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Reducing switching losses then becomes the single

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Unformatted text preview: hing losses predominate in the power-loss-budget in semiconductor switches. Reducing switching losses then becomes the single most crucial goal. Keeping this goal in mind, the MOSFET/IGBT Drivers should be designed so as to yield ultra fast rise and fall times, matching or exceeding that of the driven MOSFET/IGBTs. Propagation delay time should be extremely low, facilitating implementation of fast overload/short circuit protection. Most semiconductor switches that can withstand momentary overloads specify 10 us as the maximum allowable duration. From the instance of sensing overload/short circuit to the removal of gate signals, time elapsed should be less than 80% of the rated SCSOA time. With the advent of IC Drivers for these fast MOSFET/IGBTs, the designer is relieved of the tedious task of designing elaborate driver circuits. Nevertheless, understanding these newer ICs, their strengths and limitations, is of paramount importance. Different configurations for particular topologies call for specific application knowledge. Illustrations are the best way to explain theory and applications of these Driver ICs. REFERENCES 1. B. Jayant Baliga, “Power Semiconductor Devices”, PWS Publishing Company, Boston, MA (1996) 2. Ned Mohan, Tore M. Undeland, William P. Robbins: “POWER ELECTRONICS: Converters, Applications and Design”, John Wiley & Sons, New York (1994) 3. Power Supply Design Seminar - 2001 series, Unitrode Products from Texas Instruments. 4. Sam Ochi, “Driving your MOSFETs wild to obtain greater efficiencies, power densities, and lower overall costs”, Power Electronics Europe, MayJune 2002 IXAN0009 RECOMMENDED FURTHER READING 1. George J. Krausse, “Gate Driver Design for Switch-Mode Applications and the DE-SERIES MOSFET Transistor”, Directed Energy,Inc. Application Note available from <www.directedenergy.com>. 2000 he has been with IXYS Corporation as a Senior Applications Engineer. He has written a number of Application Reports on the su...
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This note was uploaded on 01/15/2014 for the course ECE 624 taught by Professor Staff during the Winter '08 term at Ohio State.

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