Robotics RB5 Development Kit Hardware User Manual
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6
Power management
The 96Boards specification defines how power arrives to the board and the supplies that
the board needs to provide. The onboard power requirement for each 96Boards
implementation depends on the SoC and the set of peripherals that are specific to that
implementation.
RB5 uses five buck regulators: U0700, U0701, U0800, U0801 as the main power suppliers
for RB5, provide 4.2V for 865 SOM, 4.2V, 5V and 3.3V for peripherals in RB5.
U0700 and U0701 generate 4.2 V at 4A. U0700 feeds the 4.2V power for peripherals
in RB5. U0701 feeds the 865 SOM power.
U0800 generates 3.3 V at 4A.
U0801 generates 5 V at 4A.
6.1
DC Power Input
The 96Boards specification calls for power to be provided to the board in one of the
following ways:
8 V to 18 V power from a dedicated DC jack
□RB5 supports this requirement through the use of #15 (see Section 1.2.1).
8 V to 18 V power from the DC12V pins on the low-speed expansion connector
llA USB Type C port at 5 V
□The Robotics RB5 Development Kit supports the 5 V from USB Type C port. It
cannot support system bring up power on.
6.2
Power Source Selection
The 96Boards specification calls for only one power source to be applied to the board at
any given time.
Following this requirement, RB5 user should never apply power to the board from #15
(see Section 1.2.1) and the low-speed expansion connector at the same time.
There is no active or passive mechanism on RB5 to prioritize one source over the other.
6.3
Power Sequencing
Upon applying power to the DC12V of Robotics RB5 Development Kit (from either one of
the two sources), some power will be automatically enable, some will waiting S/W to
enable.
4.2V for 865 SOM: will enable after DC12V is asserted. 865 SOM will power on once
