TDA8561Q datasheet(5/24 Pages) PHILIPS

Teilenummer	TDA8561Q

Bauteilbeschribung	2 x 24 W BTL or 4 x 12 W single-ended car radio power amplifier

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Hersteller	PHILIPS [NXP Semiconductors]

Direct Link	http://www.nxp.com

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5 / 24 page

1999 Jun 30

5

Philips Semiconductors

Product speciﬁcation

2

× 24 W BTL or 4 × 12 W single-ended

car radio power ampliﬁer

TDA8561Q

FUNCTIONAL DESCRIPTION

The TDA8561Q contains four identical amplifiers and can

be used for Single-Ended (SE) or Bridge-Tied Load (BTL)

applications. The gain of each amplifier is fixed at 20 dB

(26 dB in BTL). Special features of the device are:

Mode select switch (pin 14)

• Low standby 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 pins 1, 3, 15 and 17). This can be achieved

by:

• Microcontroller control

• External timing circuit (see Fig.11).

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 Figs 3 and 4).

SHORT-CIRCUIT PROTECTION

When a short-circuit occurs at one or more outputs to

ground or to the supply voltage, the output stages are

switched off until the short-circuit is removed and the

device is switched on again, with a delay of approximately

20 ms, after removal of the short-circuit. During this

short-circuit condition, pin 16 is continuously LOW.

When a short-circuit across the load of one or both

channels occurs the output stages are switched off for

approximately 20 ms. After that time it is checked during

approximately 50

µs to see whether the short-circuit is still

present. Due to this duty cycle of 50

µs/20 ms the average

current consumption during this short-circuit condition is

very low (approximately 40 mA).

During this short-circuit condition, pin 16 is LOW for 20 ms

and HIGH for 50

µs (see Fig.5).

The power dissipation in any short-circuit condition is very

low.

Fig.3

Distortion detector waveform; BTL

application.

handbook, halfpage

V

0

VP

VO

0

t

MGA705

16

Fig.4

Distortion detector waveform; single-ended

application.

handbook, halfpage

0

VP

VO

t

0

MGA706

V16

Ähnliche Beschreibung - TDA8561Q

Hersteller	Teilenummer	Datenblatt	Bauteilbeschribung
NXP Semiconductors	TDA8564Q	81Kb / 15P	2 x 24 W BTL or 4 x 12 W single-ended car radio power amplifier February 1995
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	TDA1516BQ	95Kb / 11P	24 W BTL or 2 x 12 watt stereo car radio power amplifier July 1994
	TDA1518BQ	80Kb / 11P	24 W BTL or 2 x 12 watt stereo car radio power amplifier July 1994
	TDA1519B	118Kb / 12P	12 W BTL or 2 x 6 W stereo car radio power amplifier May 1992
	TDA1558Q	100Kb / 11P	2 x 22 W or 4 x 11 W single-ended car radio power amplifier May 1992
	TDA8561Q	133Kb / 24P	2 X24 W BTL or 4 X12 W single-ended car radio power amplifier 1999 Jun 30
	TDA1519A	141Kb / 14P	22 W BTL or 2 x 11 W stereo car radio power amplifier May 1992
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