List of figures

AN4370

4/23

DocID025336 Rev 1

List of figures

Figure 1.

BEMFIP block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Figure 2.

BEMF detection stepping of BEMFCNT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Figure 3.

Ringing noise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Figure 4.

BEMFCNT update event. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Figure 5.

SPI command frame structure (SDI). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Figure 6.

PRE-DRIVE tests functional block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Figure 7.

PRE-DRIVE test example: Phase 1 disconnected . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Figure 8.

PRE-DRIVE test example: Phase 1 connected . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Figure 9.

Difference between charge pump output voltage and input supply voltage vs. input supply

Figure 10.

Supply current at VS pin vs. input supply voltage VVS as a function of charge pump load

Figure 11.

Reverse battery current flow through the device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21