3 A peak gate drive with 5 kV isolation
The onsemi FOD3184TV is a single-channel gate drive optocoupler delivering 3 A peak output current across a 5000 Vrms isolation barrier. This combination suits it for driving IGBTs and MOSFETs in motor drives, inverters, and industrial power supplies where the control side must float cleanly from the high-voltage bus. The 35 kV/µs minimum common-mode transient immunity means the output stays latched in its correct state when the bus voltage slews during a hard-switching event — a figure that matters for inverter legs switching at 10–20 kHz where the dV/dt at the collector can couple back through the parasitic capacitance of the optocoupler.
Switching speed and timing budget
Propagation delay is 210 ns max for both low-to-high and high-to-low transitions, with a pulse-width distortion ceiling of 65 ns. The 38 ns typical rise and 24 ns fall times keep the gate drive edges clean enough for most IGBT modules without external booster stages. The output stage sources and sinks 2.5 A symmetrically, which matches the peak rating of 3 A for the initial gate charge spike. The 15 V to 30 V output supply range covers standard gate drive rails — 15 V for IGBTs, 18 V for some MOSFETs, and 24 V for modules that need a higher gate overdrive.
Package and temperature grade
Housed in an 8-DIP through-hole package (0.300-inch body width), the FOD3184TV suits boards where wave solder is the primary assembly method. Approved under IEC/EN/DIN and UL — the UL recognition covers the 5000 Vrms isolation rating for reinforced insulation in mains-connected equipment.