Information

Texas Instruments Signal Chain Guide 2013 | 69
Monitoring and Control
Motor Drivers
Get more information: www.ti.com/product/DRV8825
Stepper Motor Controller IC
DRV8825
DRV8825 functional block diagram
The DRV8825 provides an integrated motor driver solution for printers, scanners and
other automated equipment applications. The device has two H-bridge drivers and can
drive a Bipolar stepper motor. Each of the output driver block consists of N-channel
power MOSFET configured as full H-bridges to drive the motor windings. The DRV8825
can supply up to 2.5 A peak or 1.75 A RMS output current (with proper heatsinking at
24 V and 25°C).
Key Features
• PWMmicrosteppingmotordriver
Built-in microstepping indexer
supports up to 32 microsteps
Supports slow, fast, and mixed
decay modes
• 2.5Amaximumdrivecurrentat
24 V, 25°C
•
8Vto45Voperatingsupply
voltage range
•
Advancedon-chipprotection
Over-current
Thermal
Under-voltage
Applications
• Automatictellermachines
• Moneyhandlingmachines
• Videosecuritycameras
• Printers
• Scanners
• Officeautomationmachines
• Gamingmachines
Step
Motor
ISEN B
ISEN A
BOUT 2
AOUT 2
BOUT 1
AOUT 1
VM B
VM A
VM
VM
VCP
CP 1
CP 2
nF AU LT
nHOME
nSLEEP
nRESET
MODE 2
MODE 1
MODE 0
DIR
STEP
AVREF
V3P3OUT
BVREF
nENBL
GND GND
HS Gate
Drive
Int
VCC
LS Gate
Drive
Indexer/
Control
Logi c
Motor
Driver
B
Motor
Driver
A
Charge
Pum p
Thermal
Shutdown
3.3 V
3.3 V
0.22 µF
0.22 µF
Internal
Reference
and Registers