Isolated gate driver for power-switch drive — ADUM3220ARZ-RL7
The ADUM3220ARZ-RL7 from Analog Devices is a dual-channel isolated gate driver based on the iCoupler magnetic coupling technology. It delivers 4A peak output current with 2500Vrms isolation between input and each output channel, making it a direct fit for driving IGBTs and MOSFETs in motor drives, switch-mode power supplies, and inverter stages where galvanic isolation is required between the controller and the power stage. The 8-SOIC package keeps the footprint small for dense PCB layouts, and the -40°C to 125°C temperature range covers industrial and automotive under-hood environments without derating.
60ns propagation delay and 25kV/µs CMTI — timing and noise margin
Propagation delay is symmetrical at 60ns max for both rising and falling edges, which simplifies dead-time programming in half-bridge and full-bridge topologies. The 20ns rise/fall time ensures fast gate charging, reducing switching losses. Common-mode transient immunity of 25kV/µs means the driver holds its output state during high dV/dt events on the isolated side — critical in hard-switched converters where the high-side reference can swing hundreds of volts in nanoseconds.
Supply range and approvals — 4.5V to 18V output supply
The output supply range of 4.5V to 18V covers standard gate-drive voltages for both logic-level MOSFETs (5V to 10V) and IGBTs (15V). The part carries CSA, UR, and VDE safety approvals, which simplifies system-level certification for industrial and medical equipment.