8566 is an integrated class-B output amplifier which is available in severalpackages
• Manufacturer: NXP Semiconductors

NXP Semiconductors
7. Functional description
TDA8566_6
Product data sheet
7.1 Mode select switch (pin MODE)
7.2 Clip detection (pin CLIP)
Table 4.
The TDA8566 contains 2 identical amplifiers and can be used for BTL applications. The
gain of each amplifier is fixed at 26 dB. Special features of this device are:
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 advisable to keep the amplifier in the mute mode for
a period of
This can be realized by using a microcontroller or by using an external timing circuit as
illustrated in
When clipping occurs at one or more output stages, the dynamic distortion detector
becomes active and pin CLIP goes LOW. This information can be used to drive a sound
processor or a DC volume control to attenuate the input signal and so limit the level of
distortion. The output level of pin CLIP is independent of the number of channels that are
being clipped. The clip detection circuit is disabled in a short-circuit condition, so if a fault
condition occurs at the outputs, pin CLIP will remain at a HIGH level. The clip detection
waveforms are illustrated in
Symbol
OUT2+
PGND2
OUT2
V
MODE
DIAG
IN2+
IN2
•
•
•
•
•
•
•
•
•
P2
Mode select switch
Clip detection
Short-circuit diagnostic
Temperature pre-warning
Open-collector diagnostic outputs
Differential inputs
Standby: low supply current
Mute: input signal suppressed
Operating: normal on condition
Pin description TDA8566Q
Figure
Pin
10
11
12
13
14
15
16
17
150 ms (charging the input capacitors at pins IN1+, IN1 , IN2+ and IN2 ).
8.
Rev. 06 — 15 October 2007
Description
channel 2 output positive
power ground 2
channel 2 output negative
supply voltage 2
mode select switch input (standby/mute/operating)
short-circuit and temperature pre-warning diagnostic output
channel 2 input positive
channel 2 input negative
Figure
5.
2
…continued
40 W/2
stereo BTL car radio power amplifier
TDA8566
© NXP B.V. 2007. All rights reserved.
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