Datasheet

AOUT1
AOU T2
BOU T1
BOU T2
Step
Motor
VM
VM
ISEN A
ISEN B
APH ASE
Pre-
drive
Pre-
drive
VCP, VGD
VM
VM
+
-
PWM
V CP, VGD
+
-
PWM
ABVREF
OCP
OCP
OCP
OCP
ABD EC A Y
BENBL
DAC
DAC
A = 5
A = 5
AI[2:0]
BI[2:0]
3
3
AEN BL
BPH ASE
AI[2:0]
3
From Serial Interface
DRV8823
www.ti.com SLVS913D –JANUARY 2009–REVISED JANUARY 2010
FUNCTIONAL DESCRIPTION
PWM Motor Drivers
The DRV8823 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) is shown below.
Drivers C and D are the same as A and B (though the rds(on) of the output FETs is 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.
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Product Folder Link(s): DRV8823