ADUM3220WBRZ

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The ADUM3220WBRZ Isolator-Gate Drivers enable simpler, smaller, and more efficient design with an integrated isolation barrier. This gate driver can be used to drive MOSFETs, IGBTs, and other derivative ICs. It works with standard logic levels, including 3.3/5 V CMOS/TTL logic. The device features a 3.75 kV RMS isolation barrier and a low operating current of 3 µA maximum at comparable isolation levels. It also features an adaptive reset time, enhanced rise and fall times, and dynamic off-time control.

The ADUM3220WBRZ has a wide range of applications, especially in power isolation devices. Isolation is an effective way to provide galvanic isolation between two systems without contact, enabling greater design flexibility and improved safety and reliability. It is also used in applications where there are high switching frequencies but low power requirements. In addition, it has been used in high data rate signal transmission, motor control, and in AC/DC and DC-to-DC isolation. Other application fields include power converters, Hi-Rel applications in military and aerospace systems, power supplies, motor drives, and industrial automation.

The working principle of the ADUM3220WBRZ is based on the phenomenon of capacitive coupling. The two isolators are connected together by two series-resonant capacitors and inductors, both of which are used to store energy. The capacitance between them forms an electric field that is responsible for the transfer of the logic signal from one side to the other. As a result, despite the lack of direct electrical connection, the behaviour of the two systems seems to be synchronous.

The ADUM3220WBRZ also implements features like input and output clamping, slew rate control, dynamic off-time modulation, and an adaptive reset time. This makes it ideal for driving large capacitive loads and high switching frequencies. Additionally, the device provides a wide voltage operating range from 5V to 26.4V and an insulation voltage rating of up to 3.75 kV RMS.

In conclusion, the ADUM3220WBRZ Isolator-Gate Drivers offer a wide range of features and applications for isolating gate drivers. Its integrated isolation barrier eliminates the need for external isolation components and provides low operating current at comparable levels of insulation. It features input and output clamping, dynamic off-time control, and an adaptive reset time, making it perfect for switching large capacitive loads and operating at high switching frequencies. It also offers a wide range of applications for isolating gate drivers, such as power isolation, Hi-Rel applications in military and aerospace systems, and power supplies.

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