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BC639-16 Scheda tecnica(PDF) 7 Page - NXP Semiconductors |
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BC639-16 Scheda tecnica(HTML) 7 Page - NXP Semiconductors |
7 / 15 page BC639_BCP56_BCX56_8 © NXP B.V. 2007. All rights reserved. Product data sheet Rev. 08 — 22 June 2007 7 of 15 NXP Semiconductors BC639; BCP56; BCX56 80 V, 1 A NPN medium power transistors FR4 PCB, standard footprint Fig 5. Transient thermal impedance from junction to ambient as a function of pulse duration for SOT223; typical values FR4 PCB, mounting pad for collector 1 cm2 Fig 6. Transient thermal impedance from junction to ambient as a function of pulse duration for SOT223; typical values 006aaa814 10 1 102 103 Zth(j-a) (K/W) 10−1 10−5 10 10−2 10−4 102 10−1 tp (s) 10−3 103 1 duty cycle = 0.01 0 0.02 0.05 0.1 0.2 0.33 0.5 0.75 1.0 006aaa089 10−5 10 10−2 10−4 102 10−1 tp (s) 10−3 103 1 102 10 103 Zth(j-a) (K/W) 1 0 duty cycle = 1 0.75 0.5 0.33 0.2 0.1 0.05 0.02 0.01 |
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