DRV10963

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SLAS955A – MARCH 2013 – REVISED JULY 2015

Table 3. Motor Handoff Speed Threshold Options

MAXIMUM SPEED (Hz)

HO_TH [3:0]

<100

12.5

1

100 to approximately 150

25

2

150 to approximately 200

37.5

3

200 to approximately 250

50

4

250 to approximately 300

62.5

5

300 to approximately 350

75

6

350 to approximately 400

87.5

7

400 to approximately 450

100

8

450 to approximately 500

112.5

9

500 to approximately 560

125

A

560 to approximately 620

137.5

B

620 to approximately 700

150

C

700 to approximately 800

162.5

D

800 to approximately 900

175

E

>900

187.5

F

Motors with higher inertia typically require a longer align time and slower accelerate rate while motors with low

inertia typically require a shorter align time and a faster accelerate rate. System tradeoffs should be done to

optimize start up reliability versus spin up time. TI recommends starting with choosing the less aggressive

decrease the spin up time while carefully monitoring the success rate.

Table 4. Motor Alignment and Accelerate Options

TAlign (ms)

RAcc (Hz/s)

TARA_TH[3:0]

40

150

1

80

140

2

120

130

3

160

120

4

200

110

5

240

100

6

280

90

7

320

80

8

360

70

9

400

60

A

440

50

B

480

40

C

520

30

D

560

20

E

600

10

F

7.3.3 Motor Direction Change

The DRV10963 can be easily configured to drive the motor in either direction by setting the input on the FR

(Forward Reverse) pin to a logic 1 or logic 0 state. The direction of commutation as described by the

commutation sequence is illustrated in Table 5.

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