DRV8811_15 Datasheet, PDF (11/32 Pages) Texas Instruments – DRV8811 Stepper Motor Controller IC

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DRV8811
SLVS865I – SEPTEMBER 2008 – REVISED JANUARY 2015
8.3 Feature Description
8.3.1 PWM H-Bridge Drivers
DRV8811 contains two H-bridge motor drivers with current-control PWM circuitry, and a microstepping indexer. A
block diagram of the motor control circuitry is shown below.
RCA
VGD
VCP
PWM
Pre-
drive
OCP
VM
VMA
AOUT1
AOUT2
+
Step
Motor
–
+
–
OCP
A=8
ISENA
DAC
RCB
Control /
Indexer
Logic
VGD
VCP
PWM
Pre-
drive
OCP
OCP
A=8
VM
VMB
BOUT1
BOUT2
ISENB
DAC
DECAY
VREF
Figure 6. Motor Control Circuitry
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