Datasheet

TMC4671 Datasheet • IC Version V1.3 | Document Revision V2.00 • 2020-Apr-17

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Info

Measured BBM times at MOS-FET gates diﬀer from programmed BBM times due

to driver delays and possible additional gate driver BBM times. The programmed

BBM times are for the digital control signals.

Note

Too short BBM times cause electrical shortcuts of the MOS-FET bridges - so called

shoot through - that short the power supply and might damage the power stage

and the power supply.

4.9.7 Space Vector PWM (SVPWM)

A single bit enables the Space Vector PWM (SVPWM). No further settings are required for the space vector

PWM - just ON or OFF. The power on default for the SVPWM is OFF. Space Vector PWM can be enabled

to maximize voltage utilization in the case of an isolated star point of the motor. If the star point is not

isolated, SVPWM might cause unintended current ﬂows through the star point. Space Vector PWM is only

used for three-phase motors. For other motors the SVPWM must be switched oﬀ.

Note

For engineering samples TMC4671-ES, the Space Vector PWM does not allow

higher voltage utilization. This is ﬁxed for the release version TMC4671-LA.

5 Safety Functions

Diﬀerent safety functions are integrated and mapped to status bits. A programmable mask register selects

bits for activation of the STATUS output.

Internal hardware limiters for real time clipping and monitoring of interim values are available. LIMIT or

LIMITS is part of register names of registers associated to internal limiters. Please refer to table 23.

Bit Source

0 pid_x_target_limit

1 pid_x_target_ddt_limit

2 pid_x_errsum_limit

3 pid_x_output_limit

4 pid_v_target_limit

5 pid_v_target_ddt_limit

6 pid_v_errsum_limit

7 pid_v_output_limit

8 pid_id_target_limit

9 pid_id_target_ddt_limit

10 pid_id_errsum_limit

11 pid_id_output_limit

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