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1700 V SiC MOSFET die, discrete, and power modules combine to increase frequency switching

July 28, 2021 By Redding Traiger

Today’s energy-efficient electric charging systems powering commercial vehicle propulsion, as well as auxiliary power systems, solar inverters, solid-state transformers, and other transportation and industrial applications all, rely on high-voltage switching power devices. To meet these requirements, Microchip Technology Inc. announced the expansion of its silicon carbide portfolio with a family of high-efficiency, high-reliability 1700V silicon carbide MOSFET die, discrete, and power modules.
 
Microchip’s 1700V silicon carbide technology is an alternative to silicon IGBTs. The earlier technology required designers to compromise the performance and use complicated topologies due to restrictions on switching frequency by lossy silicon IGBTs. In addition, the size and weight of power electronic systems are bloated by transformers, which can only be reduced in size by increasing switching frequency.
The new silicon carbide product family allows engineers to move beyond IGBTs, instead of using two-level topologies with the reduced part count, greater efficiency, and simpler control schemes. Without switching limitations, power conversion units can be significantly reduced in size and weight, freeing up space for more charging stations, additional room for paying passengers and cargo, or extending the range and operating time of heavy vehicles, electric buses, and other battery-powered commercial vehicles – all at reduced overall system cost.
 
Features include gate oxide stability where Microchip observed no shift in threshold voltage even after an extended 100,000 pulses in repetitive unclamped inductive switching (R-UIS) tests. R-UIS tests also showed excellent avalanche ruggedness and parametric stability and with gate oxide stability, demonstrated reliable operation over the life of the system. The degradation-free body diode can eliminate the need to use an external diode with the silicon carbide MOSFET. A short-circuit withstand capability comparable to IGBTs survives harmful electrical transients. A flatter RDS(on) curve over junction temperature from 0 to 175 degrees Celsius (C) enables the power system to operate at greater stability than other silicon carbide MOSFETs that exhibit more sensitivity to temperature.
 
Microchip streamlines the adoption of its technology with a family of AgileSwitch digital programmable gate drivers and a wide range of discrete and power module packaging, available in standard and customizable formats. These gate drivers help speed silicon carbide development from benchtop to production. 
 
Other Microchip silicon carbide products include families of MOSFETs and Schottky Barrier diodes at 700V and 1200V, available in bare die and a variety of discrete and power module packages. Microchip unifies in-house silicon carbide die production with low-inductance power packaging and digital programmable gate drivers to enable designers to make the most efficient, compact, and reliable end products. The company’s total system solutions also include a portfolio of microcontrollers (MCUs), analog and peripherals, and communication, wireless, and security technology.
 
Silicon carbide SPICE simulation models compatible with Microchip’s MPLAB Mindi analog simulator provide system developers with resources to simulate switching characteristics before committing to hardware design. The Intelligent Configuration Tool (ICT) enables designers to model efficient silicon carbide gate driver settings for Microchip’s AgileSwitchfamily of digital programmable gate drivers. 
 
Microchip’s 1700V silicon carbide MOSFET die, discrete and power modules are available now for order in a variety of package options.

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Filed Under: Automotive, Development Tools, drivers, MOSFETS, power modules, Security, Telecommunications, Wireless Tagged With: microchiptechnologyinc

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