DRV8886AT Datasheet, PDF (33/40 Pages) Texas Instruments – 2-A Stepper Motor Driver With Integrated Current Sense and AutoTune Technology

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10 Layout
DRV8886AT
SLVSDO1 – JANUARY 2017
10.1 Layout Guidelines
The VM pin should be bypassed to GND using a low-ESR ceramic bypass capacitor with a recommended value
of 0.01 µF rated for VM. This capacitor should be placed as close to the VM pin 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 can be an
electrolytic capacitor.
A low-ESR ceramic capacitor must be placed in between the CPL and CPH pins. A value of 0.022 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 0.22 µF rated for 16
V is recommended. Place this component as close to the pins as possible.
Bypass the AVDD and DVDD pins to ground with a low-ESR ceramic capacitor rated 6.3 V. Place this bypassing
capacitor as close to the pin as possible.
10.2 Layout Example
0.01 µF
0.01 µF
CPL
CPH
VCP
VM
AOUT1
PGND
AOUT2
BOUT2
PGND
BOUT1
VM
GND
DECAY
TRQ
M1
M0
DIR
STEP
ENABLE
nSLEEP
RREF
nFAULT
DVDD
AVDD
Figure 33. Layout Recommendation
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