Streamlining Synchronous Buck-Boost Converter Design

Focus:

Buck-boost conversion is essential across numerous applications including battery charging, solid-state lighting, industrial computing, and automotive. This article offers a brief review of many factors associated with four-switch buck-boost converter designs. It specifically addresses component selection and power loss calculations, and pulls from a quick-start calculator tool to coordinate and accelerate converter design flow. The particular design example presented here is based on the LM5175 buck-boost controller, which employs a unique scheme in buck-boost mode whereby both buck and boost legs switch at reduced frequency in quasi-interleaved manner, providing substantive advantages for efficiency and power loss. A step-by-step design procedure using TI’s quick-start calculator tool is described.

What you’ll learn:

• How to design a four-switch synchronous buck-boost converter with improved efficiency using the LM5175 controller
• How to design a four-switch buck-boost converter based on the LM5175 controller using TI’s design tool

View the Source

Author & Publication:

Timothy Hegarty, Texas Instruments, Phoenix, Ariz, How2Power Today, Mar 13 2015

This article summary appears
in the HOW2POWER Design Guide.

The Design Guide offers
organized access to
hundreds of articles
on dozens of power conversion
and power management topics.

The Design Guide search results
include exclusive summaries
and accurate "how to" analysis
to help you make faster,
more informed decisions.

Search
for more articles