ADuM4121

PRODUCTION

High Voltage, Isolated Gate Driver with Internal Miller Clamp, 2 A Output with Thermal Shutdown

Data Sheet (Rev. 0) Product Selection Table
Part Models
6
1ku List Price
Starting From $2.30
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Part Details

  • 2 A peak output current (<2 Ω RDSON)
  • 2.5 V to 6.5 V input 
  • 4.5 V to 35 V output 
  • Undervoltage lockout (UVLO) at 2.5 V VDD1 
  • Multiple UVLO options on VDD2
    • Grade A: 4.4 V (typical) UVLO on VDD2
    • Grade B: 7.3 V (typical) UVLO on VDD2
    • Grade C: 11.3 V (typical) UVLO on VDD2
  • Precise timing characteristics
    • 53 ns maximum isolator and driver propagation delay
  • CMOS input logic levels
  • High junction temperature operation: 125°C
  • High common-mode transient immunity: >150 kV/µs
  • Default low output
  • Internal Miller clamp
  • Safety and regulatory approvals (pending) 
    • UL recognition per UL 1577 
    • 5 kV rms for 1 minute SOIC long package
  • CSA Component Acceptance Notice 5A
  • VDE certificate of conformity (pending)
    • DIN V VDE V 0884-10 (VDE V 0884-10): 2006-12
    • VIORM = 849 V peak
  • Wide body, 8-lead SOIC
ADuM4121
High Voltage, Isolated Gate Driver with Internal Miller Clamp, 2 A Output with Thermal Shutdown
ADuM4121-4121-1 Functional Block Diagram ADuM4121-4121-1 Pin Configuration
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Documentation

Data Sheet 1

User Guide 2

Technical Articles 2

Safety and Regulatory Compliance 1

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Tools & Simulations

LTspice 1

Models for the following parts are available in LTspice:

  • ADUM4121A
  • ADUM4121B
  • ADUM4121C

IBIS Model 1

LTspice

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.

Evaluation Kits

eval board
schematic 1
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schematic 3
EVAL-ADUM4121WHB1Z

Evaluating the ADuM4121 Single-/Dual-Supply, High-Voltage, Isolated SiC Gate Driver with Miller Clamp

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Features and Benefits

  • Optimized for use with Wolfspeed SiC MOSFETs and power modules
  • Compatible with Wolfspeed CIL test boards and half-bridge evaluation boards
  • High-frequency, ultrafast switching operation
  • Input and output side UVLO
  • Shoot-through protection interlock
  • Internal Miller clamp
  • Differential inputs for increased noise immunity
  • Isolated NTC thermistor measurement
  • Onboard 2 W Isolated Power Supplies

Product Details

The EVAL-ADuM4121WHB1Z is a half-bridge gate drive board that allows simple evaluation of the performance of the ADuM4121 when driving advanced Wolfspeed silicon carbide (SiC) metal-oxide semiconductor field-effect transistors (MOSFETs) and power modules. The EVAL-ADuM4121WHB1Z is intended to be used with the Wolfspeed SpeedVal Kit modular evaluation platform and Wolfspeed clamped inductive load (CIL) test boards or with the half-bridge evaluation boards and differential transceiver boards.

The EVAL-ADuM4121WHB1Z has an isolated return channel that is configured to read a negative temperature coefficient (NTC) thermistor and provide a variable frequency output corresponding to the resistance and temperature of the NTC.

The control and input interface for the EVAL-ADuM4121WHB1Z uses RS-422 signaling for improved noise and disturbance immunity and includes a 12 V power input for the EVAL-ADuM4121WHB1Z.

For full details on the ADuM4121, see the ADuM4121 data sheet, which must be consulted when using the EVAL-ADuM4121WHB1Z.

eval board
schematic 4
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schematic 6
EVAL-ADuM4121

ADuM4121/ADuM4121-1 Evaluation Board

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Features and Benefits

  • 2 A peak drive output capability
  • Output power device resistance: <2 Ω
  • Low propagation delay: <51 ns
  • Operating temperature range: −40°C to +125°C
  • Output voltage range to 35 V
  • Output and input undervoltage lockout (UVLO)
  • Pad placement for multiple switch types
  • Screw terminals for easy connectivity

Product Details

The EVAL-ADuM4121EBZ and EVAL-ADuM4121-1EBZ evaluation boards support the ADuM4121/ADuM4121-1 single-channel gate drivers with an integrated miller clamp. Analog Devices, Inc., iCoupler® technology provides isolation between the input signal and the output gate driver. The EVAL-ADuM4121-1EBZ option is populated with the ADuM4121-1 which does not contain an internal thermal shutdown and does not shutdown the output in case of junction temperatures above 155°C (typical).


The ADuM4121 provides operation with voltages of up to 35 V. The integrated miller clamp activates on the falling edge of an edge transition to further clamp the output low to counteract miller turn on effects.


The EVAL-ADuM4121EBZ evaluation board facilitates testing of the propagation delay, drive strength, miller clamp functionality, and input logic of the device.


For complete information about the ADuM4121/ADuM4121-1, refer to the ADuM4121/ADuM4121-1 data sheet that should be consulted in conjunction with user guide UG-1041 when using the evaluation board.
EVAL-ADUM4121WHB1Z
Evaluating the ADuM4121 Single-/Dual-Supply, High-Voltage, Isolated SiC Gate Driver with Miller Clamp
EVAL-ADUM4121WHB1Z Evaluation Board EVAL-ADUM4121WHB1Z Evaluation Board - Top View EVAL-ADUM4121WHB1Z Evaluation Board - Bottom View
EVAL-ADuM4121
ADuM4121/ADuM4121-1 Evaluation Board
EVAL-ADUM4121EBZANGLE-web EVAL-ADUM4121EBZBOTTOM-web EVAL-ADUM4121EBZTOP-web

Latest Discussions

36 Weeks Ago
RE: Driver design for SiC MOSFET Full Bridge Inverter with Vds=100V, can not go higher than Vds=50V (SiC MOSFET rated for 650V)
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