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shows the Vela IF820 development board power supply architecture.
Figure 4: Vela IF820 development board power architecture
The Vela IF820 radio module requires one primary power source that supply all other internal power rails
– VBAT and VDDIO.
The VDDIO source provides power for the radio IO portions, and the VBAT source provides power for all other radio needs.
The DVK provides 3.3V power for both VDDIO and VBAT by a 5V to 3.3V on board regulator. 5V input can be either supplied
from Micro USB or external source by jumper (J6) cap installing or not. Installing the jumper cap on J6 (default) means 5V can
be drawn from Micro USB. If an external source is preferred, the jumper should be removed from J6 and an external source
should connected to J6.
See
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for an example of the external 5V power supply through the external source.
Figure 5: Example of the external 5V power supply through the external source
Summary of Contents for Vela IF820
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