User's Manual

L
LE920 Hardware User Guide
1vv0301026 Rev.0 - draft4 – 2013-05-
Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved. Page 33 of 76
5.
Power Supply
The power supply circuitry and board layout are a very important part in the full product
design and they strongly reflect on the product overall performances. Read carefully the
requirements and the guidelines that will follow for a proper design.
5.1.
Power Supply Requirements
The LE920 power requirements are:
Power Supply
Nominal Supply Voltage 3.8V
Max Supply Voltage 4.2V
Supply Voltage Range 3.3V– 4.2V
LE920 current consumption
Mode Average(mA) Mode Description
SWITCHED OFF
Module supplied but switched Off
Switched Off 40 uA
IDLE mode Standby mode; no call in progress
AT+CFUN=1
WCDMA 16
Normal mode; full functionality of the module GSM 16
LTE 16
AT+CFUN=4 10
Disabled TX and RX; modules is not registered on the
network
AT+CFUN=5
WCDMA 1.7
DRx9
GSM 1.9
Operative mode (LTE)
LTE (0dBm) 203 LTE data call channel BW 5MHz,RB=1, TX = 0dBm)
LTE (22dBm) 540 LTE data call (channel BW 5MHz,RB=1, TX = 22dBm)
Operative mode (WCDMA)
WCDMA Voice 185 WCDMA voice call (TX = 10dBm)
WCDMA HSDPA (0dBm) 100 WCDMA data call (RMC, TX = 0dBm)
WCDMA HSDPA (22dBm) 390 WCDMA data call (RMC, TX = 22dBm)
Operative mode (GSM)
GSM TX and RX mode
GSM900 PL5 290
GSM Voice Call
DCS1800 PL0 170
GPRS 4TX + 1RX
GSM900 PL5
410
GPRS Sending data mode
DCS1800 PL0 320
EDGE 4TX + 1RX