LE910Cx Hardware Design Guide
1VV0301298 Rev.40 Page 60 of 149 2023-03-16
Not Subject to NDA
Note: Do not use any Ni-Cd, Ni-MH, and Pb battery pack types directly
connected to the LE910Cx module. Their use can lead to overvoltage
on the LE910Cx and damage it.
A bypass low ESR capacitor of adequate capacity helps to cut the current
absorption peaks; a 47-100μF capacitor is usually suitable.
Make sure the low ESR capacitor is rated at least 10V.
A protection diode should be inserted close to the power input to protect the
LE910Cx module from power polarity inversion. Otherwise, the battery connector
should be done in a way to avoid polarity inversions when connecting the battery.
The battery capacity must be at least 500 mAh to withstand the current peaks of
2A.
6.3.2. Thermal Design Guidelines
The thermal design for the power supply heat sink must be done with the following
specifications:
Average current consumption during RF transmission @PWR level max in LE910Cx
as shown in Table 20: LE910Cx Current Consumption
Average current consumption during Class10 GPRS transmission @PWR level max
as shown in Table 20: LE910Cx Current Consumption
Average GPS current consumption during GPS tracking (LTE @ idle): mA (40mA).
Note: The average consumption during transmission depends on the
power level at which the device is requested to transmit via the
network. Therefore, the average current consumption varies
significantly.
Note: The thermal design for the power supply must be made
keeping an average consumption at the max transmitting level during
calls of (LTE/HSPA)/GPRS plus average consumption in GPS
Tracking mode.
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