xE922-3GR Hardware User Guide
1VV0301272
Rev.0.8 2017-01-05
Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights
Reserved.
Page 45 of 112
Current
max
Pull-downr resistor Rpd
200
ohm
DC/DC is OFF
Switching
frequency
F_dcdc
-3%
3.2
+3%
MHz
Note:
1V8_OUT is also applied internally the module feeding several I/O peripherals, memory interface and analog
RF parts (depending on use case).
Care should be exercised to keep external current dissipation limited in order not to exceed the maximum
output current of the DC/DC regulator.
1V8_OUT external usage is primarily targeted for IO reference level or supplying levelshift devices.
5.3.
Typical system power consumption
Test conditions:
·
room temperature 22deg, still air, no heatsink
·
V_BAT/V_BAT_PA= 3.8V
·
50 ohm antenna load impedance
·
Display and camera supply current excluded (separately powered)
WLAN related use cases are executed with WiFi hotspot serving the DUT as only client, inside RF shield box.
These are typical power consumption measured at room temperature, with the module mounted on Telit
’s
reference carrier board, no heatsink applied.
At higher ambient temperature condition one can expect higher current consumption due to increasing leakage
currents.
SW release: MR1 // sf3gr_telit_he922-flashfiles-eng.android_a60_ww33_camera_orientation.
Type
description
[mA]
off
Module powered off
0.15
idle
Idle Display On
200
WLAN Active Idle (3G cell registered)
18
3G Active Idle
21