Features and Benefits

  • 4 A peak drive output capability
  • Output power device resistance: <1 Ω
  • Desaturation protection
    • Isolated desaturation fault reporting
    • Soft shutdown on fault
  • Miller clamp output with gate sense input
  • Isolated fault and ready functions
  • Low propagation delay: 75 ns typical
  • Minimum pulse width: 50 ns
  • Operating temperature range: −40°C to +125°C
  • Output voltage range up to 35 V
  • Input voltage range from 2.5 V to 6 V
  • Output and input UVLO
  • Creepage distance: 8 mm minimum
  • 100 kV/μs CMTI
  • 20 year lifetime for TBD V rms or TBD V dc working voltage
  • Safety and regulatory approvals (pending)
    • TBD kV ac for 1 minute per UL 1577
    • CSA Component Acceptance Notice 5A
    • DIN V VDE V 0884-11
      • VIORM = 1500 V (TBD) peak (reinforced/basic)

Product Details

The ADuM4146 is a single-channel gate driver specifically optimized for driving silicon carbide (SiC) metal-oxide semiconductor field effect transistors (MOSFETs). Analog Devices, Inc., iCoupler® technology provides isolation between the input signal and the output gate drive.

The ADuM4146 includes a Miller clamp to provide robust SiC turn off with a single-rail supply when the gate voltage drops below 2 V. Operation with unipolar or bipolar secondary supplies is possible with or without the Miller clamp operation.

The Analog Devices chip scale transformers also provide isolated communication of control information between the high voltage and low voltage domains of the chip. Information on the status of the chip can be read back from dedicated outputs. Control of resetting the device after a fault on the secondary side is performed on the primary side of the device.

Integrated onto the ADuM4146 is a desaturation detection circuit that provides protection against high voltage short-circuit SiC operation. The desaturation protection contains noise reducing features, such as a 300 ns masking time after a switching event to mask voltage spikes due to initial turn on. An internal 500 μA current source allows low device count, and the internal blanking switch allows the addition of an external current source if more noise immunity is needed.

The secondary undervoltage lockout (UVLO) is set to 11.5 V with common SiC levels taken into consideration.


  • SiC/MOSFET/IGBT gate drivers PV inverters
  • Motor drives
  • Power supplies

Product Lifecycle icon-recommended Pre-Release

This product is new and engineering validation may still be underway. Quantities may be limited and design specifications may change while we ready the product for release to production.

Evaluation Kits (1)

Design Resources

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.

Support & Discussions

ADUM4146 Discussions

RE: ADuM4146 LTspice
11 week(s) ago in Isolated Gate Drive &amp; Sense Signal Chains

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The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

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Evaluation Boards Pricing displayed is based on 1-piece.
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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.