TDA1560 Philips Semiconductors, TDA1560 Datasheet - Page 6

• Manufacturer Part Number: TDA1560
• Description: 40 W car radio high power amplifier
• Manufacturer: Philips Semiconductors

Philips Semiconductors
LIMITING VALUES
In accordance with the Absolute Maximum Rating System (IEC 134).
THERMAL CHARACTERISTICS
Heatsink design
There are two parameters that determine the size of the
heatsink. The first is the rating for the case temperature
and the second is the ambient temperature at which the
amplifier must still deliver its full power in the class-H
mode.
E
With an 8
maximum power dissipation is approximately 6.5 W. If the
amplifier is to deliver its full power at ambient temperatures
up to 50 C the case temperature should not be higher
than120 C for class-H operation.
R
In this example and with an 8
heatsink is determined by the rating for the maximum full
power ambient temperature. If the case temperature of the
device exceeds 120 C then the device switches back to
class-B, see “Example 2”.
1996 May 14
120 50
--------------------- - 1.0
V
I
I
V
E
I
P
T
T
R
R
OSM
ORM
17
XAMPLE
th case-h
stg
amb
P
P(sc)
cap
tot
SYMBOL
SYMBOL
th j-a
th j-case
40 W car radio high power amplifier
6.5
–
= 1 K/W, thus the external heatsink should be:
1
–
load and driven with a music signal, the
thermal resistance from junction to ambient in free air
thermal resistance from junction to case (measured in Fig.6)
supply voltage
non-repetitive peak output current
repetitive peak output current
AC and DC short-circuit safe voltage
energy handling capability at outputs V
current at pin 17
total power dissipation
storage temperature
operating ambient temperature
=
10 K/W
PARAMETER
load, the size of the
PARAMETER
operating
non-operating
load dump protection; t
V
P
17
= 0
< V
6
P
E
With disabled class-H mode, an 8
a sine wave signal the maximum power dissipation is
approximately 5 W. At a virtual junction temperature of
150 C and T
R
should be:
In this example the size of the heatsink is determined by
the virtual junction temperature.
150 60
--------------------- - 3 1
XAMPLE
th case-h
CONDITIONS
1
5
–
= 1 K/W the thermal resistance of the heatsink
2
–
–
amb(max)
r
=
2.5 ms
14 K/W
at 60 C, R
55
40
MIN.
VALUE
40
th vj-case
3
load and driven with
Product specification
18
30
45
6
4
18
200
5
60
+150
TDA1560Q
MAX.
= 3 K/W and
UNIT
K/W
K/W
V
V
V
A
A
V
mJ
mA
W
C
C
UNIT