Isolated gate driver for half-bridge and full-bridge power stages
The ADUM7223BCCZ is a dual-channel isolated gate driver from Analog Devices' iCoupler series, built around magnetic coupling technology. Two channels in a single 13-LGA package let you drive the high-side and low-side switches of a half-bridge with one IC, saving board area versus two single-channel isolators. The 62ns max propagation delay is matched between channels, which simplifies dead-time calculation — you budget the same delay on both legs. The 50kV/µs common-mode transient immunity rating means this part holds its output state through the fast voltage slew that appears across the isolation barrier during hard-switching events. That is the spec that keeps the gate drive from glitching when the half-bridge midpoint swings几百 volts in tens of nanoseconds.
Peak output current of 4A determines how fast the gate of the external power switch charges and discharges. The 12ns typical rise/fall time at the isolator output confirms the drive stage is capable of clean edges into moderate capacitive loads. The output supply range of 4.5V to 18V covers both standard 12V gate drives for MOSFETs and the 15V rails common for IGBT gate drivers. If you are driving logic-level MOSFETs at 5V, the lower end of the range still works — just watch the dropout margin against the supply tolerance.
Package and thermal considerations for the 13-LGA
The 13-VFLGA package measures 5x5 mm — small enough for compact power-stage PCBs but requiring careful solder-paste stencil design to avoid bridging. Surface-mount assembly is standard, but the LGA has no exposed thermal pad; all heat dissipates through the package body and the solder joints to the board. The 125°C junction limit means the part can run at full rated isolation and drive current across that range as long as board temperature stays within bounds.