Analog DevicesADUM4146CRWZPilotes de porte et de puissance

ADuM4146: An Isolated SiC Gate Driver that’s Optimized for High Performance

The Analog Devices ADuM4146 is an isolated SiC gate driver with integrated Miller clamp. This single-channel gate driver is optimized for driving silicon carbide (SiC) metal-oxide semiconductor field effect transistors (MOSFETs) and allows for unipolar or bipolar operation. The iCoupler® technology provides isolation between the input signal and the output gate drive.

Integrated onto the ADuM4146 is a desaturation detection circuit that provides protection against high voltage short-circuit SiC operation. The internal blanking switch allows for the addition of an external current source if more noise immunity is needed. The secondary undervoltage lockout (UVLO) is set for common SiC levels. The integrated Miller clamp allows for the full utilization of SiC’s faster switching speeds by preventing the Miller effect induced turn-on.

The ADuM4146’s industry-leading common-mode transient immunity (CMTI) assures that no gate timing errors will occur during this fast switching. Faster switching, without any dV/dt induced shootthrough or timing errors, increases the power converter’s efficiency.

Key Features and Benefits

• Industry’s fastest short-circuit protection (SCP) response time
• Improved DESAT blanking and noise response
• DESAT fault reporting and soft shutdown

Applications

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