DRV8804_16 Datasheet, PDF (11/27 Pages) Texas Instruments – Quad Serial Interface Low-Side Driver IC

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8 Application and Implementation
DRV8804
SLVSAW4F – JULY 2011 – REVISED DECEMBER 2015
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 DRV8804 can be used to drive one unipolar stepper motor.
8.2 Typical Application
VM
0.1 µF
+
100 µF
M
+±
1
VM
2
VCLAMP
3
OUT1
4
OUT2
5
GND
6
GND
7
GND
8
OUT3
9
OUT4
10
nENBL
20
nFAULT
19
SDATOUT
18
SDATIN
17
SCLK
DRV8804
16
GND
15
GND
14
GND
13
LATCH
12
NC
11
RESET
Figure 7. Typical Application Schematic
8.2.1 Design Requirements
Table 1 lists the design parameters for this design example.
DESIGN PARAMETER
Supply Voltage
Motor Winding Resistance
Motor Full Step Angle
Motor Rated Current
Table 1. Design Parameters
REFERENCE
V_M
R_L
θ_step
I_RATED
EXAMPLE VALUE
24 V
7.4 Ω/phase
1.8°/step
0.75 A
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