Soft switching tradeoff optimized for induction cooking appliances i c 15 a, t c. Softswitching gate drivers slash solar inverter costs. Softswitching gate drive solution slashes solar inverter. Preswitchs twostage softswitching igbt and sic gate. Differences between datasheet test conditions and the application should be taken into account, and an example of how to do this will be given later. Preswitch has launched a softswitching igbt and silicon carbide gate driver architecture that enables a doubling of power output for a typical inverter, or an increase in switching speed by a. The technology has been used to switch 600v igbt transistors at more than 100khz and 900v silicon carbide transistors at 1 mhz. For soft switching applications, the i c2 rating could. A new softswitched igbt and mosfet gated transistor ssimgt base drive. Please explain the operation of voltageresonant soft.
Q g curve is unique for each power switch device and is available in the power switching devices data sheet. Output drive current up to 8 a peak enables the product to drive devices up to 600 a typical without requiring any additional active components. Integrated power devices ipd infineon technologies. However, the emitter of the top igbt is switching to the dc positive voltage and dc negative. Advanced soft switching inverter for reducing switching. Topology soft switching type igbt1 fwd1 2in1 igbt2 fwd2 igbt4 fwd4. Igbt selection for tesla coils or zcs inverters kaizer. Preswitch has announced that its softswitching igbt and silicon carbide gate driver architecture, including the predrive 3 controller board, powered by the preflex fpga, and rpg gate driver board, can significantly reduce the cost of solar inverters. Figure a shows the schematic of a voltageresonant induction cooktop as an application example of soft switching. Ucc2152x and simple single channel isolated igbtsic gate drivers, iso53xx. Igbt series connection with soft switching and power recovery in driver power supply abstract. Product brief 1200v rce reverse conducting igbt author. Reinforced galvanic isolation is delivered using power integrations innovative solid insulator fluxlink technology.
Preflex has been integrated into a standard driver board for a 1200v 225a econodual in a halfbridge configuration. Softswitching gate drive solution from slashes solar. Vee2 is the supply return for the output driver and gnd2 is the reference for the logic circuitry. Please explain hard switching and soft switching using. Hardswitching softswitching the diode copackaged with the igbt conducts before the igbt turns on, on account of the resonant nature of the load. A positive vge of typically 15 v is required to switch the igbt well into saturation. In selfresonant softswitching, a selfoscillating circuit is used to precisely time transistor commutation, resulting in the offset of the current and voltage wave forms figure 4. This paper presented a new softswitching concept that the soft transition is achieved based on gate driver control. The very low drop freewheeling diode results in very high efficiency in soft switching conditions. Separate 9a source and sink outputs allow for tailored turnon and turnoff timing while minimizing switching losses. Based on advanced trench fieldstop tfs technology, the 1250 v igbt ih series is tailored for induction heating applications. The primarily goal of proposing the ssbb based inverter is to find a simple but effective way to achieve soft transition.
Igbt series connection with soft switching and power recovery in. Double pulse test data demonstrates that the preswitch softswitching platform comprising the predrive3 controller board powered by the preflex fpga, and rpg gate driver board reduces total system switching losses by. Soft switching and zero current switching 2 as described above the igbt can be switched on and off faster due to the declining current of the resonant load, we do not have to switch off the current, but we switch when the current is as low as possible. Latest news from the electronics industry electropages. Integrated power device protect ipd protect features not only the industrys best igbt performance considering blocking voltage, static losses and conduction losses in induction cooktop applications and other soft switching application but also integrated protection functions its original concept provides protection against overvoltage, overcurrent, and overtemperature and additional. Igbt driver skyper32r igbt driver manufacturer from new. The 2sc0115t igbt gate driver core supports modules up to 2400 a and switching frequencies of up to 50 khz. Please explain hard switching and soft switching using igbts. The switching losses incurred by slowing down the turnoff of the igbt are not critical at mains frequency. Igbt reverse conduction characteristics hardswitching and. An effective way to apply the turnon and turnoff voltage is to use isolated 15 v and 8 v and to reference this to the emitter of the igbt.
As figure 1 shows igbt equivalent circuit, a bipolar transistor uses a mos gate structure, while the. The emergence of applications which require highvoltage switches has created a tendency to use semiconductor device series stacks. In the circuit of figure a, when the igbt turns on, current flows through the heating coil l1. Technology to control the speed of ac motor continues to develop at a fast pace. A new insulatedgatebipolartransistor igbt and power metaloxidesemiconductor fieldeffecttransistor mosfet gated.
Igbt4 4th generation medium fast trench igbt infineon cal4 soft switching 4th generation caldiode. Igbt gate driver reference design for parallel igbts with. Softswitching gate driver slashes solar inverter costs. Most si828x products except the si8286 have three sep. 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. The company says that the platform, including the predrive3 controller board, powered by the preflex fpga, and rpg gate driver board, enables a doubling of power output for a typical inverter, or an increase in switching speed by a factor of up to 20 times. The final output will be pure sin wave which is given to the. A gate driver based softswitching sic bipolar junction. Igbt dynamic loss reduction through device level soft switching. Igbt is the acronym for insulategate bipolar transistor, a power semiconductor that combines mosfet highspeed switching, voltage drive characteristics, and the low on resistance low saturation voltage characteristics of a bipolar transistor.
The soft light dimmer shown in figure 14 and discussed in reference 2 is based on the use of an igbt as a switch whose turnoff may be controlled. The igbt driver cores reinforced electrical isolation targets systems with a working voltage of 900 v, which is typical for 1200 v igbt modules and complies with the pd2 and ov ii requirements of iec 606641 and iec 6180051. Highvoltage mosfet behavior in softswitching converters. One of these benefits is the ease of use of the mosfet devices in high frequency switching applications. Additionally, the insulation voltage level is guaranteed to be equal between control circuit and highvoltage side of each igbt. Pdf highvoltage mosfet behavior in softswitching converters. Such a circuit allows the current switching slopes to be controlled, removing the need for an emi filter, reducing costs and eliminating the. H bridge 2in1 2mbi100hb12050 2mbi200hh12050 2mbi300hh12050 igbt1 fwd1 2in1 igbt2 fwd2 igbt4 fwd4 chopper feature.
The driver current is sourcing the miller current and results in no increase in the vgs voltage. Aibased softswitching gate drivers boost switching speed up to. In order to maximaize the performance of an igbt, it is important to properly set the drive circuit. Ucc27531 is ideal for inverters, ups, hevev and industrial. When the igbt turns on, it has only a diode drop between emitter and collector. Preswitchs twostage softswitching igbt and sic gate drive architecture slashes solar inverter costs. Softswitching gate drive solution from preswitch slashes. How to maximize the gate driver performance from basic to details parasitics in the gate driver hardsoft switching high dvdt and didt isolated gate driver part numbers mentioned. A new insulated gatebipolartransistor igbt and power metaloxidesemiconductor fieldeffecttransistor mosfet gated transistor imgt. In particular, a gate driver based zero voltage switching sic bjt inverter scheme is proposed. Aibased softswitching gate drivers boost switching speed. Preswitch announced that its revolutionary softswitching igbt and silicon carbide gate driver architecture, incorporating the predrive3 controller board, powered by the preflex fpga, and rpg gate driver board, can decrease the cost of solar inverters. The platform, including the predrive3 controller board, powered by the preflex fpga, and rpg gate driver board, enables a doubling of power. When the gatedrive of the mosfet is taken off, the igbt current is forced to zero at the switching speed of the mosfet.
Gda2a4s1 is a 4 channel igbt gate driver board with configurable dead time and short circuit protection. The driver based soft switch concept was originated from development of a base driver circuit for current driven bipolar junction transistor bjt. The gate drive ic using softswitching gate drive method, which is. As shown above, we use preflexs ability to eliminate 80% of an igbt s switching losses to switch 5 times faster. Igbt series connection with soft switching and power. Flexible high current igbt gate driver with reinforced. For switching losses, soft switching technology is used. Hard switching is used for simple switch, motor drive inverter, and switchedmode power supply applications. Preswitch has released first test data from its cleanwave 200kw inverter reference. Preswitch has announced its revolutionary softswitching igbt and silicon carbide gate driver architecture, including the predrive3 controller board, powered by the preflex fpga, and rpg gate driver board, can significantly reduce the cost of solar inverters.
The benefits of a selfresonant softswitching topology is the elimination of switching losses, an increase in efficiency and the reduction of emi. In contrast, soft switching uses an lc resonant circuit. Preswitch on ai solving softswitching control challenge. The ix4351ne is designed specifically to drive sic mosfets and high power igbts. Therefore, what follows deals only with mosfet models. Preswitchs forcedresonant softswitching topology replaces the traditional igbt or silicon carbide driver with a common intelligent controller board, predrive3, and a specific plugin rpg. Gate driver for sic power mosfets using softswitching technique. Preswitch has announced that its softswitching igbt and silicon carbide gate driver architecture, including the predrive3 controller board, powered by the preflex fpga, and rpg gate driver board, can reduce the cost of solar inverters. 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. The terms hard switching and soft switching refer to the methods of switching based on the relationship of current and voltage during the turnon and turnoff of the igbt. Compared with the mosfet, there is one more pn junction.
Fundamentals of mosfet and igbt gate driver circuits the popularity and proliferation of mosfet technology for digital and power applications is driven by two of their major advantages over the bipolar junction transistors. Soft switching technology is relative to hard switching. Igbt soft switching technology and adjustable frequency. The predrive pdec1215a is the worlds first econodual 1200v igbt 200a half bridge gate driver with builtin zvs zero voltage switching circuitry. New 3phase gate drive solution from preswitch doubles. Driving mosfet and igbt switches using the si828x silicon labs. Hard switching is a switching method that simply uses a devices own ability. The twostage architecture delivers the same switching loss performance as a fivelevel design, resulting in reduced cost, control complexity and bom count. An internal negative charge regulator provides a selectable negative gate drive bias for improved dvdt immunity and faster turnoff. These series stacks permit operation at blocking voltages above semiconductor elements nominal voltage. Power switching device cannot drive themselves ti training. Each ibgt gate driver board requires an external 15v and 8v. Moreover, based on the gate driver circuit, different open and closed loop control strategies have also been proposed.
Advanced soft switching inverter for reducing switching and power losses dr. Igbt gate driver reference design for parallel igbts with shortcircuit protection and external bjt buffer 1. Power switching device cannot drive themselves mastering the art of high voltage gate driver design in ups, telecom, and servers. When the igbt turns off, l1 and c1 go into resonance, causing sinusoidal voltage to be applied to the igbt. The sid11x2k family of gate driver ics are singlechannel igbt and mosfet drivers in a standard esop package. The gate current charges c gs, c gd, and v gs increases linearly. Xfactor is the amount faster a system can switch because of the reduction in switching losses enabled by preswitch soft switching. Product brief 1200 v rce reverse conducting igbt economical and efficient igbt for induction cooking appliances published by infineon technologies austria ag. Selecting the right value of the external gate resistance is essential in limiting the noise and energy loses in the switching operation and its selection may vary depending on the. Fundamentals of mosfet and igbt gate driver circuits. Manufacturer of igbt driver skyper32r igbt driver, dual a316j igbt driver, a316j igbt driver 4 channel and a316j igbt driver 6 channel offered by v. Gate driver based soft switching for sic bjt inverter. Aibased soft switching using 200kva inverter reference.