User Manual

P A G E 8
F u s i o n f o r T I V A v 8 M a n u a l
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P O W E R S U P P L Y
P A G E 8
Figure 1: Power supply unit view
Power supply unit
The Power supply unit (PSU) (1) module provides a clean and regulated power,
necessary for continuous operation of the development board. The MCU along with
the rest of the onboard peripherals, demands regulated and noise-free power supply.
Therefore, the PSU module is carefully designed to regulate, filter, and distribute the
power to all parts of the Fusion for TIVA v8 development board.
The PSU module also contains a battery charging circuit, which utilizes the most
suitable power source to safely charge the connected single-cell Li-Po or Li-Ion
battery.
The digitally controlled programmable voltage output can be used as a voltage
reference for various purposes, including A/D or D/A converters, comparators,
and other peripherals that require or can use an external reference voltage. The
programmable voltage output can be controlled over the CODEGRIP Suite.
The power OR-ing function is also supported by the PSU module: it will automatically
switch to the most appropriate power source in the case when multiple sources
are connected at once. This allows uninterrupted operation when one of the power
sources is removed. For example, the battery will continue to supply power if the USB
cable is removed, avoiding the board reset during the transition period.
The advanced design of the PSU module allows several types of power sources to be
used, offering unpreceded flexibility: when powered by a Li-Po/Li-Ion battery, it offers
an ultimate degree of autonomy. For situations where the power is an issue, it can
be powered by an external power supply, connected over the barrel connector. Power
is not an issue even if it is powered over the USB cable. It can be powered over the
USB-C connector, delivering sufficient power, even for the most power demanding
applications.
There are three power connectors, each with its unique purpose:
POWER/DEBUG, USB-C connector (2)
BATTERY, standard 2.5mm pitch XH battery connector (3)
POWER 12VDC, barrel type male 2mm x 6.5mm power connector (4)
As soon as a valid power source is connected, the development board will enter the
Stand-By mode. When the capacitive POWER button (5) is pressed, the PSU module
will start distributing the power to the rest of the development board. This is indicated
by the POWER LED indicator, located on the PSU module itself.
(1) This image is only for demonstration purpose, please do not remove the
PSU plastic cover nor touch any of the components below. The development
board can be permanently damaged.
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