Telit Wireless Solutions ME310G1 - Battery Source Power Supply Design Guidelines; Thermal Design Guidelines

ME310G1 Hardware Design Guide
1VV0301588 Rev. 16 Page 32 of 95 2021-10-27
Not Subject to NDA
An example of a switching regulator with 12V input is in the below schematic:
Figure 4: Switching regulator with 12V input
4.3.1.3 Battery Source Power Supply Design Guidelines
The nominal output of the desired power supply is 3.8V and the maximum voltage is 4.2V.
So a single 3.7V Li-Ion battery type is sufficient to power the Telit ME310G1 module.
• A low ESR bypass capacitor must be included to stop the current absorption
peaks near the module. The recommended capacitor is 100μF tantalum.
• Make sure the low ESR capacitor on the power supply output is rated at least
10V.
• A protection diode must be placed near the power input. This protects the
ME310G1 from power polarity inversion. Otherwise, the battery connector must
be specifically designed to avoid polarity inversions when connecting the
battery.
• The battery must be rated to supply current peaks up to 2A.
Note: DO NOT USE any Ni-Cd, Ni-MH, or Pb batteries with the Telit
ME310G1 module. Any type of battery other than Li-Ion may result in
overvoltage issues and damage it. You can use LI-Ion, Li-Po, Li-
FePO4 secondary batteries or hi current Lithium primary batteries.
4.3.2 Thermal Design Guidelines
Worst case as reference values for thermal design of ME310G1 are:
• Average current consumption (LTE CAT M1 and NB1 modes): 700 mA
• Average current consumption (GPRS and EDGE modes): 700 mA
• Supply voltage: 4.50V