ADUM3220:  4 A Dual-Channel Gate Driver

The ADuM3220 is a 4 A isolated, dual-channel gate driver based on the Analog Devices, Inc., iCoupler® technology. Combining high speed CMOS and monolithic transformer technology, this isolation component provides outstanding performance characteristics superior to the alternatives, such as the combination of pulse transformers and gate drivers.

The ADuM3220 isolator provides two independent isolation channels. It has a maximum propagation delay of 60 ns and 5 ns channel-to-channel matching. In comparison to gate drivers employing high voltage level translation methodologies, the ADuM3220 offers the benefit of true, galvanic isolation between the input and each output, enabling voltage translation across the isolation barrier. The ADuM3220 has shoot-through protection logic and a default output low characteristic as required for gate drive applications. It operates with an input supply voltage ranging from 3.0 V to 5.5 V, providing compat-ibility with lower voltage systems. The outputs may be operated at supply voltages from 5 V to 18 V, which supports typical gate drive voltages for synchronous dc/dc converters.

The ADuM3220 isolator contains various circuit and layout enhancements to provide increased capability relative to system-level IEC 61000-4-x testing (ESD, burst, and surge). The precise capability in these tests is strongly determined by the design and layout of the user’s board or module. For more information, see the AN-793 Application Note, ESD/Latch-Up Considerations with iCoupler Isolation Products. The ADuM3220 specifies the junction temperature from −40°C to 125°C.

• Isolated synchronous dc/dc converters
• MOSFET/IGBT gate drivers