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Rockbox mail archiveSubject: Re: Questions about LiIon charger circuit and power drainRe: Questions about LiIon charger circuit and power drain
From: Linus Nielsen Feltzing <linus_at_haxx.se>
Date: Tue, 17 Aug 2004 19:41:17 +0200 Christi Alice Scarborough wrote: > 1) The charger circuit has a PROG pin, which can be used to indicate > charging progress in the constant voltage stage of LiOn charging. Is > this wired up on the JB in such a way that V(PROG) is available to Rockbox? Yes. It is connected to A/D channel 7 (ADC_EXT_POWER). See powermgmt.c for a (limited) use of it. > 2) What is the value of R(PROG) in the Jukebox? If I can find this out, > then I can work out what current is being applied in the constant > current stage of charging. It depends on the power source, USB or external DC. I have my notes at home, I'll check it out when I get home. > 3) (Personal curiosity) If the circuit shuts down automatically, how > come my JB remains hot when plugged into the mains? It never stops charging, AFAIK, it keeps on charging with a very low current. Linus _______________________________________________ http://cool.haxx.se/mailman/listinfo/rockbox Received on 2004-08-17 Page template was last modified "Tue Sep 7 00:00:02 2021" The Rockbox Crew -- Privacy Policy |