NXP Semiconductors
103
Zth(j-a)
(K/W)
102
duty cycle = 1
0.75
0.5
0.33
0.25
0.2
0.1
0.05
10
0
0.02
0.01
BSS138BKW
60 V, 320 mA N-channel Trench MOSFET
017aaa028
1
10−3
10−2
10−1
1
FR4 PCB, standard footprint
10
102
103
tp (s)
Fig 4. Transient thermal impedance from junction to ambient as a function of pulse duration; typical values
103
Zth(j-a)
(K/W)
102
duty cycle = 1
0.75
0.5
0.33
0.25
0.2
0.1
0.05
017aaa029
0
0.02
10
0.01
1
10−3
10−2
10−1
1
FR4 PCB, mounting pad for drain 1 cm2
10
102
103
tp (s)
Fig 5. Transient thermal impedance from junction to ambient as a function of pulse duration; typical values
BSS138BKW
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 1 — 12 August 2011
© NXP B.V. 2011. All rights reserved.
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