DRV8823-Q1 Datasheet, PDF (8/18 Pages) Texas Instruments – 4-BRIDGE SERIAL INTERFACE MOTOR DRIVER

DRV8823-Q1
SLVSBH2A – JUNE 2012 – REVISED JULY 2012
FUNCTIONAL DESCRIPTION
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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)
is shown in Figure 2. Drivers C and D are the same as A and B (though the R_DS(ON) of the output FETs is
different).
From Serial Interface
AENBL
APHASE
ABDECAY
AI[2:0]
AI[2:0]
VCP, VGD
OCP
Pre-
drive
PWM
3
DAC
3
OCP
–
+
A =5
VM
VM
AOUT1
AOUT2
Step
Motor
ISENA
ABVREF
BENBL
BPHASE
BI[2:0]
VCP, VGD
OCP
Pre-
drive
PWM
DAC
3
OCP
–
+
A =5
VM
VM
BOUT1
BOUT2
ISENB
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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