DRV8843_15 Datasheet, PDF (8/20 Pages) Texas Instruments – DUAL H-BRIDGE DRIVER IC

DRV8843
SLVSAS8C – APRIL 2011 – REVISED AUGUST 2013
FUNCTIONAL DESCRIPTION
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PWM Motor Drivers
The DRV8843 contains two H-bridge motor drivers with current-control PWM circuitry. A block diagram of the
motor control circuitry is shown in Figure 1.
AIN1
AIN2
DECAY
AI[1:0]
VCP, VGD
OCP
Pre-
drive
PWM
DAC
2
OCP
-
+
A=5
VM
VM
AOUT1
AOUT 2
DCM
AISEN
AVREF
BIN1
BIN2
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.
8
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