Hardware Development Guide
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ME3630 mini-PCIE
ME3630 mini-PCIE
Figure 5–1 Power Supply Current and Voltage Change under EDGE/GPRS
0
t/ms
0
0
Unit: 200mA/cell
Unit: V/cell
Voltage
Current
EDGE/GPRS TS
2-high 6-low
CLASS10
3.462ms
1.154ms
(577us/cell)
200mA
200mA
200mA
200mA
200mA
200mA
1V
2V
3V
3.6V
5.3
C
IRCUIT
R
EQUIREMENTS OF
P
OWER
S
UPPLY
O
UTPUT
Requirement:
The electrical design for the Power supply should be made ensuring it will be capable of a peak current output of at least 2.5 A.
The average current supplied by the system host needs to be above 2.0A.
When designing the PCB line, the power cable on the system board should be thick enough, and should form a good reflux with the
ground.
In the power supply circuit design, the user needs to add the large storage capacitor on the kilo level, to guarantee the transient
power supply capability as well as the system instantaneous power capacity, and to prevent the module from resetting and shutting
down caused by voltage fluctuation.
Figure 5–2 Add storage capacitor to Module power supply terminal
DC3.3V
VDD_3V3
0
.
4
7
u
F
2
2
u
F
3
3
0
u
F
2
2
0
0
u
F
3
3
0
u
F
C
1
C
2
C
3
C
4
C
5
C
6
3
3
0
u
F
5.4
Recommended Power Reference Circuit
Option one:
Use DCDC switching power supply and large storage capacitor on the kilo level to ensure the normal operation of the RF power
amplifier to withstand these current peaks without big voltage drops.
Advantage: