The success or failure of a SwitchMode Power Supply design depends heavily
on the magnetic components. Circuit optimization and magnetic device
optimization are closely interrelated. This topic provides a comprehensive
approach to magnetics design especially relevant to high frequency SMPS
applications. Circuit designers will benefit from the ability to design, or
participate in the design of the magnetic components.
Sections 1, 2, and 3 provide an overview of basic magnetic theory and
discuss practical design aspects, including core material characteristics,
how to predict and minimize high frequency winding losses, and how to
minimize parasitic inductance and capacitance.
Sections 4 and 5 apply these principles to practical examples of
transformer, filter inductor and flyback transformer design, utilizing an
approach which optimizes utilization of the magnetic core, thereby
minimizing size and cost. Cookbook examples of a variety of magnetic
devices are presented, to illustrate the design techniques used.
This topic was presented at Unitrode Power Supply Design Seminars in 1997 -
2000. A Magnetics Design Handbook that was given to earlier Seminar
attendees covers this material in greater detail, and includes reference
articles. The Magnetics Design Handbook can be obtained from Texas
Instruments Marketing Communications Department/Power Supply Control
Products, 7 Continental Boulevard, Merrimack, NH 03054, Telephone:
603-429-8725 or may be downloaded from the website at: power.ti.com under
the "Training" section.
