DRV8880_15 Datasheet, PDF (32/48 Pages) Texas Instruments – DRV8880 2-A Stepper Motor Driver With AutoTune™

DRV8880
SLVSD18A – JUNE 2015 – REVISED JULY 2015
8 Application and Implementation
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NOTE
Information in the following applications sections is not part of the TI component
specification, and TI does not warrant its accuracy or completeness. TI’s customers are
responsible for determining suitability of components for their purposes. Customers should
validate and test their design implementation to confirm system functionality.
8.1 Application Information
The DRV8880 is used in stepper control.
8.2 Typical Application
The following design procedure can be used to configure the DRV8880.
10 kŸ
0.47 µF
DRV8880PWP
28
1
GND
CPL
27
2
0.1 µF
TRQ0
CPH
26
3
TRQ1
VCP
25
4
0.47 µF
M0
VM
24
5
M1
AOUT1
23
6 ^{250 mŸ}
STEP
AISEN
22
7
DIR
AOUT2
21
8
ENABLE
BOUT2
20
9 ^{250 mŸ}
DECAY0
BISEN
19
10
DECAY1
BOUT1
18
11
nFAULT
VM
17
12
nSLEEP
GND
16
13
TOFF
ATE
15
14
V3P3
VREF
R1
R2
VM
0.1 µF
Step
Motor
+-
0.1 µF
VM
+
100 µF
Figure 28. Typical Application Schematic
8.2.1 Design Requirements
Table 11 gives design input parameters for system design.
Table 11. Design Parameters
DESIGN PARAMETER
Supply voltage
Motor winding resistance
Motor winding inductance
Motor full step angle
Target microstepping level
Target motor speed
REFERENCE
VM
R_L
L_L
θ_step
n_m
v
EXAMPLE VALUE
24 V
0.8 Ω/phase
1.4 mH/phase
1.8°/step
1/8 step
120 rpm
32
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