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P o w e r s u p p l y
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Input power jack,
J3
Input power
supply
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The development board provides a 3.3V
power supply or an AC wall adapter supplies input power to the development board.
The required input voltage range is 9–30V
The input power jack, J3, is a barrel connector that accepts 9-30 VDC. The power
jack is labeled J3 on the development board. This figure schematically represents
the power jack's polarity:
Ground
9-30VDC +/- 5%
The output current of this regulator is limited to 2.4 amps and the Digi Connect Wi-
Wave module draws no more than .750 amps. Using these values as a guideline, and
using an 80% efficiency for the switching regulator, the input power supply should
be rated to provide at least 3 watts of power.
The development board can use USB power as the power source for the
Important:
3.3V regulator. This is accomplished by simply connecting the USB
A B O U T T H E D E V E L O P M E N T B O A R D
switching power supply. Either a bench
DC
.
DC
Power supply
21
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