SI9945DY Datasheet, PDF (2/3 Pages) Fairchild Semiconductor – Dual N-Channel Enhancement Mode MOSFET

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Notes:
1. R_θJA is the sum of the junction-to-case and case-to-ambient resistance where the case thermal reference is defined as the solder mounting surface of
the drain pins. R_θJC is guaranteed by design while R_θJA is determined by the user's board design.
a) 78° C/W when
mounted on a 0.5 in²
pad of 2 oz. copper.
b) 125° C/W when
mounted on a 0.02 in²
pad of 2 oz. copper.
c) 135° C/W when
mounted on a 0.003 in²
pad of 2 oz. copper.
Scale 1 : 1 on letter size paper
2. Pulse Test: Pulse Width ≤ 300 µs, Duty Cycle ≤ 2.0%
Si9945DY Rev. A