DRV8811_11 Datasheet, PDF (12/22 Pages) Texas Instruments – STEPPER MOTOR CONTROLLER IC

DRV8811
SLVS865G – SEPTEMBER 2008 – REVISED MAY 2010
FULL STEP
USM = 00
1/2 STEP
USM = 01
1
1/4 STEP
USM = 10
1
2
1
2
3
4
3
5
6
2
4
7
8
5
9
10
3
6
11
12
7
13
14
4
8
15
16
1/8 STEP
USM = 11
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
www.ti.com
AOUTx
BOUTx
CURRENT
CURRENT
(% FULL-SCALE) (% FULL-SCALE)
100
0
98
20
92
38
83
56
71
71
56
83
38
92
20
98
0
100
–20
98
–38
92
–56
83
–71
71
–83
56
–92
38
–98
20
–100
0
–98
–20
–92
–38
–83
–56
–71
–71
–56
–83
–38
–92
–20
–98
0
–100
20
–98
38
–92
56
–83
71
–71
83
–56
92
–38
98
–20
STEP ANGLE
(DEGREES)
0
11.325
22.5
33.75
45 (home state)
56.25
67.5
78.75
90
101.25
112.5
123.75
135
146.25
157.5
168.75
180
191.25
202.5
213.75
225
236.25
247.5
258.75
270
281.25
292.5
303.75
315
326.25
337.5
348.75
RESETn, ENABLEn and SLEEPn Operation
The RESETn pin, when driven active low, resets the step table to the home position. It also disables the H-bridge
drivers. The STEP input is ignored while RESETn is active.
The ENABLEn pin is used to control the output drivers. When ENABLEn is low, the output H-bridges are
enabled. When ENABLEn is high, the H-bridges are disabled and the outputs are in a high-impedance state.
Note that when ENABLEn is high, the input pins and control logic, including the indexer (STEP and DIR pins) are
still functional.
The SLEEPn pin is used to put the device into a low power state. If SLEEPn is low, the H-bridges are disabled,
the gate drive charge pump is stopped, and all internal clocks are stopped. In this state all inputs are ignored
until the SLEEPn pin returns high.
12
Submit Documentation Feedback
Product Folder Link(s): DRV8811
Copyright © 2008–2010, Texas Instruments Incorporated