Option Wireless Technology CG0114, Руководство пользователя

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1.2.6.1. Internal Power Circuits
The voltage applied by the power adapter to the CloudGate is converted into different
voltage rails on the main board. Two different power circuits make five different voltage
rails.
Dedicated high current power circuit
Provides two different voltage rails which both can deliver high current levels:
V_PWR: At the power adapter input of the CloudGate there is an
overvoltage protection circuit and a current limiter of 1.2A. The V_PWR is
the voltage level behind the current limiter. The protection circuit causes
a little voltage drop lower than 1V.
3V4: the 3V4 is a power rail generated by a dedicated power circuit on
the main board. The 3V4 is used on the main board and is also available
on the expansion boards.
Low power circuit generated by the micro controller
Provides three voltage rails for very limited power:
3V3: A 3.3V power rail provided by the micro controller is used on the
mainboard and also accessible to the expansion boards
1V8: A 1.8V power rail provided by the micro controller and only used on
the main board
1V2: A 1.2V power rail provided by the micro controller and only used on
the main board
Voltage Rail Voltage Usage Max Current
V_PWR Equals the voltage
applied by the
power adapter,
minus the drop over
the protection circuit Use for power-hungry
devices Current is limited to
1.2A
3V4 3.4V Powers all standard
digital components
on the expansion
cards 3A maximum of
which the main
board is already
using 1.5A. Only 1.5A
is left for both
expansion cards.
(The sum of both
expansion cards
should be lower than
1.5A)
3V3 3.3V Powers low power
components or level The DC/DC
Converter is a triple
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