AOUT1

AOUT2

BOUT1

BOUT2

VM

VM

AISEN

BISEN

AIN2

Pre-

drive

Pre-

drive

VCP , VGD

VM

VM

+

-

PWM

VCP , VGD

+

-

PWM

AVREF

OCP

OCP

OCP

OCP

DECAY

BIN1

DAC

DAC

A = 5

A = 5

BI[1:0]

2

AIN1

BIN2

AI[1:0]

2

BVREF

DCM

DCM

DRV8843

www.ti.com

SLVSAS8A

– APRIL 2011 – REVISED MAY 2011

FUNCTIONAL DESCRIPTION

PWM Motor Drivers

The DRV8843 contains two H-bridge motor drivers with current-control PWM circuitry. A block diagram of the

motor control circuitry is shown in Figure 1.

Figure 1. Motor Control Circuitry

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

Copyright

© 2011, Texas Instruments Incorporated

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Product Folder Link(s): DRV8843