To configure a measurement evaluation, follow these steps:
- Connect a shunt resister by doing
either of the following:
- Solder a 2512 resistor
across the pads of R1, R12, R13, or R9 that connects the IN+ and IN–
inputs.
- Connect an external shunt
across the IN+ and IN– terminals of J1 or J5 as shown in Figure 3-3.
- If an external
shunt is being used, then make the connections such that the
sensing location is across the shunt and there is no high
current on the sensing path. See the TI Precision Labs - Current Sense
Amplifiers: Shunt Resistor Layout video for more
information.
- Connect the IN+ and IN– terminals
in series with the load while powered off.
- When measuring more than
10A, make sure the high current path does not go through the EVM
(including the terminal blocks J1 or J5), as shown in Figure 3-3.
WARNING:
When measuring current, first make sure
that the equipment (shunt resistor, wires, connectors) can
support the amperage and power dissipation. Secondly, make sure
that the current flowing through J1 and J5 does not exceed 10A.
Failure to do so can result in damage to the EVM, or personal
injury.
The EVM can get hot.
- Connect the system ground to either
of the GNDs on terminals J1 and J5.
- Power on the system and observe the
device states and outputs through the GUI.