DRV8823_15 Datasheet, PDF (7/21 Pages) Texas Instruments – 4-BRIDGE SERIAL INTERFACE MOTOR DRIVER

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).
From Serial Interface
AEN B L
APH A SE
A BD EC A Y
A I[2:0]
A I[2:0]
VCP, VGD
OCP
Pre-
driv e
PW M
3
DAC
3
OCP
-
+
A =5
VM
VM
A OU T1
A OU T2
Step
Motor
ISENA
A BVR EF
B EN BL
BPH A SE
B I[2:0]
V CP, VGD
OCP
Pre-
driv e
PW M
DAC
3
OCP
-
+
A =5
VM
VM
BOU T1
B OU T2
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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Product Folder Link(s): DRV8823
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