NE310L2 Hardware Design Guide
1VV0301711 Rev. 2
Page 24 of 64
2021-06-22
For Car applications a spike protection diode should be inserted close to the power
input, in order to clean the power supply from the spikes.
An example of switching regulator with 12V input is in the below schematic:
Figure 3
:
Recommended Circuit
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 NE310L2 module.
A Bypass low ESR capacitor of adequate capacity must be provided in order to cut
the current absorption peaks, a 100
μ
F tantalum capacitor is usually suited.
Make sure the low ESR capacitor (usually a tantalum one) is rated of at least 10V.
A protection diode should be inserted close to the power input, in order to save the
NE310L2 from power polarity inversion. Otherwise the battery connector should
be done in a way to avoid polarity inversions when connecting the battery.
The battery must be rated to supply current peaks up to TBD A.
Note: DO NOT USE any type of Ni-Cd, Ni-MH, and Pb battery directly
connected to NE310L2. Their use can lead to overvoltage on the
NE310L2 and damage it. USE ONLY Li-Ion battery types.
Содержание NE310L2
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