I'm willing to control 36v 3 phase bldc motor. I have bought stm32f401re and evalstdrive101. I have doubt in the working of open J2 working mode. Can you please elaborate how this mode works?

AFirt.1 · ‎2021-12-22

Cristiana SCARAMEL · ‎2022-01-10

Hello @AFirt.1 and welcome to the ST Community.

As reported in the EVALSTDRIVE101 user manual UM2781 the J2 jumper allows to short the DT/MODE pin of the STDRIVE101 to GND, thus enabling the INH/INL mode.

If left open, the STDRIVE101 is configured in EN/IN mode.

When the STDRIVE101 is configured with ENx/INx input strategy, the half-bridge “x�? is enabled or disabled by ENx signal and its status is determined by INx signal.

Morevoer, the deadtime is set by R6; the default 51 kΩ resistor gives a deadtime approximately around 570 ns.

You can find more details about the control logic in the STDRIVE101 datasheet (page 17 and following).

Let me know if I fully answered your question, if so please "Select as Best" label.

Cristiana SCARAMEL · ‎2022-01-24

Hi @AFirt.1 any feedback? Have I solved your doubts?