Power And Power Management; Power Supply Architecture - Eurotech Vector User Manual

Vector - User Manual

Power and Power Management

Power management is especially critical in high-performance systems that also require low power
dissipation. These systems never really turn "off" but make use of power management techniques that
cycle the electronics into power saving modes. The Vector includes advanced power management
features, including the low-power Atom processor, Advanced Configuration and Power Interface
(ACPI) power management, and the ability to operate in power-saving modes.
This section provides an overview of the power supply architecture and summarizes the Vector power
management system.

Power Supply Architecture

On-board voltage regulators accept the main input voltage from header J10, page 30, and generate all
other voltages required by the Vector circuitry. The embedded controller controls proper sequencing
of voltages to allow for proper start-up, shutdown, and power saving transitions. In addition, it monitors
input power voltages and the on-module voltage regulators.
The following diagram illustrates the power supply architecture of the Vector. Notice that voltages
ending with an "A" indicate supplies that are always on, while voltages ending with an "S" indicate
supplies that are switchable. For power specifications, see Power, page 37.
Vector
Embedded
Ctrl
J10
VIN
Protection
The Vector can selectively turn off power to various subsystems. This load-shedding feature can
significantly reduce power consumption.
selective power management is utilized.
The following are the subsystems that can be disabled selectively:
• LVDS display and backlight
• Ethernet
• Serial port
• USB ports
• Wireless module (Mini PCIe expansion slot)
22
CONTROL
MONITORING
Voltage
Input
Regulators
Figure 4. Power Supply Architecture
V1.8S
V1.9S
V3.3S
V5S
V1.8
V1.9
V3.3
to on-board circuitry
V5
V3.3A
V5A
V3.3BR
V5BR
Applications and the operating system determine how
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