Qorvo delivers 5.4mΩ 750V SiC FETs in TOLL package for high power applications

This is the first product in a family of 750V SiC FETs that will be released in the TOLL package with on-resistance ranging from 5.4mΩ to 60mΩ. These devices are ideal for use in space-constrained applications such as AC/DC power supplies ranging from several 100s of watts to multiple kilowatts, as well as solid-state relays and circuit breakers up to 100A.

In the 600/750V class of power FETs, Qorvo Gen 4 SiC FETs offer unmatched performance across the main figures of merit for on-resistance and output capacitance. Additionally, in the TOLL package, at 5.4mΩ the devices have 4-10x lower on-resistance than competing best-in-class Si MOSFETs, SiC MOSFETs and GaN transistors. The 750V rating of the SiC FETs is also 100-150 volts higher than the alternative technologies, providing a significantly enhanced design margin for managing voltage transients.

Anup Bhalla, chief engineer for Qorvo’s Power Devices business, said, “The launch of our 5.4mΩ Gen4 SiC FETs in TOLL packaging is an important step in our goal of providing designers with the industry's best performance and multiple device options. Customers working on industrial applications in particular need this combination of flexibility and cost-efficient power design.”

The TOLL package is 30% smaller in footprint and at 2.3mm half the height of comparable alternative D2PAK surface-mount offerings. Despite the size reduction, advanced manufacturing techniques achieve an industry-leading 0.1°C/W thermal resistance from junction to case. The DC current rating is 120A up to case temperatures of 144°C, while the pulsed current rating is 588A up to 0.5 millisecond. Combined with the ultra-low on-resistance and excellent transient thermal behavior, this yields an ‘I2t’ rating around 8x better than a Si MOSFET in the same package, aiding robustness and immunity to transient overloads, while also simplifying the design. A Kelvin source connection is also provided in the TOLL package for reliable high-speed switching.

These Gen4 SiC FETs leverage Qorvo’s unique cascode circuit configuration, in which a SiC JFET is co-packaged with a Si MOSFET to produce a device with all of the efficiency advantages of wide bandgap switch technology and the simpler gate drive of Silicon MOSFETs.

The Qorvo TOLL-packaged, Gen4 5.4mΩ SiC FET is included in Qorvo’s FET-JetTM free-to-use online calculator, which allows instant evaluation of efficiency, component losses and junction temperature rise for parts used in a wide variety of AC/DC and isolated/non-isolated DC/DC converter topologies. Single and paralleled devices may be compared under user-specified heat-sinking conditions to determine an optimal solution.