7.3.3 Power-On Time

After applying V_CC to the DRV5021-Q1, t_on must elapse before the OUT pin is valid. In case 1 (Figure 13) and case 2 (Figure 14), the output is defined assuming that magnetic field B_APPLIED > B_OP, and B_APPLIED < B_RP, respectively.

Figure 13. Case 1: Power On When B > B_OP

Figure 14. Case 2: Power On When B < B_RP

If the device is powered on with B_RP < B_APPLIED < B_OP, then the device output remains in indeterminate state until the magnetic field changes. After the change in magnetic field results in a condition that meets either B_OP < B_APPLIED or B_RP > B_APPLIED, the output turns to valid state after t_d time elapses. Case 3 (Figure 15) and case 4 (Figure 16) show examples of this behavior.

Figure 15. Case 3: Power On When B_RP < B < B_OP, Followed by B > B_OP

Figure 16. Case 4: Power On When B_RP < B < B_OP, Followed by B < B_RP