Difference between revisions of "Supply"

Revision as of 15:25, 17 November 2009

V_BATT

• Supply voltage: 3.6V - 5.0V (max. 6.0V)

This net powers the gumstix motherboard and all expansion boards. V_BATT is located on all modular connectors.

V_BACKUP_BATT

• Supply voltage: 3.0V

This net connects to the pin 'VBACKUP' of the power management chip TPS65022.
It exists to source power from an off-board backup battery. V_BACKUP_BATT is located on the 24-pin connector.

If your application needs a backup battery, connect a 3V Li-Ion cell directly to V_BACKUP_BATT and GND and remove R9 (0 Ohm resistor to ground).

Use a boost converter (ex. TPS61070) if you use a single NiMH battery

In systems where no backup battery is used, this net is connected to GROUND.
On the verdex, this is done with R9 (0 Ohm resistor), which is populated by default on our website-sale boards.

SYS_EN

Power Management

Powering Gumstix from batteries

three or four rechargeable NiMH AA cells in a battery holder work OK.

Lithium Ion batteries work well. for example VARTA 56491201012.

Related pages on the gumstix website:

http://pubs.gumstix.org/documents/Powering_a_Gumstix.pdf

Related pages on the old wiki:

http://docwiki.gumstix.org/index.php/Gumstix_motherboard_I/O#Batteries_and_power

http://docwiki.gumstix.org/index.php/Batteries

.