8.2.1 Design Requirements

Table 3 lists several key motor characteristics and recommended ranges which the DRV10964 is capable of driving. However, that does not necessarily mean motors outside these boundaries cannot be driven by DRV10964.

Recommended ranges listed in Table 3 can serve as a general guideline to quickly decide whether DRV10964 is a good fit for an application. Motor performance is not ensured for all uses.

Rm - Motor phase resistance between phase to phase;

Lm - Motor phase to phase inductance between phase to phase;

Kt - Motor BEMF constant from phase to center tape;

f_{FG_max} - Maximum electrical frequency. Maximum motor speed can be calculated from:

• If FGS = 1, RPM = (f_{FG_max} × 3 x 60)/ number of pole pairs
• If FGS = 0, RPM = (f_{FG_max} × 120)/ number of pole pairs

8.2.2 Detailed Design Procedure

1. Refer to Design Requirements and make sure your system meets the recommended application range.

2. Refer to the DRV10964 Tuning Guide and measure the motor parameters.

3. Refer to the DRV10964 Tuning Guide. Configure the parameters using DRV10964 GUI, and optimize the motor operation. The Tuning Guide takes the user through all the configurations step by step, including: start-up operation, closed-loop operation, current control, initial positioning, lock detection, and anti-voltage surge.

4. Build your hardware based on Layout Guidelines.

5. Connect the device into system and validate your system solution

8.2.3 Application Curves

Figure 17. Reference PCB Sinusoidal Current Profile

Figure 19. Reference PCB Open Loop and Close Loop

NOTE: FG_OUT Signal Being Held HIGH During Locked Rotor Condition (Stall)

Figure 18. Reference PCB Start-Up (Align-Acceleration) Profile

Figure 20. Reference PCB Closed Loop