SLVSD14A June 2017 – June 2020 DRV10983-Q1
The estimated BEMF used to control the drive state of the motor has two zero-crosses every electrical cycle. The DRV10983-Q1 device can be configured to update the drive state either once every electrical cycle or twice for every electrical cycle. When AdjMode is programmed to 1, half-cycle adjustment is applied. The control logic is triggered at both the rising edge and falling edge. When AdjMode is programmed to 0, full-cycle adjustment is applied. The control logic is triggered only at the rising edge (see Figure 27).
Half-cycle adjustment provides a faster response when compared with full-cycle adjustment. Use half-cycle adjustment whenever the application requires operation over large dynamic loading conditions. Use the full-cycle adjustment for low-current (<1 A) applications because it offers more tolerance for current-measurement offset errors.