NE866B1_Hardware_Design_Guide
1VV0301354 Rev. 6
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25
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2018-02-28
4.3.1.3.
Battery Source Power Supply Design Guidelines
The desired nominal output for the power supply is 3.8V and the maximum voltage allowed
is 4.2V, hence a single 3.7V Li-Ion cell battery type is suited for supplying the power to the
Telit NB866B1 module.
•
A Bypass low ESR capacitor of adequate capacity must be provided in order to cut
the current absorption peaks, a 100μF tantalum capacitor is usually suited.
•
Make sure the low ESR capacitor (usually a tantalum one) is rated at least 10V.
•
A protection diode should be inserted close to the power input, in order to save the
NB866B1 from power polarity inversion. Otherwise the battery connector should be
done in a way to avoid polarity inversions when connecting the battery.
•
The selected battery should be capable of supporting the max peak currents of
~0.5A.
NOTE:
DON'T USE any Ni-Cd, Ni-MH, and Pb battery types directly
connected with NB866B1. Their use can lead to overvoltage on the
NB866B1 and damage it. USE ONLY Li-Ion battery types.