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Power Supply
IO Connector
Power Supply
The RAK1920 module supports the 5 V option. By default, the 3.3 V_S is used as the 3.3 V power source of
sensors. The module integrates a boost converter from the VBAT to 5 V. The VBAT is the battery output voltage,
usually between 3.7 V and 4.2 V. The EN pin enables the boost converter and is controlled by the WisBlock Core
module of the overall solution.
⚠
WARNING
The 3V3_S has to be enable via WB_IO2 GPIO. Otherwise, the module will not work.
Figure 13: Power supply
IO Connector
Figure 14: IO Connector
The RAK1920 module uses only a subset of all the pins available in the IO connector. These are shown in the
table below:
