Power Tree - Arduino Nicla Sense ME Product Reference Manual

Arduino® Nicla Sense ME

4.10 Power Tree

Nicla Sense ME Back View
The Arduino Nicla Sense ME can be powered via micro USB (J7), ESLOV (J5) or VIN. This is converted into the
relevant voltages via the BQ2512BAYFPR IC (U9). A Schottky diode provides reverse polarity protection to the USB
and ESLOV voltages. When voltage is supplied via the micro USB, a linear 3.3V regulator also provides power to the
SAMD11 microcontroller used for programming the board as well as for JTAG and SWD. The LED driver (U8) and
RGB LEDs (DL1) are driven by a boost voltage of 5V. All other components operate off the 1.8V rail regulated by a
buck converter. PMID acts as an OR switch between VIN and BATT and operates the LED driver. All I/O broken out to
the pins are fed through a bi-directional voltage translator running at V .
DDIO_EXT
Additionally, the BQ25120AYFPR (U9) also provides support for a single cell 3.7V LiPo/Li-ion battery pack connected
to J4, allowing the use of the board as a wireless sensor network. The battery charging current is set to 40mA with a
termination current of 4mA (10%).
13 / 24 Arduino® Nicla Sense ME Modified: 13/08/2024