800 V N-channel MOSFET in DPAK — the switching workhorse
The STD6N80K5 is an 800 V N-channel MOSFET from ST's SuperMESH5™ series, used in offline power supplies, LED lighting drivers, and auxiliary converters.
1.6 Ohm on-resistance — conduction loss budget
Gate charge and input capacitance — drive requirements
Total gate charge is 7.5 nC at 10 V, and input capacitance is 255 pF at 100 V drain-source.
Temperature range and package — bench-fit check
The DPAK (TO-252) surface-mount package has a metal tab that can be soldered to a board copper area for heatsinking — no separate heatsink needed at moderate power levels. The 30 V maximum gate-source rating gives margin against ringing on the gate node in a hard-switched topology.