Sic gate driver fundamentals ebook texas instruments. Safe switching of highspeed siliconcarbide sic and galliumnitride gan transistors places an extra requirement on isolated gate driver ics. Therefore, the galvanically isolated eicedriver ics based on infineons coreless transformer technology are recommended as most suitable. The reference design provides customers with a highly isolated sic mosfet dualgate driver switch to provide a means for evaluating sic mosfets in a. And lastly, the orange waveform depicts the drain current of the mosfet. In this paper, we investigated a gate driver using a gan hemt pushpull configuration for the highfrequency hard switching of a sic power mosfet. For use with cas300m12bm2, 1200v, 300a module and cas120m12bm2, 1200v, 120a module. Ultrafast switching 1200 v power transistors such as coolsic mosfets can be easier handled by means of isolated gate output sections. I am looking for how to calculate value of the mosfet input resistor r3.
Eicedriver sic mosfet gate driver ics infineon technologies. The ecce2015 student hardware demo 1st place winner a 15kv sic mosfet gate driver with a laserlightoverfiber based isolated power supply and. Takafumi okuda and takashi hikihara in this paper, we. Sic mosfet 1200 v gate driver ics ultrafast switching power transistors such as coolsic mosfets can be easier handled by means of isolated gate output sections.
Sic mosfet isolated gate driver mouser electronics. With a range spanning from single to halfbridge and multiplechannel drivers rated for either low or highvoltage up to 1500 v applications, st also offers galvanicallyisolated gate driver ics for safety and functional requirements, systeminpackage sip solutions integrating high and lowside gate drivers and mosfetbased power stages. Choosing the drive strength depends on the power switch used igbt or mosfet, based on its gate charge. Analog devices small form factor isolated gate drivers are designed for the higher switching speeds and system size constraints required by power switch technologies such as sic silicon carbide and gan gallium nitride, while still providing reliable control over switching characteristics for igbt insulated gate bipolar transistor and mosfet. An4671 application note how to fine tune your sic mosfet gate driver to minimize losses l. Integrated galvanic isolation and low onresistance drive transistors provide high charging and discharging current, low dynamic saturation voltage and railtorail gate voltage control.
The ncp51705 driver is designed to primarily drive sic mosfet transistors. Using isolated gate drivers for mosfet, igbt and sic. Sic mosfet performance is optimized to achieve dramatically improved power savings. Select the right silicon carbide or igbt gate driver for your next. How to fine tune your sic mosfet gate driver to minimize losses. Controlling sic mosfet power switches with a full range of scale gate driver products. A gate driver of sic mosfet for suppressing the negative. Cmttit8243 1200v halfbridge sic mosfet gate driver optimized for 62mm power modules 1200v high temperature. Considering that sic mosfets have relatively low gate threshold voltage, vth, a small amount of ground bounce could cause a positive bias of vgs exceeding vth, if the gate driver is not designed to generate negative gate voltage. Gate circuit parameters of sic transistors differ slightly from those of common mosfet or igbt transistors, and in order to be able to fully utilise the capabilities of these new devices, it is necessary to employ appropriate drivers. Sic mosfet gate drive design considerations ieee xplore. A mosfet driver is a type of power amplifier that accepts a lowpower input from a controller ic and produces a highcurrent drive input for the gate of a highpower transistor such as an insulatedgate bipolar transistor igbt or power mosfet. It is therefore crucial to drive sic mosfets in such a way as to facilitate lowest possible conduction and switching losses, which is why this.
Sicdiodes sicmosfets and gate driver ic technical articles. Mosfet input voltage vds 10v output power required is 200w. Basically this is the gate driver circuit for the mosfet with pdm signal as the input. Sic mosfet gate drive optocouplers eeweb community. Siliconcarbide devices offer a range of benefits, such. Following is the application diagram of the module. Silicon carbide sic mosfets dramatically improve switching performance for high power inverter applications, providing high breakdown electric field strength and carrier drift velocity while enhancing thermal performance. A family of tested reference adapter boards will provide compatibility with most sic mosfet modules. Sic mosfet driver targets industrial inverters and motor. Based on volume experience and compatibility knowhow, infineon introduces the revolutionary coolsic mosfet technology which enables radically new product designs.
Superior gate drivers make sic mosfets the top highpower switching devices. Find a downloadable version of this story in pdf format at the end of the story. Superior gate drivers make sic mosfets the top highpower. Sic11x8kq scaleidriver gate driver ics for automotive useoptimized for driving silicon carbide mosfetsfast shortcircuit protection and maximized switching virtual stand automotive gate driver for sic mosfet gate drivers. Dual sic mosfet driver reference design the dual silicon carbide sic mosfet driver reference design is an open source solution that provides userfriendly design guides enabling faster time to market for customers using microsemi sic mosfets, while supporting the. Gate driver board for 3 rd generation c3m sic mosfets. Gate driver circuit optimization for sic power devices. In this paper, a new sicmosfet gate driver circuit is shown, with the following specifications provide positive output voltage to turnon and negative voltage to turnoff the power transistor. The proposed gate driver recycles the energy which is stored in the gate capacitor of the sic mosfet. Select the right silicon carbide or igbt gate driver for your next energyefficient, robust and compact system design. The drive strength refers to the gate drivers current source and sink capability. Therefore, the following eicedriver galvanically isolated gate driver ics based on our coreless transformer technology are recommended as most suitable.
The green waveform depicts the drain to source voltage. Dual channel sic mosfet driver board creewolfspeed. Texas instruments ucc2753x ic family are singlechannel, highspeed, gate drivers capable of driving sic mosfet power switches by up to 2. Low onresistance and low input capacitance of gan hemts are suitable for a highfrequency gate driver from the logic level, and robustness of sic mosfet with high avalanche capability is. This design replaces previous versions of this application note and include new enhancements. Gate driver ics with perfect fit to coolsic mosfet.
Applications including heavyduty traction vehicles, auxiliary power units in trains, buses and trolleys, induction heating systems and other highpower industrial systems are. This article discusses one such driver for sic transistors. The 6a ncp51705 driver is designed to primarily drive sic mosfet transistors. These drivers incorporate most important key features and parameters for silicon carbide mosfets driving such as tight propagation delay matching, precise. Cgd15sg00d2 gate driver for 3rd generation c3mtm sic. Isolated gate drivers enable lowvoltage microcontrollers to safely switch highvoltage power transistors on and off. The 62em1 provides up to 20 amps of peak current at an operating frequency up to 125 khz. Technical article sicdiodes sicmosfets and gate driver ic april 09, 2015 by christopher rocneanu this article rohms sic diode and mosfet portfolio has been introduced and several advantages have been shown from sic mosfets and diodes. Agileswitch, llc has introduced the asc1 agileswitch software configurable core 1 sic mosfet gate driver core. The blue waveform depicts the gate to source voltage of the mosfet. Sic mosfet isolated gate driver application note wolfspeed. To improve the system efficiency, smaller propagation delay and deliberation are required for silicon carbide mosfet driver.
The gate drive losses of the resonant gate driver are reduced greatly, and the switching. A sic mosfet gate driver is therefore already available, supported by documentation and evaluation board which can be used for initial tests. This article describes an implementation of an isolated gate driver suitable for testing and evaluating sic mosfets in a variety of applications. Using isolated gate drivers for mosfet, igbt and sic applications nagarajan sridhar strategic marketing manager new products and roadmap high power driver solutions, hvps, sva. This is the first step to be done, to avoid parasitic components that add noise or spikes to the applied voltages or currents.
Mosfet drivers are beneficial to mosfet operation because the highcurrent drive provided to the mosfet gate decreases the switching time between. Driver for sic mosfet modules in industrial applications. The agileswitch 62em162mm electrical driver provides monitoring and fault reporting information to enable better control and analysis of an sic mosfet based power systems. Sic mosfet gatedriver design for best efficiency and reliability. The applied gatesource voltage is also responsible for holding the mosfet off until the next turnon cycle.
Gate driver ics suitable for sic mosfets are available from ixys, texas instruments and most recently from avago. Sic mosfet gatedriver design for efficiency and reliability. In conclusion, these gate driver boards are equipped to help you drive your switching circuit with ease and flexibility in all power switching applications. Siliciumcarbid sicgatetreiber ubersicht gatetreiber.
Cgd15hb62p1 gate driver for 1200v, 62mm sic mosfet power module. Getting the best from silicon carbide power transistors calls for switching. Driving mosfet and igbt switches using the si828x the si828x products integrate isolation, gate drivers, fault detection protection, and operational indicators into one package to drive igbts and mosfets as well as other gated power switch devices. To achieve the lowest possible conduction losses, the driver is capable to deliver the maximum allowable gate voltage to the sic mosfet device. Power mosfet drivers products microchip technology inc. In comparison to traditional silicon based switches like igbts and mosfets, the silicon carbide sic mosfet offers a series of advantages. Achieve robust isolated systems using our gate drivers with fast integrated shortcircuit. Gate driver boards for sic, mosfet and igbts taraz. But due to applied high stress, smaller shortcircuit. Required properties of the gate driver such as high dielectric strength and low inputtooutput stray capacitance were evaluated through a series of measurements. This is the datasheet of the driver ic i am working on lm5112. The agileswitch 62em162mm electrical driver provides monitoring and fault reporting information to enable better control and analysis of an sic mosfetbased power systems. Sic mosfet gatedriver design for best efficiency and. A mv intelligent gate driver for 15kv sic igbt and 10kv.
The gd3100 is an advanced singlechannel gate driver for igbtssic. Silicon carbide technology can provide several types of benefits figure 1. Desaturation detection circuitry detects an over current condition of the sic mosfet and initiates a soft turn off, thus preventing a potentially damaging dvdt event. Product index integrated circuits ics pmic gate drivers. Mosfet efficiently and reliably call for a very specific type of gate driver. Without exception, the requirements for driving a sic. Silicon carbide coolsic mosfets infineon technologies. Siliconcarbide sic mosfets that become a visible part of the mosfet market require special gate drivers that are able to provide a negative voltage to the gate in a mosfets off state, high chargedischarge pulse current, and are fast enough to operate gate in the nanoseconds range. Virtual stand automotive gate driver for sic mosfet. The acplw346 is a basic gate driver optocoupler used to isolate and drive the sic mosfet operating at high dc bus.
Gate drivers are available at mouser electronics from industry leading manufacturers. Controlling sic mosfet power switches with a full range of scale gate driver products figure 1. Driving sic mosfets with a highspeed gate driver ic. Getting the best from silicon carbide power transistors calls for switching frequencies up to five times higher, and gatevoltage excursions up to two times greater, than typically applied to siliconbased alternatives. The companys sic power mosfet is the end result of many years devoted to materials research, process development and device design. This paper presents an intelligent mediumvoltage gate driver imgd for 15kv sic igbt and 10kv sic mosfet devices. Flybackbased highside gate driver for a 10kv sic mosfet. In an application note about finetuning sic mosfet gate drivers, stmicroelectronics recommends making rgon at least 1. How sic mosfet gate drivers make for smaller inverters and. Dialog semiconductor gmbh diodes incorporated infineon technologies ixys ixys integrated circuits division ixysrf linear technologyanalog devices maxim integrated melexis technologies nv. Boost the efficiency of your design with strong drive currents, high cmti and short propagation delays of our sic and igbt gate drivers.
Power electronics today is about the constant pursuit of efficiency improvements as well as cost and size reduction. So, all available gate driver boards provide adequate features and functionality that cover most applications and devices such as igbts, mosfets, and silicon carbide sic fets. Pdf a new active gate driver for improving the switching. The scope capture in figure 2 shows acplw346 with a 20 v, fast rise and fall times signal profile at the gate of the sic mosfet which is necessary to switch the sic mosfet efficiently. Both power igbts and mosfets are voltagedriven at the gate, since the igbt is internally a mosfet driving a bipolar junction transistor bjt. There are also other desirable driver features to consider, including close delay matching, fast desaturation protection, undervoltage lockout. Presented in this paper is a flybackbased gate driver, which is dedicated for driving a highside 10kv sic mosfet. Get to know and compare various short circuit protection methods for sic mosfets. Mosfet drivers mosfet gate drivers, igbt, power mosfet. Solar inverters and chargers for electric vehicles that substitute siliconcarbide mosfets for ordinary igbts can be half the size of conventional units. Silicon carbide sic gate drivers overview gate drivers power. Sic gate drivers for traction and heavyduty vehicle hdv applications can be. An internal negative charge regulator provides a selectable negative gate drive bias for improved dvdt immunity and faster turnoff.
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