DRV8814 Datasheet, PDF (7/16 Pages) Texas Instruments – DC MOTOR DRIVER IC 2.5-A Maximum Drive Current at 24 V, 25°C

DRV8814
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FUNCTIONAL DESCRIPTION
SLVSAB9C – MAY 2010 – REVISED MARCH 2011
PWM Motor Drivers
The DRV8814 contains two H-bridge motor drivers with current-control PWM circuitry. A block diagram of the
motor control circuitry is shown in Figure 1.
AENBL
APHASE
DECAY
AI[1:0]
VCP, VGD
OCP
Pre-
drive
PWM
DAC
2
OCP
-
+
A=5
VM
VM
AOUT1
AOUT 2
DCM
AISEN
AVREF
BENBL
BPHASE
BI[1:0]
BVREF
VCP, VGD
OCP
Pre-
drive
PWM
DAC
2
OCP
-
+
A =5
VM
VM
BOUT 1
BOUT 2
DCM
BISEN
Figure 1. Motor Control Circuitry
Note that there are multiple VM pins. All VM pins must be connected together to the motor supply voltage.
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