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PDF TDA8560Q Data sheet ( Hoja de datos )
| Número de pieza | TDA8560Q | |
| Descripción | 2 x 40 W/2 ohm stereo BTL car radio power amplifier with diagnostic facility | |
| Fabricantes | NXP Semiconductors | |
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INTEGRATED CIRCUITS
DATA SHEET
TDA8560Q
2 × 40 W/2 Ω stereo BTL car radio
power amplifier with diagnostic
facility
Product specification
Supersedes data of March 1994
File under Integrated Circuits, IC01
1996 Jan 08
1 page  
Philips Semiconductors
2 × 40 W/2 Ω stereo BTL car radio
power amplifier with diagnostic facility
Product specification
TDA8560Q
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 12 is continuously low.
When a short-circuit across the load of one or both
channels occurs the output stages are switched off during
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 12 is low for 20 ms
and high for 50 µs (see Fig.4).
The power dissipation in any short-circuit condition is
very low.
TEMPERATURE DETECTION
When the virtual junction temperature Tvj reaches 150 °C,
pin 12 will become continuously low.
OPEN COLLECTOR OUTPUT
Pin 12 is an open collector output, which allows pin 12 of
more devices being tied together.
handbook, full pagewidthcurrent
in
output
stage
V12
VP
short-circuit over the load
20 ms
50 µs
Fig.4 Short-circuit waveform.
MGA722
t
t
1996 Jan 08
5
5 Page 
Philips Semiconductors
2 × 40 W/2 Ω stereo BTL car radio
power amplifier with diagnostic facility
Product specification
TDA8560Q
handbook, halfpage VP
10 kΩ
47 µF
10 kΩ
mode
select
switch
100 kΩ
MGA708
Diagnostic output
Special care must be taken in the printed-circuit board
layout to separate pin 12 from pin 1 and pin 13, to
minimize the crosstalk between the diagnostic output and
the inputs.
Mode select switch
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).
The circuit in Fig.7 slowly ramps up the voltage at the
mode select switch pin when switching on and results in
fast muting when switching off.
Fig.7 Mode select switch circuitry.
10 2
THD
(%)
10
MGA904
1
(1)
10 1
(2)
(3)
10 2
10 2
(1) f = 10 kHz.
(2) f = 1 Hz.
(3) f = 100 Hz.
10 1
1
10 Po (W)
Fig.8 Total harmonic distortion as a function of output power; VP = 14.4 V; RL = 2 Ω.
1996 Jan 08
11
10 2
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet TDA8560Q.PDF ] | |
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