4 Operation

The following are instructions to set up and use the TMCS1108EVM. For the following instructions, y = A to D for the A1 to A4 gain variants, respectively. Figure 4-1 shows an example of a simple, low-side forward current setup on the A1B (50 mV/A) gain variant. Reverse current can be measured on the TMCS1108nB devices by switching the placement of the hot-supply and electronic load along with reversing their polarities. The EVM has isolation, and external supplies are distinguished by hot for load and cold for DUT supply. The hot supply can be isolated and at a different potential than the cold supply.

Figure 4-1 Low-Side Forward Current Setup

1. For greater maneuverable flexibility, break apart the EVM sub boards along the score lines. Otherwise, the board can be left intact.
2. Attach the high-current lug connectors to IN+ and IN– of the gain version to be tested.
3. Connect the terminals of an external cold supply to the GND and VCC test points on the EVM gain variant of choice. Be sure to connect GND first and make sure that the external cold supply is between 3 V and 5.5 V.
4. Connect the input per Section 4.1.