Datasheet

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

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4 Functional Description

The TMC4671 is a fully integrated controller for ﬁeld-oriented control (FOC) of either one 3-phase brushless

motor (FOC3) or one 2-phase stepper motor (FOC2) or, as well as 1-phase DC motor or voice coil actuator

(FOC1). Containing the complete control loop core architecture (position, velocity, torque), the TMC4671

also has the required peripheral interfaces for communication with an application controller, for feedback

(digital encoder, analog interpolator encoder, digital Hall with interpolator, analog inputs for current and

voltage measurement), and helpful additional IOs. The TMC4671 supports highest control loop speed and

PWM frequencies.

The TMC4671 is the building block which takes care of all real-time critical tasks of ﬁeld-oriented motor

control. It decouples the real-time ﬁeld-oriented motor control and its real-time sub-tasks such as current

measurement, real-time sensor signal processing, and real-time PWM signal generation from the user

application layer as outlined by ﬁgure 5.

Figure 5: Hardware FOC Application Diagram

4.1 Functional Blocks

The Application interface, register bank, ADC engine, encoder engine, FOC torque PI controller, velocity PI

controller, position P controller, and PWM engine make up the TMC4671.

Figure 6: Hardware FOC Block Diagram

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