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ANALOG DEVICES INC. ADuM4221 Isolated Half Bridge Gate Drivers | New Product Brief

November 28, 2020 by Mouser Electronics

This New Product Brief (NPB) is part of a video series highlighting the features, applications, and technical specs of newly-released products.

ANALOG DEVICES INC. ADuM4221 Isolated Half Bridge Gate Drivers

Analog Devices’ ADuM4221 isolated half-bridge gate driver provides true galvanic isolation between the input and each output and simplifies the implementation of switching power supplies, industrial inverters, and other half-bridge applications. 

The ADuM4221 uses ADI’s iCoupler chip-scale transformer technology to provide 5700VRMS isolation and precise timing. The logic input side accepts CMOS inputs and operates from a 2.5V to 6.5V supply for compatibility with lower voltage systems, while the output supply voltage ranges from 4.5V to 35V. The drivers can output a 4A peak current and have built-in overlap protection as well as adjustable dead time control. 

The ADuM4221 has integrated thermal shutdown and undervoltage lockout protections, and is housed in a wide body SOIC package with increased creepage. 

  • True galvanic isolation between the input and each output 
    • UL1577 recognized: 5700 VRMS, 1 minute 
  • Logic input voltage: 2.5V to 6.5V 
    • CMOS input logic levels 
    • Compatible with low voltage systems 
  • Output supply voltage: 4.5V to 35V 
  • Gate drive current: 4A peak (<2Ω RDSON_x) 
    • Built-in overlap protection 
    • Adjustable dead time 
  • Protections: UVLO, Thermal Shutdown 
    • Logic side positive going threshold: 2.5V maximum 
    • Output supply positive going threshold: 4.5V, 7.5V, or 11.6V maximum 
  • Package: Increased creepage wide body, 16-lead SOIC_IC 
    • Creepage: 8.3mm 
    • Clearance: 8.3mm 

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