Thermal characteristics, 1 thermal protection, Tda6107ajf – Philips TDA6107AJF User Manual
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Product data sheet
Rev. 02 — 28 April 2005
5 of 16
Philips Semiconductors
TDA6107AJF
Triple video output amplifier
8.
Thermal characteristics
[1]
An external heatsink is necessary; see
Application Note AN10227-01
.
8.1 Thermal protection
The internal thermal protection circuit gives a decrease of the slew rate at high
temperatures: 10 % decrease at 130
°
C and 30 % decrease at 145
°
C (typical values on
the spot of the thermal protection circuit).
Table 4:
Thermal characteristics
Symbol
Parameter
Conditions
Typ
Unit
R
th(j-a)
thermal resistance from junction to ambient in free air
56
K/W
R
th(j-fin)
thermal resistance from junction to fin
11
K/W
(1) Infinite heatsink.
(2) No heatsink.
Fig 4.
Power derating curves
P
tot
(W)
8
6
2
0
4
−
40
0
40
80
160
120
T
amb
(
°
C)
mbh989
(1)
(2)
Fig 5.
Equivalent thermal resistance network
mgk279
5 K/W
outputs
fin
thermal protection circuit
6 K/W