Huawei ME909s Series - Power Supply Features

HUAWEI ME909s Series LTE Mini PCIe Module
Hardware Guide
Electrical and Reliability Features
Issue 02 (2016-09-07)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
44
Table 5-2 Operating and storage temperatures for the ME909s Mini PCIe module
Specification
Min.
Max.
Unit
Normal working temperatures
–20
+60
°C
Extended temperatures
[1]
–40
+85
°C
Ambient temperature for storage
–40
+85
°C

[1]: When the module works at –40°C to –20°C and +60°C to +85°C , NOT all its RF
performances comply with 3GPP specifications.

The thermal design must be implemented according to the chapter 6.6 Thermal Design
Guide. If not, the overheat protection mechanism will be triggered due to overheated Mini
PCIe and the network connection will be terminated.
5.4 Power Supply Features
5.4.1 Input Power Supply
Table 5-3 lists the requirements for input power of the ME909s Mini PCIe module.
Table 5-3 Requirements for input power for the ME909s Mini PCIe module
Parameter
Min.
Typ.
Max.
Ripple
Unit
VCC_3V3
3.2
3.8
4.2
0.05
V
Figure 5-1 Power Supply During Burst Emission
The VCC_3V3 minimum value must be guaranteed during the burst (with 3 A Peak in GSM 1
slot mode). So a low-dropout (LDO) regulator or switch power with current output of more than
3.5 A is strongly recommended for external power supply.