SiC MOSFET gate driver supports hundreds of kW without a booster

February 27, 2019 //By Nick Flaherty
SiC MOSFET gate driver supports hundreds of kW without a booster
Power Integrations has launched a single-channel SiC MOSFET gate driver that delivers the highest peak output gate current available without an external boost stage.

Devices can be configured to support different gate-drive voltage requirements matching the range of requirements seen in SiC MOSFETs today and include advanced safety features making them both compact and robust. Key applications include UPS, photovoltaic systems, servo drives, welding inverters and power supplies.

The SCALE-iDriver SIC1182K offers up to 8 A output at a junction temperature of 125°C allowing these devices to support SiC-MOSFET inverter designs up to several hundred kilowatts without a booster stage. This results in high system efficiency and enables customers to produce only one design to cover their entire product portfolio of differently-rated power inverters. A switching frequency of up to 150 kHz supports multiple applications.

The gate drivers use PI's high speed communications FluxLink technology, dramatically improving isolation capability. This replaces optocouplers and capacitive or silicon-based solutions, significantly improving reliability and delivers reinforced isolation up to 1200 V. SCALE-iDriver devices also include system-critical protection features such as desaturation monitoring and current SENSE read out, primary and secondary undervoltage lock-out (UVLO) and Advanced Active Clamping (AAC). More, the protection circuits provide safe shut down within 5 microseconds, meeting the fast protection needs of SiC devices.SIC1182K SiC gate drivers exhibit high external magnetic field immunity, featuring a package that provides ≥9.5 mm of creepage and clearance, using material that has the highest CTI level, CTI600, to IEC60112.

“Silicon Carbide MOSFET technology opens the door for decreasing size, lower weight and reduced losses in power inverter systems. The SCALE-iDriver family pairing with FluxLink technology enables safe, cost-effective designs for inverters with very few external components up to 100 kW, ensuring functional safety as well as compact packaging and maximized efficiency," said Michael Hornkamp, senior director of marketing for gate-driver products at Power Integrations.

The SCALE-iDriver technology minimizes the number of external components that are needed and reduces the bill of materials as tantalum or electrolytic capacitors are not required and only one secondary winding is needed. THis means a two-layer-PCB can be used which increases design simplicity, cuts


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