Subject: Re: Difference between AC adapter and charger?
Summary: What do you think of these ping times eh?
References: <0001HW.B9D43FDF0325BBB11662EAD0@news.covad.net> <0001HW.B9D4EE870344BA681662EAD0@news.covad.net>
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Date: Fri, 18 Oct 2002 06:34:23 GMT
NNTP-Posting-Date: Fri, 18 Oct 2002 02:34:23 EDT
On Thu, 17 Oct 2002 22:47:35 -0700, DaveC Gave us:
>Thanks for your post.
>Is it simply a constant current source with no feedback, no sensing of the
>And the "really good ones", how is the voltage depression sensed? With the
>charger connected, and it is well-regulated, I'd presume, wouldn't a
>depressed voltage be nigh inpossible to detect? Is the charger disconnected,
>regularly, and the battery state sensed?
The internal resistance of a battery isn't that hard to detect or
There are actually single chip watchdog solutions for this very
purpose. I think "LT" makes one version.
The newer jobs, such as my charger have watchdog circuits in them
that taper the charging. Most even have LED indicators that change
color after the charge cycle completes. My cell phone charger has a
watchdog control chip in it as well.
Some battery packs actually have them integrated into the battery