AOUT1

BOUT1

AOUT2

BOUT2

VM

VM

ISENA

ISENB

APHASE

Pre-

drive

Pre-

drive

VCP, VGD

VCP, VGD

VM

VM

+

+

–

–

PWM

PWM

ABVREF

OCP

OCP

OCP

OCP

ABDECAY

BENBL

DAC

DAC

A

A

=

=

5

5

AI[2:0]

BI[2:0]

3

AENBL

BPHASE

AI[2:0]

3

3

From Serial Interface

Step

Motor

DRV8823-Q1

SLVSBH2A – JUNE 2012 – REVISED JULY 2012

www.ti.com

FUNCTIONAL DESCRIPTION

PWM Motor Drivers

The DRV8823-Q1 device contains four H-bridge motor drivers with current-control PWM circuitry. A block

diagram showing drivers A and B of the motor control circuitry (as typically used to drive a bipolar stepper motor)

different).

Figure 2. Block Diagram

Note that there are multiple VM motor power supply pins. All VM pins must be connected together to the motor

supply voltage.

8

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Copyright © 2012, Texas Instruments Incorporated

Product Folder Link(s): DRV8823-Q1