George Yu is a power applications engineer with Linear Technology Corp., Milpitas, Calif. He holds an MS in electrical engineering from Tsinghua University, Beijing, China, and a PhD in power electronics from Virginia Tech, Blacksburg. Email address: gyu@linear.com
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February 14, 2008[Ideas For Design] Use Bootstrap Cell Circuits To Generate Multiple Voltages
Bootstrap circuits are widely used in dc-dc converters to serve as top-side bias voltage supplies. After explaining how bootstrap circuits work, this article will show how versatile they can be. One example bootstrap circuit uses the LTC3728 highside driver. The bias voltage for the high-side driver is produced by the bootstrap supply circuit between the BOOST, INTVCC, and SW pins (Fig. 1). At...
