DRV8840_15 Datasheet, PDF (9/28 Pages) Texas Instruments – DC Motor Driver IC

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7.2 Functional Block Diagram
DRV8840
SLVSAB7D – MAY 2010 – REVISED DECEMBER 2015
3.3V
V3P3OUT
VM
LS Gate
Drive
3.3V
VREF
VREF
V3P3OUT
Internal
VCC
Low Side
Gate
Drive
PHASE
ENBL
I0
I1
I2
I3
I4
DECAY
nRESET
nSLEEP
Control
Logic/
Indexer
nFAULT
Thermal
Shut
Down
Charge
Pump
CP1
HS Gate
Drive
VM
CP2
VM
VCP
VM
VM
VM
+ _Additional
Bulk Cap
OUT1
OUT1
Motor Driver
BDC
+
Stepper
Motor
-
OUT2
OUT2
ISEN
ISEN
GND
PPAD
GND
7.3 Feature Description
7.3.1 PWM Motor Driver
The DRV8840 device contains one H-bridge motor driver with current-control PWM circuitry. A block diagram of
the motor control circuitry is shown in Figure 5.
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