Hardware Development Guide of Module Product
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MF206A
The power supply capacity of system board needs to be above 2.5A to satisfy the requirement of
module peak current;
The average current on the system side 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, and to prevent the module from resetting and
shutting down caused by voltage fluctuation.
Figure 4–2 Add storage capacitor to Module power supply terminal
DC3.8V
VDD_3V8
0.
47
uF
22
uF
33
0u
F
22
00
uF
33
0u
F
C1
C2
C3
C4
C5
C6
33
0u
F
Add storage capacitor to Module power supply terminal to ensure the system instantaneous power capacity
4.4
Recommended Power Reference Circuit
Option one:
Use DC\DC 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:
Can provide well transient current under 2G weak signal environment to satisfy modules requirements, to
prevent device from shutdown and Ports re-enumeration as a consequence of the supply voltage drop.
