Smart Module Series
SA800U-WF_EVB_User_Guide 22 / 63
4.1. Power Supply
The SA800U-WF EVB can be powered by an external 12 V DC power adapter. Connect the DC power
adapter to the power jack and then the step-down converter (DC-DC converter), which is used to regulate
the 12 V DC power supply voltage to 4.2 V for powering up the module. SA800U-WF EVB can also be
powered by a Li-polymer battery through the battery connector (J0302) on the board.
Table 4: Description of Power Supply
The following figure shows the simplified power supply block diagram of SA800U-WF EVB.
Power on/off
Power to
EVB
U0303
DC-DC Converter
S0301
Li-polymer
Battery
J0302
S0302
Power switch
12 V
4.2 V
DC Power
Jack
J0301
Figure 7: Simplified Power Supply Block Diagram of SA800U-WF EVB
RefDes.
Description
J0301
Power jack on the EVB
J0302
Li-polymer battery connector
S0301
Select DC power supply or battery power supply
S0302
VBAT ON/OFF control
Содержание SA800U-WF
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Страница 13: ...Smart Module Series SA800U WF_EVB_User_Guide 12 63 Figure 2 Bottom View Figure 2 Bottom View...
Страница 62: ...Smart Module Series SA800U WF_EVB_User_Guide 61 63 1 2 3 4 5 6 7 Figure 65 Firmware Upgrade Steps...