PHP55N03LTA Datasheet, PDF (4/14 Pages) NXP Semiconductors – N-channel enhancement mode field-effect transistor

Philips Semiconductors
PHP55N03LTA series
N-channel enhancement mode field-effect transistor
7. Thermal characteristics
Table 4: Thermal characteristics
Symbol Parameter
R_th(j-mb) thermal resistance from junction to mounting
base
R_th(j-a) thermal resistance from junction to ambient
Conditions
Figure 4
vertical in still air; SOT78 package
mounted on a printed circuit board; minimum
footprint; SOT404 and SOT428 packages
7.1 Transient thermal impedance
Value Unit
1.75 K/W
60 K/W
50 K/W
10
Z_th(j-mb)
(K/W)
1
δ = 0.5
0.2
0.1
10-1 0.05
0.02
10-2
10-5
single pulse
10-4
10-3
10-2
03ae63
P
δ
=
tp
T
10-1
tp
T
t_p (s)
t
1
Fig 4. Transient thermal impedance from junction to mounting base as a function of pulse duration.
9397 750 08642
Product data
Rev. 02 — 2 August 2001
© Koninklijke Philips Electronics N.V. 2001. All rights reserved.
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