DRV8841_15 Datasheet, PDF (10/28 Pages) Texas Instruments – Dual H-Bridge Driver IC

DRV8841
SLVSAC0F – MAY 2010 – REVISED DECEMBER 2015
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7.3 Feature Description
7.3.1 PWM Motor Drivers
The DRV8841 contains two H-bridge motor drivers with current-control PWM circuitry. A block diagram of the
motor control circuitry is shown in Figure 5.
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 5. Motor Control Circuitry
Note that there are multiple VM pins. All VM pins must be connected together to the motor supply voltage.
10
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