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TDA1564 датащи(PDF) 8 Page - NXP Semiconductors

номер детали TDA1564
подробное описание детали  High efficiency 2 X 25 W/4 stereo car radio power amplifier
PDF  30 Pages
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производитель  PHILIPS [NXP Semiconductors]
домашняя страница  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

TDA1564 датащи(HTML) 8 Page - NXP Semiconductors

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2004 Jan 27
8
Philips Semiconductors
Preliminary specification
High efficiency 2
× 25 W/4 Ω
stereo car radio power amplifier
TDA1564
Heatsink design
There are two parameters that determine the size of the
heatsink. The first is the rating for the virtual junction
temperature and the second is the ambient temperature at
which the amplifier must still deliver its full power in the
BTL mode.
With a conventional BTL amplifier, the maximum power
dissipation with a music-like signal (at each amplifier) will
be approximately two times 6.5 W. At a virtual junction
temperature of 150
°C and a maximum ambient
temperature of 65
°C, Rth(vj-c) = 1.3 K/W and
Rth(c-h) = 0.2 K/W, the thermal resistance of the heatsink
should be:
Compared to a conventional BTL amplifier, the TDA1564
has a higher efficiency. The thermal resistance of the
heatsink should be:
150
65
–
2
6.5
×
----------------------
1.3
–
0.2
–
5 K/W
=
1.7
145
65
–
2
6.5
×
----------------------

 1.3
–
0.2
–
9 K/W
=
Fig.5 Thermal equivalent resistance network.
handbook, halfpage
3.6 K/W
0.6 K/W
3.6 K/W
virtual junction
OUT 1
OUT 1
case
3.6 K/W
0.6 K/W
3.6 K/W
OUT 2
OUT 2
MGC424
0.1 K/W



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