TMC2226-SA-T the problem of usage

Thread Summary

The user encountered an issue where the OB1/2, OA1/2 pins of a chip in a two-layer PCB were equal to the power supply voltage VS after power-on, and the chip burned when EN was enabled. The final answer suggested checking which pin was burned, noting that the issue is unrelated to the PCB layer count. The user found that the VS pin burned due to an undersized capacitor. Additionally, the user observed that the DIAG-connected indicator light flashed during power-on and power-off sequences, which may require further investigation according to the datasheet's Figure 15.1.
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