Isolated, Half Bridge Gate Driver with Adjustable Dead Time, Dual Input, 4 A Output

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Part Details
Part Models 6
1ku List Price Starting From $3.28
  • 4 A peak current (<2 Ω RDSON_x)
  • 2.5 V to 6.5 V logic input voltage
  • 4.5 V to 35 V output supply voltage
  • UVLO VDD1 positive going threshold: 2.5 V maximum
  • Multiple UVLO options for VDDA and VDDB positive going threshold
    • Grade A: 4.5 V maximum
    • Grade B: 7.5 V maximum
    • Grade C: 11.6 V maximum
  • Precise timing characteristics
    • 44 ns maximum propagation delay
  • Adjustable dead time and dual input (ADuM4221)
  • Adjustable dead time and single input (ADuM4221-1)
  • No dead time control and dual input (ADuM4221-2)
  • CMOS input logic levels
  • High common-mode transient immunity: 150 kV/µs
  • High junction temperature operation: 125°C
  • Default low output
  • Safety and regulatory approvals (pending)
    • UL recognition per UL 1577
      • 5700 V rms for 1 minute duration
    • CSA Component Acceptance Notice 5A
    • VDE certificate of conformity
      • DIN V VDE V 0884-11: VIORM = 849 V peak
  • Increased creepage wide body, 16-lead SOIC_IC
Additional Details
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The ADuM4221/ADuM4221-1/ADuM4221-2 are 4 A isolated, half bridge gate drivers that employ the Analog Devices, Inc., iCoupler® technology to provide independent and isolated high-side and low-side outputs. The ADuM4221/ADuM4221-1/ADuM4221-2 provide 5700 V rms isolation in an increased creepage wide body, 16-lead SOIC_IC. Combining high speed CMOS and monolithic transformer technology, these isolation components provide outstanding performance characteristics superior to the alternatives, such as the combination of pulse transformers and gate drivers.

The isolators operate with a logic input voltage ranging from 2.5 V to 6.5 V, providing compatibility with lower voltage systems. In comparison to gate drivers employing high voltage level translation methodologies, the ADuM4221/ADuM4221-1/ADuM4221-2 offer the benefit of true, galvanic isolation between the input and each output.

The ADuM4221/ADuM4221-1/ADuM4221-2 each have built in overlap protection and allow dead time adjustment. A single resistor between the dead time pin (DT) and the GND1 pin sets the dead time on the secondary side between the high-side and the low-side outputs.

An internal thermal shutdown (TSD) sets outputs low if the internal temperature on the ADuM4221/ADuM4221-1/ADuM4221-2 exceeds the TSD temperature. As a result, the ADuM4221/ADuM4221-1/ADuM4221-2 provide reliable control over the switching characteristics of the insulated gate bipolar transistor (IGBT)/metal-oxide semiconductor field effect transistor (MOSFET) configurations over a wide range of positive or negative switching voltages.


  • Switching power supplies
  • Isolated IGBT/MOSFET gate drives
  • Industrial inverters
  • Gallium nitride (GaN)/silicon carbide (SiC) compatible

1 Protected by U.S. Patents 5,952,849; 6,873,065; 7,075,239. Other patents pending.

Part Models 6
1ku List Price Starting From $3.28

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Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 1

reference details image


ADuM4221 Evaluation Board



ADuM4221 Evaluation Board

ADuM4221 Evaluation Board

Features and Benefits

  • Adjustable Dead time
  • Output voltage range to 35 V
  • Screw terminals for easy connectivity
  • Pad placement for external series gate resistors
  • Pad placement for capacitive load testing
  • Supports TO-220 or TO-252 IGBTs or MOSFETs
  • Bootstrap option
  • Jumper placement for easy half bridge setup

Product Detail

The EVAL-ADuM4221EBZ supports the ADuM4221 half bridge gate driver that employs Analog Devices, Inc., iCoupler® technology to provide independent and isolated high-side and low-side outputs. The EVAL-ADuM4221EBZ is populated with the ADuM4221, which has VIA and VIB inputs and dead time control. The EVAL-ADuM4221EBZ supplies jumpers and screw terminals to configure different drive conditions. The EVAL-ADuM4221EBZ operates with square waves and dc values on the VIA, VIB, and DISABLE pins.

The ADuM4221 operates with an input supply ranging from 2.5 V to 6.5 V, providing compatibility with lower voltage systems. Logic level voltages at the input pins control the VOA and VOB outputs. The driver has a DISABLE input pin that, if held high, shuts the device off regardless of the input on the channels. In addition to basic overlap protection, the dead time (DT) pin on the primary side allows an adjustable dead time between the VOA and VOB output transitions.

The ADuM4221 provides operation with voltages of up to 35 V on the secondary side. The EVAL-ADuM4221EBZ has a provision for the high-side supply to be bootstrapped to the low-side supply. The EVAL-ADuM4221EBZ facilitates testing of the propagation delay, drive strength, dead time operation, and input logic of the device. Because the EVAL-ADuM4221EBZ has footprints for insulated gate bipolar transistors (IGBTs) and metal-oxide semiconductor field effect transistors (MOSFETs) in TO-220 and TO-252 packages, the ADuM4221 can be evaluated with many different power devices.

For complete information about the ADuM4221, refer to the ADuM4221 data sheet in conjunction with this user guide when using the EVAL-ADuM4221EBZ.

Tools & Simulations

Tools & Simulations 2

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

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