Datasheet

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

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enabling the determination of the direction of revolution. Some encoder vendors associate counts per

revolution (CPR) or pulses per revolution associated to PPR acronym.

The TMC4671 uses Positions Per Revolution (PPR) as encoder parameter.

3.5.9 Proportional Integral (PI) Controllers for Closed Loop Current Control

Last but not least, two PI controllers are required for the FOC. The TMC4671 is equipped with two PI

controllers - one for control of torque generating current I_Q and one to control current I_D to zero.

3.5.10 Pulse Width Modulation (PWM) and Space Vector Pulse Width Modulation (SVPWM)

The PWM power stage is a must-have for energy eﬃcient motor control. The PWM engine of the TMC4671

just needs a couple of parameters to set PWM frequency fPWM and switching pauses for both high side

switches tBBM_H and low side switches tBBM_L. Some control bits are for the programming of power

switch polarities for maximum ﬂexibility in the selection in gate drivers for the power MOS-FETs. An

additional control bit selects SVPWM on or oﬀ. The TMC4671 allows for change of PWM frequency by a

single parameter during operation.

With this, the TMC4671 is advanced compared to software solutions where PWM and SVPM conﬁguration

of CPU internal peripherals normally needs settings of many parameters.

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