X221, -LC, -AI
TECHNICAL REFERENCE MANUAL
VERSION: 1.4
Page 9 of 38
3.4
Power consumption
Description
X221-LC (Rev 2) X221-AI (Rev 2)
X221 (Rev 4)
X221-AI (Rev 4)
Carrier board logic
1-2W
1-2W
1-2W
1-2W
1.8/3.3/5V power converter
efficiency
>90%
>90%
>90%
>90%
Power in converter efficiency
-
>90%
-
>90%
If you intend to use MAXN mode, the LC version is better suited because it does not have a power
limiting input converter. The full version features high voltage power in converter with an output of
12V 5A, so that a maximum power setting of 30W is recommended.
It is possible to bypass the power input converter by moving two 0805 beads as seen in the picture
below. With this patch the input voltage is limited to 12V as the power input converter is bypassed.
