Categories

App note: Buck-boost converter

Posted on Sunday, December 18th, 2011 in app notes by DP

Here is an article from Texas Instruments featured on EETimes describing how to design a buck-boost converter. These converters are used when the input voltage can be both above and below the output voltage. One example are 3.3V systems powered by lithium-ion batteries which swing from ~3V to ~4V.

This design is in effect a combination of both buck and boost reference designs. When the right switch is left open and control is applied to the left switch a buck converter is made. Vice-versa, when the left switch is left closed and control is applied to the right switch a boost converter is built.

A graph describing the transition form buck to boost is below.

This entry was posted on Sunday, December 18th, 2011 at 11:00 am and is filed under app notes. You can follow any responses to this entry through the RSS 2.0 feed. You can skip to the end and leave a response. Pinging is currently not allowed.

Leave a Reply

Notify me of followup comments via e-mail. You can also subscribe without commenting.

Recent Comments

  • gant: They still have a couple of the more expensive (but still considerably cheap) 5S-I-S01 in stock...
  • William: lol I'm happy to waste 3c for each program/debug cycle... but probably not the time spent soldering a new device down to a proto board!...
  • Joe Desbonnet: Ya, I can recommend the low melting point solder. I used brand 'ChipQuik' and it's amazingly easy to use.
  • Jerome: I need a new BusPirate for the Fablab ;) Many thanks!
  • Max: Seems like an unexpectedly violent way to remove the chip indeed. A hot air station should of course do the job just fine, but in...