To assess whether the expected load matches the measured load, use a precision shunt resistor rated for the maximum intended current in series with the DUT. The precision shunt should have a kelvin connection where the generated sense voltage can be measured by a precision multimeter, such as the 3458a multimeter. Sensing the shunt voltage is preferred as a typical multimeter may have a current limit far below 20 A. Additionally, some meters have better voltage measurement precision than current measurement precision.

For evaluating performance when the DUT is subjected to quick current pulses, use short, large-gauge wire or short bus bars to reduce the inductance and resistance between the hot-supply, load, and EVM. By minimizing the inductance, the rate of load slew can be increased. If assessing the performance over large transient current spikes (>20 A) is desired, be sure to use a supply with sufficient voltage headroom to accommodate the series resistance of the wires/bus bars, board planes, and DUT lead frame resistance. A large capacitor bank between the supply terminals should be used to ensure there is an adequate charge reservoir available to prevent the supply from drooping and help supply the large current inrush through the device.

If assessing temperature performance is desired, use wide, thin bus bars to reduce the thermal sinking ability of the system and minimize the inductance of the system. While the board provides an onboard temperature sensor, board temperature may not be an exact indicator of DUT temperature. More precise measurements can be obtained by placing a layer of thermally conductive grease on top of the DUT package and placing a thermal sensor directly on the thermal grease.