Philips Semiconductors
PHP/PHB/PHD66NQ03LT
TrenchMOS logic level FET
Product data
Rev. 04 — 9 September 2002
4 of 14
9397 750 10158
Koninklijke Philips Electronics N.V. 2002. All rights reserved.
7.
Thermal characteristics
7.1 Transient thermal impedance
Table 4:
Thermal characteristics
Symbol Parameter
Conditions
Min Typ Max Unit
Rth(j-mb) thermal resistance from junction to mounting base Figure 4 -
1.6
K/W
Rth(j-a)
thermal resistance from junction to ambient
SOT78
vertical in still air
-
60
-
K/W
SOT428
SOT428 minimum footprint;
mounted on a PCB
-
75
-
K/W
SOT404 and SOT428
SOT404 minimum footprint;
mounted on a PCB
-
50
-
K/W
Fig 4.
Transient thermal impedance from junction to mounting base as a function of pulse duration.
03ag18
10-2
10-1
1
10
10-5
10-4
10-3
10-2
10-1
1
10
tp (s)
Zth(j-mb)
(K/W)
single pulse
δ = 0.5
0.2
0.1
0.05
0.02
tp
T
P
t
T
δ =