1/2 step

1/4 step

1/8 step

VREF phase A

VREF phase B

Sequencer value

2

3

5

70.711%

70.711%

0010000000

6

83.147%

55.557%

0010100000

4

7

92.388%

19.509%

0011100000

8

98.079%

19.509%

0011100000

3

5

9

100%

0%

0100000000

10

98.079%

-19.509%

0100100000

6

11

92.388%

-38.268%

0101000000

12

83.147%

-55.557%

0101100000

4

7

13

70.711%

-70.711%

0110000000

14

55.557%

-83.147%

0110100000

8

15

38.268%

-92.388%

0111000000

16

19.509%

-98.079%

1000100000

5

9

17

0%

100%

1000000000

18

-19.509%

-98.079%

1000100000

10

19

-38.268%

-92.388%

1001000000

20

-55.557%

-83.147%

1001100000

6

11

21

-70.711%

-70.711%

1010000000

22

-83.147%

-55.557%

1010100000

12

23

-92.388%

-38.268%

1011000000

24

-98.079%

-19.509%

1011100000

7

13

25

-100%

0%

1100000000

26

-98.079%

19.509%

1100100000

14

27

-92.388%

38.268%

1101000000

28

-83.147%

55.557%

1101100000

8

15

29

-70.711%

70.711%

1110000000

30

-55.557%

83.147%

1110100000

16

31

-38.268%

92.388%

1111000000

32

-19.509%

98.079%

1111100000

Note:

The positive number means that the output current is flowing from OUTx1 to OUTx2, vice versa for a negative

value.

6.3

PWM current control

The device implements two independent PWM current controllers, one for each full bridge.

based on the sequencer value (see Table 9. Target reference and current direction according to sequencer value

(full-step mode) and Table 10. Target reference and current direction according to sequencer value (not full-step

mode)).

sequence is performed.

STSPIN220

PWM current control

DS11633 - Rev 4

page 12/27