Categories

Tiny USB Li-Po battery charger

Posted on Thursday, December 15th, 2011 in project logs by DP

This is a tiny, easy to make USB Lithium-Polymer battery charger. It’s based on the MAX1555 charger IC.

This entry was posted on Thursday, December 15th, 2011 at 6:00 pm and is filed under project logs. 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.

6 Responses to “Tiny USB Li-Po battery charger”

  1. ewertz says:

    No “Read more…” or link-to-forum….?

  2. Drone says:

    I was under the impression a proper USB charger needs to communicate with the USB host to ensure it will supply the full 500mA available from a USB 2.0 port. This MAX1555 part seem incapable of doing this – and off hand I don’t know of another that can.

  3. Hendrik Lipka says:

    The MAX1555 charges with just 100mA when USB-powered. When it is used with an external supply (which cannot be done with the circuit linked above) it charges with 280mA.

  4. Paul says:

    Sweet, my post ;)
    I’ll have one wit ha Microchip up in one or two weeks I hope.
    Real PCB’s on the way for that thought. Max1555 is too expensive and hard to get.

Leave a Reply

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

Recent Comments

  • Bob: Jambalaya rocks.
  • KH: I should point out something... well, lead acid car batteries are designed to be well-charged all the time. The plates (which are patterned and thin)...
  • David Haile: You are a smart person and absolutely correct. That kind of current needs a lead acid car battery behind it. Still, it does have its...
  • KH: The solution discussed in the linked article is wrong. It's a largish Lipo (2500mAh) and he thinks 77uA is acceptable... ha ha ha ha ha....
  • Dave: I never had to opportunity to learn or use this stuff when I was in college (I'm sooo old that op-amps were just being developed...