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FAN3268T Scheda tecnica(PDF) 10 Page - Fairchild Semiconductor |
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FAN3268T Scheda tecnica(HTML) 10 Page - Fairchild Semiconductor |
10 / 12 page AN-6069 APPLICATION NOTE © 2007 Fairchild Semiconductor Corporation www.fairchildsemi.com Rev. 1.0.3 • 1/6/10 10 Conclusion Low-side drivers are used to drive power MOSFETs in applications including clamped inductive load switching, synchronous rectifier circuits, and pulse/gate transformer drive circuits. The relationship of gate drive current to the MOSFET switching and transition intervals has been detailed during the prominent MOSFET switching intervals. Potential driver solutions; including discrete components, integrated PMOS/NMOS, and compound drivers, were examined. Some of the non-ideal characteristics of the various driver circuits were highlighted. There is not a simple unified method to characterize the output current sink and source capability of the many types of drivers available. The test circuits presented in this note can be used to investigate the VOUT vs. IOUT capability of discrete and integrated circuit drivers, enabling evaluation and comparison of drivers for a range of applications. References [1] 2006 Fairchild Power Seminar Topic, “Understanding Modern Power MOSFETs,” available on the fairchildsemi.com website at the link: http://www.fairchildsemi.com/powerseminar/pdf/understanding_modern_power_mOSFETs.pdf [2] Oh, K. S., “MOSFET Basics”, July, 2000, available as AN9010 from the fairchildsemi.com website. [3] Balogh, L. “Design and Application Guide for High Speed MOSFET Gate Drive Circuits,” Power Supply Design Seminar SEM-1400, Topic 2, Texas Instruments Literature No. SLUP169. [4] ICE Components Gate Drive Transformer Datasheet “GT03.pdf” dated 10/06, available from www.icecomponents.com. [5] 2006 Fairchild Power Seminar Topic, “Practical Power Application Issues for High Power Systems,” available on the fairchildsemi.com website at the link: http://www.fairchildsemi.com/powerseminar/pdf/practical_power_high_power_systems.pdf [6] Johnson, H. Dr, “High-Speed Digital Design On-Line Newsletter,” Vol. 3 Issue 8, www.sigcon.com/Pubs/news/3_8.htm Author Mark Dennis was born in Troy, NC, and received the Bachelor of Engineering degree from Duke University in 1983. After graduation he has worked in industries encompassing power electronics applications such as offline and DC to DC power supply design for telecom and computer systems, high voltage supplies for electrostatic precipitators, and online UPS systems. For over eight years Mark has been working in the semiconductor industry and he is employed by Fairchild Semiconductor as a Staff Engineer working in High Power Systems. |
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