Philips TDA6107AJF - Thermal Characteristics; 8.1 Thermal Protection

9397 750 14728 © Koninklijke Philips Electronics N.V. 2005. All rights reserved.
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
[1]
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 160120
T
amb
(°C)
mbh989
(1)
(2)
Fig 5. Equivalent thermal resistance network
mgk279
5 K/W
outputs
fin
thermal protection circuit
6 K/W