On 12/7/2014 8:12 PM, ivo welch wrote:
dear experts:
quick hardware question: is power additive? that is, assume I have a 1A
USB 5V adapter installed.
if I now add a standard powered USB 2.0 connection (0.5A) to my (1A) USB 5V
cable, does the BBB now have 1.5A?
No.
The PMIC chip switches one of the power rails (DC barrel jack, USB port,
or the battery connection header) at a time to the internal SYS_5V used
to power the 'Bone, so they don't "add".
Full details are in the System Reference Manual (SRM) and PMIC data sheet.
--
Charles Steinkuehler
--
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