DRV8846_15 Datasheet, PDF (26/35 Pages) Texas Instruments – DRV8846 Dual H-Bridge Stepper Motor Driver

DRV8846
SLLSEK2 – JUNE 2014
www.ti.com
10 Power Supply Recommendations
The DRV8846 is designed to operate from an input voltage supply (VM) range between 4 and 18 V. A 0.1-μF
ceramic capacitor rated for VM must be placed as close to the DRV8846 as possible. In addition, a bulk 10-μF
capacitor must be included on VM.
11 Layout
11.1 Layout Guidelines
The VM terminal should be bypassed to GND using a low-ESR ceramic bypass capacitor with a recommended
value of 10 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.
Bypass VINT to ground with a ceramic capacitor rated 6.3 V. Place this bypassing capacitor as close to the pin
as possible.
11.2 Layout Example
R_AISEN
R_BISEN
AOUT1
AISEN
AOUT2
BOUT2
BISEN
BOUT1
2.2 µF
GND
VINT
NC
VM
VREF
DIR
10 µF
0.1 µF
26
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