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-1.000%
-0.900%
-0.800%
-0.700%
-0.600%
-0.500%
-0.400%
-0.300%
-0.200%
-0.100%
0.000%
0.100%
0.200%
0.300%
0.400%
0.500%
0.600%
0.700%
0.800%
0.900%
1.000%
0.015
0.030
0.075
0.145
0.296
0.747
1.500
2.988
7.502
14.350
19.321
Load Current (A)
PF = 1
PF = 0.5L
PF = 0.5C
EVM Performance
Figure C-1. Power Percentage Error (%) vs Load Current (A)
NOTE:
It can be seen in
that the error begins to go negative at higher current. This
phenomenon occurs because the shunt is heated by the current flowing through the traces
on the board. At low current, the higher error is mostly caused by noise that causes
instability of the readings.
62
EVM Specification and Performance
SLAU587 – August 2014
Copyright © 2014, Texas Instruments Incorporated