High efficiency battery boost regulator using the MCP1640

Posted on Wednesday, February 13th, 2013 in LEDs by DP


Giorgos over at PCBheaven made a MCP1640 boost converter for his camping LED light project. It’s designed to squeeze every last bit of energy from the batteries.

What i want now, is something to spice up this hack. So here is what – I used the MCP1640 boost converter to drain the last electron from the batteries. This chip can work with a ridiculous low voltage and provide enough power to drive a couple LEDs. Which means the 2 AA batteries will operate even longer and the LEDs will be much brighter.

This entry was posted on Wednesday, February 13th, 2013 at 10:00 pm and is filed under LEDs. 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.

5 Responses to “High efficiency battery boost regulator using the MCP1640”

  1. r4k says:

    With so many dedicated LED drivers (constant current) on the market today, why would you want to go with a generic voltage regulator?

  2. Garrett says:

    because this seams like it could be used with other projects without hassle, if its geared at LEDs only, then that speaks for itself, this looks like a “proof of concept” display of the circuit working in action [at least to me]

  3. r4k says:

    Because LEDs should always be driven constant current, not constant voltage.

Leave a Reply

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

Recent Comments

  • KH: Using an alkaline coin cell down to 1.0V or under is a very bad idea anyway, unless you as the designer or manufacturer don't care...
  • KH: Farnell says TS1001 is no longer stocked. Not on RS. Digikey says it's obsolete. That said, there are a lot of nanoamp-class parts on sale...
  • Peter: Sunday--
  • Chris Brightly: Best of luck to all, including the wayward prototypers yet to post!
  • Wolfi: o/