DRV8823_16 Datasheet, PDF (12/32 Pages) Texas Instruments – 4-Bridge Serial Interface Motor Driver

DRV8823
SLVS913E – JANUARY 2009 – REVISED JANUARY 2016
www.ti.com
7.3 Feature Description
7.3.1 PWM Motor Drivers
The DRV8823 contains four H-bridge motor drivers with current-control PWM circuitry. Figure 10 shows a block
diagram with drivers A and B of the motor control circuitry (as typically used to drive a bipolar stepper motor).
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 10. Block Diagram With Drivers A and B
NOTE
The device has multiple VM motor power supply pins. All VM pins must be connected
together to the motor supply voltage.
12
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