DRV8841_15 Datasheet, PDF (14/28 Pages) Texas Instruments – Dual H-Bridge Driver IC

DRV8841
SLVSAC0F – MAY 2010 – REVISED DECEMBER 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 DRV8841 can be used to control a bipolar stepper motor. The PWM interface controls the outputs and
current control can be implemented with the internal current regulation circuitry. Detailed fault reporting is
provided with the internal protection circuits and nFAULT pin.
8.2 Typical Application
0.01uF
CP1
CP2
DRV8841
GND
BI1
VCP
BI0
0.01uF
1MŸ 0.1uF
VMA
AI1
VM
+
100uF
Stepper
Motor
+
-
200mŸ
200mŸ
0.01uF
V3P3OU
T
50kŸ
30kŸ
AOUT1
ISENA
AOUT2
BOUT2
ISENB
BOUT1
VMB
AVREF
BVREF
GND
AI0
BIN2
BIN1
AIN1
AIN2
DECAY
nFAULT
nSLEEP
nRESET
V3P3OUT
V3P3OU
T
10kŸ
V3P3OU
T
0.47uF
Figure 7. Typical Application Schematic
14
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