Venice Single Board Computer Operating Manual
Power Architecture
DC input power is supplied through a 2-pin connector, or the Ethernet Port connector
using Passive Power over Ethernet.
2-Pin Connector Power
The 2-pin connector is at location J15 in a 1x2x2mm configuration. The input
voltage range is 8-60V. The mating connector is PAP-02V-S, available from
Digikey as part number 455-1486-ND.
Passive Power over Ethernet
The RJ45 Ethernet jack supports Full Wave Passive Power over Ethernet. This
configuration is most useful for powering the SBC through an Ethernet jack
without an 802.3at compliant PSE switch. The input voltage range is 10-60V.
The data pairs for Passive Power over Ethernet have a 0.8A current limit. It may
be necessary to increase the input operating voltage to deliver the power needed
for the Mini-PCIe radios and USB charging ports. As an example, assume the
application includes a high power radio card that requires a total of 8W and a
USB device that requires a total of 7W. The required power is 15W for the
peripherals plus 4W for the SBC. The total power requirement is approximately
21W assuming 90% efficiency for the primary power supply.
More PoE information is available on the Gateworks wiki here:
http://trac.gateworks.com/wiki/poe
Switching DC/DC Regulators
All power supply voltage rails are generated with high efficiency DC to DC
switching regulators. The SBC is classified as a SELF Safety Extra Low Voltage
Device since the maximum input voltage is below the 60VDC SELV limit as
defined by IEC 60950-1 and other standards.
Feature
Benefit
High efficiencies (up to 95%)
Reduces heat generated in enclosure
High power output (up to
30W)
Supports high power Mini-PCIe cards
Thermal shutdown
Protects against overheating
Output current limit
Protects against short circuits
Controlled startup
Reduces component stress and power surges
Common mode input filter
Reduces emissions for agency certification
Switching DC/ DC Regulator Features
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