Gate-drive isolation for 600–1200 V inverter legs
The FOD3150ASD is a single-channel optoisolated gate driver rated for 5000 Vrms isolation. The 3 A peak output drives the gate charge of medium-power IGBTs and MOSFETs, turning them on in 60 ns typical. Its common-mode transient immunity of 20 kV/µs minimum keeps the output state stable when the high-side switch sees a fast voltage step across the isolation barrier — a common failure mode in half-bridge and H-bridge topologies.
Parametric deep-dive: timing and drive strength
Propagation delay is 500 ns max for both tpLH and tpHL, with pulse-width distortion held to 300 ns max. These numbers set the dead-time margin in a phase-leg: a 500 ns propagation delay means the complementary gate signal must be delayed by at least that much plus the 300 ns distortion to avoid shoot-through. Output high/low current is 2 A each, symmetrical. The output supply range of 15 V to 30 V covers standard IGBT gate drive voltages. The LED forward voltage is 1.5 V typical, and the maximum forward current is 25 mA.
Lifecycle and sourcing status
ROHS3 compliant. No stock-holding claim; we quote to order.
Package fit and board layout
8-SMD gull-wing package. The 8-SMD supplier device package footprint matches standard SOIC-8 land patterns. The UL approval simplifies system-level safety certification.