Configuring The Output Mode - Texas Instruments INA223EVM User's Manual And Software Tutorial

INA223EVM Software Overview
5.2.2 Output Mode
The output mode configuration allows the user to toggle between different output signals generated from
the INA223, and is shown in the red box of
Shunt Voltage, Bus Voltage, Supply Power, and Load Power.
The two power output modes of the INA223EVM is used to select whether the signal representing the
power being supplied by the power supply or the power being consumed by the load is made available at
the output pin. When the Supply Power option is selected, the V
VIN+ pin of the INA223 and combined with the V
The Load Power option operates in a similar manner to the Supply Power option, except that the V
measurement is taken internally at the VIN– pin of the INA223. The power being consumeed by the load
is found by taking the V
are very similar with the exception being that the Load Power option removes the power being dissipated
across the shunt resistor from the result. At high current shunt gains, the differences between Load Power
and Supply Power are negligible. At low current shunt gains, the power dissipated across the sense
resistor can result in a noticeable difference between these two results.
16
INA223EVM User's Guide and Software Tutorial
Figure
Figure 17. Configuring the Output Mode
measurement from the VIN– pin. The Supply Power and Load Power results
BUS
Copyright © 2012, Texas Instruments Incorporated
17. The four options available for output mode are:
measurement is taken internally at the
BUS
measurement to calculate the power being supplied.
SHUNT
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BUS
SBOU125 – June 2012
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