DRV8880_15 Datasheet, PDF (37/48 Pages) Texas Instruments – DRV8880 2-A Stepper Motor Driver With AutoTune™

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10 Layout
DRV8880
SLVSD18A – JUNE 2015 – REVISED JULY 2015
10.1 Layout Guidelines
Each VM terminal must be bypassed to GND using a low-ESR ceramic bypass capacitors with recommended
values of 0.1 μF rated for VM. These capacitors should be placed as close to the VM pins as possible with a
thick trace or ground plane connection to the device GND pin.
The VM pin must be bypassed to ground using a bulk capacitor rated for VM. This component may be an
electrolytic.
A low-ESR ceramic capacitor must be placed in between the CPL and CPH pins. A value of 0.1 μF rated for VM
is recommended. Place this component as close to the pins as possible.
A low-ESR ceramic capacitor must be placed in between the VM and VCP pins. A value of 0.47 μF rated for 16
V is recommended. Place this component as close to the pins as possible.
Bypass V3P3 to ground with a ceramic capacitor rated 6.3 V. Place this bypassing capacitor as close to the pin
as possible.
The current sense resistors should be placed as close as possible to the device pins in order to minimize trace
inductance between the pin and resistor.
10.2 Layout Example
0.1 µF
0.1 µF
0.47 µF
0.1 µF
CPL
CPH
VCP
VM
AOUT1
AISEN
AOUT2
BOUT2
BISEN
BOUT1
VM
GND
ATE
VREF
GND
TRQ0
TRQ1
M0
M1
STEP
DIR
ENABLE
DECAY0
DECAY1
nFAULT
nSLEEP
TOFF
V3P3
0.1 µF
Figure 36. Layout Recommendation
Copyright © 2015, Texas Instruments Incorporated
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