User Guide

ME910G1 Preliminary HW Design Guide
1VV0301593 Rev.2 Page 33 of 95 2020-01-13
NOTE:
DON'T USE any Ni-Cd, Ni-MH, and Pb battery types directly
connected with ME910G1. Their use can lead to overvoltage on the
ME910G1 and damage it. USE ONLY Li-Ion battery types.
4.3.2. Thermal Design Guidelines
Worst case as reference values for thermal design of ME910G1 are:
• Average current consumption: 250 mA (LTE CAT M1 and NB1 modes)
• Average current consumption: 600 mA (GPRS and EDGE modes)
• Supply voltage: 4.50V
NOTE:
Make PCB design in order to have the best connection of GND pads
to large surfaces of copper.
NOTE:
The ME910G1 includes a function to prevent overheating.
4.3.3. Power Supply PCB layout Guidelines
As seen on the electrical design guidelines the power supply shall have a low ESR
capacitor on the output to cut the current peaks on the input to protect the supply from
spikes The placement of this component is crucial for the correct working of the circuitry.
A misplaced component can be useless or can even decrease the power supply
performances.
• The Bypass low ESR capacitor must be placed close to the Telit ME910G1 power
input pads or in the case the power supply is a switching type it can be placed close
to the inductor to cut the ripple provided the PCB trace from the capacitor to the