Beagle power supply improvements about beagleboard

[GoogleCodeExporter]

Diode steering is not done because it would interfere with USB OTG port in the 
OTG 
mode, where it supplies the 100mA 5V. The decision has been made to keep the 
design 
as is in order to support all true OTG modes. This is the reason not to use the 
DC 
supply and the USB interface at the same time.


-When the DC jack is plugged in, there is no connection between the VBUS and 
the 
DC_5V rail. The FET is open. Therefore there is no path for the VBUS to drain 
back 
into the DC or the DC to drain back into the VBUS when in the DC powered mode. 
It is 
isolated.


-There is decoupling on SW_IN on the REV B board.

Original comment by [email protected] on 9 Jul 2008 at 7:36

[GoogleCodeExporter]

-Diode steering is not done because it would interfere with USB OTG port in the 
OTG
mode, where it supplies the 100mA 5V. The decision has been made to keep the 
design
as is in order to support all OTG modes.

-When the DC jack is plugged in, there is no connection between the VBUS and the
DC_5V rail. The FET is open. Therefore there is no path for the VBUS to drain 
back
into the DC or the DC to drain back into the VBUS when in the DC powered mode. 
It is
isolated.

-There is decoupling on SW_IN on the REV B board.

Original comment by [email protected] on 10 Jul 2008 at 12:57

[GoogleCodeExporter]

Only the changes already made to Rev B will be applied.

Original comment by [email protected] on 10 Jul 2008 at 12:58

• Changed state: WontFix