5 Prototyping and Bench Testing

While simulation can be helpful for the preliminary design and assessing feasibility, prototyping and bench testing is necessary for verifying actual performance. Simulation is preferred and does not have all the necessary parameters to exactly match real-world test cases. Bench tests reveal some of the possible discrepancies from preferred simulations to expect from the manufacturing and assembly process

The design presented in this application note is what was used for the TMAG5253EVM. Figure 5-1 shows the test setup used to validate the TMAG5253EVM trigger design. In this setup, the phone captures a video of the trigger moving while a computer and portable oscilloscope captures TMAG5253 device output. Both video files are then synced through an audio impulse. In the phone-captured video, a red line drawn through the hinge origin is compared against a protractor centered at the hinge origin.

From the synced video files, voltage corresponding to trigger angle was determined as shown in Figure 5-2.